Elegant Code » Silverlight http://elegantcode.com Tue, 15 May 2012 10:00:00 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Buy Retin-A Without Prescription http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-part-1setting-up-the-prism-application http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/#comments Wed, 25 Apr 2012 20:03:18 +0000 Brian Lagunas http://elegantcode.com/?p=5158

Buy Retin-A Without Prescription, This is the first video in a series that will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  This video covers how to setup a multi-platform Prism application that targets WPF and Silverlight.  I show you how to setup your directory structure, as well as the solution/project structure inside Visual Studio.  We also create a functional Silverlight and WPF shell application and see our first glimpse of code sharing with the bootstrapper.

Watch the video on Xaml TV.

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]]> http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/feed/ 0 Amoxicillin For Sale http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-introduction-to-a-prism-app http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/#comments Tue, 24 Apr 2012 01:41:57 +0000 Brian Lagunas http://elegantcode.com/?p=5156

Amoxicillin For Sale, Often when learning a technology you start by searching the web.  You look for videos, blogs, articles, samples, and examples.  What you start to realize is that everything you find is very simple “demo” code.  That’s code that shows how to implement a simple feature in a non-realistic demo.  Then you start looking for “production” code examples.  That’s code that represents a more realistic implementation of an application in a production environment.  This type of resource is very difficult to find.  Why?  Mainly, because it is very time consuming to create such examples.

This scenario is no different when trying to learn Prism.  You probably first start by reading though the documentation.  Next, you head on over to Pluralsight and watch my Introduction to Prism course.  Now that you know all the basics you start searching the web for examples for specific scenarios.  How do I do “x” and “y”?  How do I apply this sample code to my application?  Hopefully I can help you answer those questions.

I am starting a new video series called Building IG Outlook.  I will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  We will be discussing the following key areas in no specific order:

  1. Application architecture/structure
  2. Multi-platform support (WPF and Silverlight)
  3. Commanding
  4. Event aggregation
  5. Custom RegionAdapters
  6. Custom RegionBehaviors
  7. Navigation (OutlookBar, Ribbon, and View interaction)
  8. MVVM (no frameworks needed)

Like most production applications we will have a dependency on a 3rd party toolset.  I will be using Infragistics NetAdvantage for WPF and Silverlight.  If you don’t own Infragistics you can download the trial or purchase the suite so you can compile and run all the sample code.  Otherwise, you will have to modify the code to work with your vendor of choice.

I hope this series will help you gain a better understanding of how you can use the various aspects of Prism to build your applications.  This will be a long series and I plan to record at least one a week depending on my traveling schedule.  If you have any questions or would like to see something specific be sure to let me know, and I will see if I can squeeze an example in the application.

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]]> http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/feed/ 0 Buy Flagyl Without Prescription http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/?utm_source=rss&utm_medium=rss&utm_campaign=create-a-custom-prism-regionadapter http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/#comments Wed, 18 Apr 2012 19:26:48 +0000 Brian Lagunas http://elegantcode.com/?p=5148

Don’t want to read the article?  Watch the video tutorial on Xaml TV.

Prism provides 4 region adapters out of the box for you:

  • ContentControlRegionAdapter
  • SelectorRegionAdaptor
  • ItemsControlRegionAdapter
  • TabControlRegionAdapter (Silverlight only)

Buy Flagyl Without Prescription, Well, what happens when you want to use a different control as a region host?  Simple.  You need to write a custom region adapter for it.  Is it hard you ask?  No it is quite easy.  Let’s write one for the StackPanel.

Start by creating a class the derive from and implements the base abstract class RegionAdapterBase<T>.

public class StackPanelRegionAdapter : RegionAdapterBase<StackPanel>
{
    public StackPanelRegionAdapter(IRegionBehaviorFactory factory)
        : base(factory)
    {

    }

    protected override void Adapt(IRegion region, StackPanel regionTarget)
    {
        region.Views.CollectionChanged += (s, e) =>
            {
                if (e.Action == NotifyCollectionChangedAction.Add)
                {
                    foreach (FrameworkElement element in e.NewItems)
                    {
                        regionTarget.Children.Add(element);
                    }
                }

                //implement remove
            };
    }

    protected override IRegion CreateRegion()
    {
        return new AllActiveRegion();
    }
}

Notice that there are two methods we need to implement. Adapt and CreateRegion.  CreateRegion return the type of region we will need.  In our case we want to support multiple views so we need to return an instance of an AllActiveRegion.  If we only needed support for one view at a time we would return a SingleActiveRegion.  The Adapt method is responsible for adapting the region to our control.  This is where we will add and remove the views to or host control.

Now we simply have to tell Prism about our new RegionAdapter.  We do this in the bootstrapper.  Simply override the ConfigureRegionAdapterMappings method as follows:

protected override Microsoft.Practices.Prism.Regions.RegionAdapterMappings ConfigureRegionAdapterMappings()
{
    RegionAdapterMappings mappings = base.ConfigureRegionAdapterMappings();
    mappings.RegisterMapping(typeof(StackPanel), Flagyl dose, Buy generic Flagyl, Container.Resolve<StackPanelRegionAdapter>());
    return mappings;
}

That’s it.  Now you can use a StackPanel as a region host:

<StackPanel Orientation="Horizontal"
            prism:RegionManager.RegionName="MyRegion" />

 

Download the sample application.

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]]> http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/feed/ 1 Retin-A For Sale http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/?utm_source=rss&utm_medium=rss&utm_campaign=validate-a-property-against-a-parent-collection http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/#comments Thu, 12 Apr 2012 00:34:53 +0000 Brian Lagunas http://elegantcode.com/?p=5076

Retin-A For Sale, I was monitoring my Twitter feed, like I always do, and saw a tweet come through asking about how to validate an object’s property against it’s parent ObservableCollection in the Infragistics XamDataGrid.  What this person was trying to accomplish was to validate a duplicate item in his data source.  They have a POCO object the implements the IDataErrorInfo interface, and an ObservableColletion<POCO> as the data source.  They want to check the ObservableCollection<POCO> for a pre-existing item whenever a property value in a POCO changes.  Obviously this is not a XamDataGrid issue, but rather an object design issue.  So I decided to whip up a quick and dirty solution to solve this particular issue.

The approach I am going to take is to simply keep track of the parent collection from within the POCO object itself.  I really like interfaces, so I started out by defining a simple interface my POCOs will implement.

public interface IHasParent
{
    object Parent { get; set; }
}

Now let’s take a look at the simple POCO I will be using in this example.

public class Person : INotifyPropertyChanged, IDataErrorInfo
{
    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice that we implement both the INotifyPropertyChanged interfaces as well as the IDataErrorInfo interface.  The Next thing we need is a custom ObservableCollection to use as our data source.

public class HasParentObservableCollection<T> : ObservableCollection<T>
{
    protected override void InsertItem(int index, T item)
    {
        //set the parent object when a new item is added to our collection
        if (item != null && item is IHasParent)
            (item as IHasParent).Parent = this;

        base.InsertItem(index, item);
    }
}

Notice that we are casting our item as the IHasParent interface and setting the Parent property accordingly.  The next thing we need to do is have our POCO class implement the IHasPerson interface.

public class Person : INotifyPropertyChanged, IDataErrorInfo, IHasParent
{
    public object Parent { get; set; }

    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";

                if (Parent != null && Parent is IList<Person>)
                {
                    var list = (IList<Person>) Parent;
                    if (list.Count(x => x.LastName == LastName) > 1)
                        return "This last name already exists.  Please use a different last name.";
                }
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice how we implemented the check for a duplicate last name.  We simply checked to make sure we are dealing with the LastName property.  Then we cast the Parent as an IList<Person> so that we can perform a simply LINQ query against it.  We check the parent collection for any results that match the LastName property.  If more than one is returned we have a duplicate.

So let’s test this baby using the XamDataGrid as the original poster was attempting to do.  First create our UI.

<igDP:XamDataGrid Name="xamDataGrid1">
    <igDP:XamDataGrid.FieldLayouts>
        <igDP:FieldLayout>
            <igDP:Field Name="FirstName" Label="First Name" />
            <igDP:Field Name="LastName" Label="Last Name" />
        </igDP:FieldLayout>
    </igDP:XamDataGrid.FieldLayouts>
    <igDP:XamDataGrid.FieldLayoutSettings>
        <igDP:FieldLayoutSettings AddNewRecordLocation="OnTop"
                                  AllowAddNew="True"
                                  AutoGenerateFields="False"
                                  SupportDataErrorInfo="RecordsAndCells"
                                  DataErrorDisplayMode="Highlight" />
    </igDP:XamDataGrid.FieldLayoutSettings>
</igDP:XamDataGrid>

Next let’s hook up some data to this bad boy:

public MainWindow()
{
    InitializeComponent();

    var people = new HasParentObservableCollection<Person>();
    people.Add(new Person(){ FirstName = "Brian", LastName = "Lagunas"});
    xamDataGrid1.DataSource = people;
}

Now let’s run the app, type a duplicate last name, and see what we get.

collection_validated

Cool. Works as expected.  Now there are a number of ways to accomplish this task.  There are even frameworks out there that have already solved this problem for you such as CSLA.  I hope this simple approach helps you find a solution that works for you.

Download the Source.

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]]> http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/feed/ 2 Human Growth Hormone For Sale http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/?utm_source=rss&utm_medium=rss&utm_campaign=victor-gaudiosopreserving-his-contributions http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/#comments Fri, 06 Apr 2012 19:55:39 +0000 Brian Lagunas http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/

It was Sunday night.  Victor and I were having a video call on Skype finalizing our plans to host his 70+ Silverlight video tutorials on Xaml TV Human Growth Hormone For Sale, .  He was late to our meeting because he said he didn’t feel well.  He said that he was recovering from a week long illness, but he quickly assured me he was feeling better.  We chatted for awhile and then ended the meeting with some friendly banter like we always have in the past.

Sadly the next day, on the morning of Monday April 2, 2012, Victor Gaudioso passed away.  You didn’t have to know Victor long to know that he was passionate about his work and about his community.  He always went the extra mile to help his fellow developer.  I can write pages about all the good things he has done for his family, friends, and community, but instead I would like encourage you to share your memories of Victor.  Think of how he has influenced you in your life.

The Sunday before he passed, Victor gave me 73 of his videos that we would be posting on Xaml TV.  That night he posted 10 of his Microsoft Starter Kit videos.  Unfortunately he passed before he could finish his effort.  With the blessing of his family and the help of his community, we will be posting all 73 of Victor Gaudioso’s Silverlight video tutorials on Xaml TV.  We will preserve his work and contributions that he made to the community.  They will live on and not disappear with an expiring domain or hosting plan.  His legacy will continue to grow as you remember the fond memories you have of him.

If you would like to help by donating to Victor’s memorial fund or to volunteer, please visit the Los Angeles Silverlight User Group site.

Rest in peace my friend.

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]]> http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/feed/ 0 Spiriva For Sale http://elegantcode.com/2012/03/27/introducing-xaml-tv/?utm_source=rss&utm_medium=rss&utm_campaign=introducing-xaml-tv http://elegantcode.com/2012/03/27/introducing-xaml-tv/#comments Tue, 27 Mar 2012 21:46:51 +0000 Brian Lagunas http://elegantcode.com/2012/03/27/introducing-xaml-tv/

I would like announce the creation of a new developer webcast that focuses on Xaml application development called Xaml TV Spiriva For Sale, .  The purpose of Xaml TV is to provide quality Xaml content through interviews with individuals, community leaders, and technology experts in the fields of WPF, Silverlight, Windows Phone, and WinRT/Metro.  If it is Xaml we will cover it.

Currently, Xaml TV is still in the planning phase, heck we don’t even have a logo, and is targeting mid April 2012 to start recording content.  If you would like to submit a talk please feel free to contact me using the contact form.  This content is for the community by the community.  Anyone is welcome to participate.  If you have a topic you want to discuss, just submit your session and we will get you scheduled.

Please help spread the word and make this a valuable resource for our Xaml community.

Follow us on Twitter: @XamlTV and/or @BrianLagunas

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]]> http://elegantcode.com/2012/03/27/introducing-xaml-tv/feed/ 0 Buy Spiriva Without Prescription http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/?utm_source=rss&utm_medium=rss&utm_campaign=creating-a-silverlight-5-static-markup-extension http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/#comments Fri, 23 Mar 2012 19:28:28 +0000 Brian Lagunas http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/

If you have done any WPF application development I am sure you have used and fallen in love with the Static Buy Spiriva Without Prescription, markup extension.  If you’re are not familiar with it, the Static markup extension allows you to reference static fields and properties in your XAML markup.

For example; let’s assume we have a class with the following static field defined:

public class Common
{
    public static string StaticText = "This is text from a static property";
}

We can use this field in our WPF application as follows:

<Grid>
    <TextBlock Text="{x:Static ext:Common.StaticText}" />
</Grid>

image

NOTE: “ext” is a namespace that has been defined to instruct the XAML parser where to find our static field.

Pretty cool right?  Unfortunately if you are also doing any Silverlight development you will soon find that this wonderful and useful extension does NOT exist in Silverlight.  Luckily for us in Silverlight 5 we were given the ability to write our own custom markup extensions.  This can be done using either the IMarkupExtension or the abstract MarkupExtension class.

Now it’s time to create our own Static markup extension.  I want to point out that there is a naming convention when creating custom markup extensions.  The convention is as follows; ExtensionNameExtension.  The name of the extension is followed by Extension.  This is very similar to how you create attributes.  You won’t actually be using the suffix when define them in XAML. 

Let’s start by creating a new class called StaticExtension.  The StaticExtension class should derive from the MarkupExtension abstract class.  You will need to implement the abstract ProvideValue method.  The code I used for the Static markup extension is as follows.

/// <summary>
///  Class for Xaml markup extension for static field and property references.
/// </summary>
public class StaticExtension : MarkupExtension
{
    /// <summary>
    ///  The static field or property represented by a string.  This string is
    ///  of the format Prefix:ClassName.FieldOrPropertyName.  The Prefix is
    ///  optional, and refers to the XML prefix in a Xaml file.
    /// </summary>
    private string _member;
    public string Member
    {
        get { return _member; }
        set
        {
            if (value == null)
            {
                throw new ArgumentNullException("Member");
            }
            _member = value;
        }
    }

    /// <summary>
    ///  Return an object that should be set on the targetObject's targetProperty
    ///  for this markup extension.  For a StaticExtension this is a static field
    ///  or property value.
    /// </summary>
    /// <param name="serviceProvider">Object that can provide services for the markup extension.
    /// <returns>
    ///  The object to set on this property.
    /// </returns>
    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (_member == null)
            throw new InvalidOperationException("member cannot be null");

        // Validate the _member
        int dotIndex = _member.IndexOf('.');
        if (dotIndex < 0)
            throw new ArgumentException("dotIndex");

        // Pull out the type substring (this will include any XML prefix, e.g. "av:Button")
        string typeString = _member.Substring(0, Spiriva street price, Buy cheap Spiriva no rx, dotIndex);
        if (typeString == string.Empty)
            throw new ArgumentException("typeString");

        // Get the IXamlTypeResolver from the service provider
        IXamlTypeResolver xamlTypeResolver = serviceProvider.GetService(typeof(IXamlTypeResolver)) as IXamlTypeResolver;
        if (xamlTypeResolver == null)
            throw new ArgumentException("xamlTypeResolver");

        // Use the type resolver to get a Type instance
        Type type = xamlTypeResolver.Resolve(typeString);

        // Get the member name substring
        string fieldString = _member.Substring(dotIndex + 1, _member.Length - dotIndex - 1);
        if (fieldString == string.Empty)
            throw new ArgumentException("fieldString");

        // Use the built-in parser for enum types
        if (type.IsEnum)
        {
            return Enum.Parse(type, japan, craiglist, ebay, overseas, paypal, Order Spiriva from United States pharmacy, fieldString, true);
        }

        // For other types, Spiriva photos, After Spiriva, reflect
        bool found = false;
        object value = null;

        object fieldOrProp = type.GetField(fieldString, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
        if (fieldOrProp == null)
        {
            fieldOrProp = type.GetProperty(fieldString, Spiriva mg, Spiriva price, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
            if (fieldOrProp is PropertyInfo)
            {
                value = ((PropertyInfo)fieldOrProp).GetValue(null, null);
                found = true;
            }
        }
        else if (fieldOrProp is FieldInfo)
        {
            value = ((FieldInfo)fieldOrProp).GetValue(null);
            found = true;
        }

        if (found)
            return value;
        else
            throw new ArgumentException("not found");
    }
}

Now all I need to do is add a namespace to my Silverlight view and then use it in XAML as follows:

<Grid x:Name="LayoutRoot" Background="White">
    <TextBlock Text="{ext:Static Member=ext:Common.StaticText}" />
</Grid>

image

That’s it!  I will definitely be using this quite often.  I would like to mention that unlike in WPF where you don’t have to specify the “Member” property explicitly, buy Spiriva online no prescription, Spiriva brand name, in Silveright you have to explicitly set the Member property.  This is because there is not a ConstructorArgument attribute in Silverlight.  So until then you will need to have a little extra text in your markup syntax.

Download the source.

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]]> http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/feed/ 2 Cephalexin For Sale http://elegantcode.com/2011/11/04/free-prism-training/?utm_source=rss&utm_medium=rss&utm_campaign=free-prism-training http://elegantcode.com/2011/11/04/free-prism-training/#comments Sat, 05 Nov 2011 04:23:40 +0000 Brian Lagunas http://elegantcode.com/2011/11/04/free-prism-training/

I am excited to announce that Pluralsight and Microsoft’s Patterns & Practices Cephalexin For Sale, team have joined forces to provide you with free access to over 4 hours of online Prism training.  That’s right, you heard me correctly. FREE online Prism training sponsored by the one and only Patterns & Practices team.  I know you have some question so let me answer the most common:

Q & A

Q1, after Cephalexin. Cephalexin price, When is this free training available?
A1. The entire weekend of Nov 12th 2011 through Nov 14th 2011.

Q2, ordering Cephalexin online. Cephalexin class, Do I have to be a Pluralsight subscriber to get this awesome training?
A2. This training will be freely available to everyone, Cephalexin For Sale. You do not have to be a subscriber.

Q3, Cephalexin alternatives. Cephalexin wiki, What does the course cover?
A3. Well let’s take a look:

  • Getting started with Prism
  • Bootstrapper and Shell
  • Regions
  • Modules
  • Views
  • Communication
  • State-Based Navigation
  • View-Based Navigation

More course information.

Q4, Cephalexin samples. Order Cephalexin from mexican pharmacy, Who is the author of this kick ass Prism course?
Q4. That would be me.

Cephalexin For Sale, Q5. Is it really free?
Q5, buy Cephalexin online cod. Herbal Cephalexin, You’re kidding right. Didn’t I already cover this part, about Cephalexin. Cephalexin natural, Yes, it is free.

New and Improved

If you are a subscriber and have already watched the course, Cephalexin trusted pharmacy reviews, Cephalexin description, I would like to bring to your attention that there have been two new modules added.  These modules will cover everything you need to know in order to start using the navigation services provided by Prism.  This includes state-based navigation and view-based navigation.

Mark your calendar for Nov 12th and be sure to cram as much Prism knowledge into your brain as you can before the weekend ends.  Don’t worry, if you run out of time you can always ask me questions directly.  You can contact me either through Twitter (@brianlagunas) or through the Extended WPF Toolkit project site.  I hope you enjoy the training.

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]]> http://elegantcode.com/2011/11/04/free-prism-training/feed/ 6 Silverlight 4 Service Release 4.0.50826.0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/?utm_source=rss&utm_medium=rss&utm_campaign=silverlight-4-service-release-4-0-50826-0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/#comments Thu, 02 Sep 2010 15:07:03 +0000 Brian Lagunas http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/ In case you haven’t heard yet, Microsoft released a new update for Silverlight 4 yesterday, along with a new SDK.  You can check out the details at KB2164913.

The stuff I was interested in:

  • Add New Row for the DataGrid
  • Improved application startup performance
  • Mouse wheel support for out-of-browser  applications on the Mac
  • Media bug fixes
  • MouseCapture memory leak is fixed
  • Inline DataTemplate memory leak fixed.

Developers go get the tools:

]]> http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/feed/ 0 geekSpeak: Local Messaging and Silverlight on Channel9 http://elegantcode.com Tue, 15 May 2012 10:00:00 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Elegant Code » Silverlight http://elegantcode.com Tue, 15 May 2012 10:00:00 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Buy Retin-A Without Prescription http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-part-1setting-up-the-prism-application http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/#comments Wed, 25 Apr 2012 20:03:18 +0000 Brian Lagunas http://elegantcode.com/?p=5158

Buy Retin-A Without Prescription, This is the first video in a series that will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  This video covers how to setup a multi-platform Prism application that targets WPF and Silverlight.  I show you how to setup your directory structure, as well as the solution/project structure inside Visual Studio.  We also create a functional Silverlight and WPF shell application and see our first glimpse of code sharing with the bootstrapper.

Watch the video on Xaml TV.

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]]> http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/feed/ 0 Amoxicillin For Sale http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-introduction-to-a-prism-app http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/#comments Tue, 24 Apr 2012 01:41:57 +0000 Brian Lagunas http://elegantcode.com/?p=5156

Amoxicillin For Sale, Often when learning a technology you start by searching the web.  You look for videos, blogs, articles, samples, and examples.  What you start to realize is that everything you find is very simple “demo” code.  That’s code that shows how to implement a simple feature in a non-realistic demo.  Then you start looking for “production” code examples.  That’s code that represents a more realistic implementation of an application in a production environment.  This type of resource is very difficult to find.  Why?  Mainly, because it is very time consuming to create such examples.

This scenario is no different when trying to learn Prism.  You probably first start by reading though the documentation.  Next, you head on over to Pluralsight and watch my Introduction to Prism course.  Now that you know all the basics you start searching the web for examples for specific scenarios.  How do I do “x” and “y”?  How do I apply this sample code to my application?  Hopefully I can help you answer those questions.

I am starting a new video series called Building IG Outlook.  I will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  We will be discussing the following key areas in no specific order:

  1. Application architecture/structure
  2. Multi-platform support (WPF and Silverlight)
  3. Commanding
  4. Event aggregation
  5. Custom RegionAdapters
  6. Custom RegionBehaviors
  7. Navigation (OutlookBar, Ribbon, and View interaction)
  8. MVVM (no frameworks needed)

Like most production applications we will have a dependency on a 3rd party toolset.  I will be using Infragistics NetAdvantage for WPF and Silverlight.  If you don’t own Infragistics you can download the trial or purchase the suite so you can compile and run all the sample code.  Otherwise, you will have to modify the code to work with your vendor of choice.

I hope this series will help you gain a better understanding of how you can use the various aspects of Prism to build your applications.  This will be a long series and I plan to record at least one a week depending on my traveling schedule.  If you have any questions or would like to see something specific be sure to let me know, and I will see if I can squeeze an example in the application.

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]]> http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/feed/ 0 Buy Flagyl Without Prescription http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/?utm_source=rss&utm_medium=rss&utm_campaign=create-a-custom-prism-regionadapter http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/#comments Wed, 18 Apr 2012 19:26:48 +0000 Brian Lagunas http://elegantcode.com/?p=5148

Don’t want to read the article?  Watch the video tutorial on Xaml TV.

Prism provides 4 region adapters out of the box for you:

  • ContentControlRegionAdapter
  • SelectorRegionAdaptor
  • ItemsControlRegionAdapter
  • TabControlRegionAdapter (Silverlight only)

Buy Flagyl Without Prescription, Well, what happens when you want to use a different control as a region host?  Simple.  You need to write a custom region adapter for it.  Is it hard you ask?  No it is quite easy.  Let’s write one for the StackPanel.

Start by creating a class the derive from and implements the base abstract class RegionAdapterBase<T>.

public class StackPanelRegionAdapter : RegionAdapterBase<StackPanel>
{
    public StackPanelRegionAdapter(IRegionBehaviorFactory factory)
        : base(factory)
    {

    }

    protected override void Adapt(IRegion region, StackPanel regionTarget)
    {
        region.Views.CollectionChanged += (s, e) =>
            {
                if (e.Action == NotifyCollectionChangedAction.Add)
                {
                    foreach (FrameworkElement element in e.NewItems)
                    {
                        regionTarget.Children.Add(element);
                    }
                }

                //implement remove
            };
    }

    protected override IRegion CreateRegion()
    {
        return new AllActiveRegion();
    }
}

Notice that there are two methods we need to implement. Adapt and CreateRegion.  CreateRegion return the type of region we will need.  In our case we want to support multiple views so we need to return an instance of an AllActiveRegion.  If we only needed support for one view at a time we would return a SingleActiveRegion.  The Adapt method is responsible for adapting the region to our control.  This is where we will add and remove the views to or host control.

Now we simply have to tell Prism about our new RegionAdapter.  We do this in the bootstrapper.  Simply override the ConfigureRegionAdapterMappings method as follows:

protected override Microsoft.Practices.Prism.Regions.RegionAdapterMappings ConfigureRegionAdapterMappings()
{
    RegionAdapterMappings mappings = base.ConfigureRegionAdapterMappings();
    mappings.RegisterMapping(typeof(StackPanel), Flagyl dose, Buy generic Flagyl, Container.Resolve<StackPanelRegionAdapter>());
    return mappings;
}

That’s it.  Now you can use a StackPanel as a region host:

<StackPanel Orientation="Horizontal"
            prism:RegionManager.RegionName="MyRegion" />

 

Download the sample application.

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]]> http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/feed/ 1 Retin-A For Sale http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/?utm_source=rss&utm_medium=rss&utm_campaign=validate-a-property-against-a-parent-collection http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/#comments Thu, 12 Apr 2012 00:34:53 +0000 Brian Lagunas http://elegantcode.com/?p=5076

Retin-A For Sale, I was monitoring my Twitter feed, like I always do, and saw a tweet come through asking about how to validate an object’s property against it’s parent ObservableCollection in the Infragistics XamDataGrid.  What this person was trying to accomplish was to validate a duplicate item in his data source.  They have a POCO object the implements the IDataErrorInfo interface, and an ObservableColletion<POCO> as the data source.  They want to check the ObservableCollection<POCO> for a pre-existing item whenever a property value in a POCO changes.  Obviously this is not a XamDataGrid issue, but rather an object design issue.  So I decided to whip up a quick and dirty solution to solve this particular issue.

The approach I am going to take is to simply keep track of the parent collection from within the POCO object itself.  I really like interfaces, so I started out by defining a simple interface my POCOs will implement.

public interface IHasParent
{
    object Parent { get; set; }
}

Now let’s take a look at the simple POCO I will be using in this example.

public class Person : INotifyPropertyChanged, IDataErrorInfo
{
    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice that we implement both the INotifyPropertyChanged interfaces as well as the IDataErrorInfo interface.  The Next thing we need is a custom ObservableCollection to use as our data source.

public class HasParentObservableCollection<T> : ObservableCollection<T>
{
    protected override void InsertItem(int index, T item)
    {
        //set the parent object when a new item is added to our collection
        if (item != null && item is IHasParent)
            (item as IHasParent).Parent = this;

        base.InsertItem(index, item);
    }
}

Notice that we are casting our item as the IHasParent interface and setting the Parent property accordingly.  The next thing we need to do is have our POCO class implement the IHasPerson interface.

public class Person : INotifyPropertyChanged, IDataErrorInfo, IHasParent
{
    public object Parent { get; set; }

    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";

                if (Parent != null && Parent is IList<Person>)
                {
                    var list = (IList<Person>) Parent;
                    if (list.Count(x => x.LastName == LastName) > 1)
                        return "This last name already exists.  Please use a different last name.";
                }
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice how we implemented the check for a duplicate last name.  We simply checked to make sure we are dealing with the LastName property.  Then we cast the Parent as an IList<Person> so that we can perform a simply LINQ query against it.  We check the parent collection for any results that match the LastName property.  If more than one is returned we have a duplicate.

So let’s test this baby using the XamDataGrid as the original poster was attempting to do.  First create our UI.

<igDP:XamDataGrid Name="xamDataGrid1">
    <igDP:XamDataGrid.FieldLayouts>
        <igDP:FieldLayout>
            <igDP:Field Name="FirstName" Label="First Name" />
            <igDP:Field Name="LastName" Label="Last Name" />
        </igDP:FieldLayout>
    </igDP:XamDataGrid.FieldLayouts>
    <igDP:XamDataGrid.FieldLayoutSettings>
        <igDP:FieldLayoutSettings AddNewRecordLocation="OnTop"
                                  AllowAddNew="True"
                                  AutoGenerateFields="False"
                                  SupportDataErrorInfo="RecordsAndCells"
                                  DataErrorDisplayMode="Highlight" />
    </igDP:XamDataGrid.FieldLayoutSettings>
</igDP:XamDataGrid>

Next let’s hook up some data to this bad boy:

public MainWindow()
{
    InitializeComponent();

    var people = new HasParentObservableCollection<Person>();
    people.Add(new Person(){ FirstName = "Brian", LastName = "Lagunas"});
    xamDataGrid1.DataSource = people;
}

Now let’s run the app, type a duplicate last name, and see what we get.

collection_validated

Cool. Works as expected.  Now there are a number of ways to accomplish this task.  There are even frameworks out there that have already solved this problem for you such as CSLA.  I hope this simple approach helps you find a solution that works for you.

Download the Source.

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]]> http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/feed/ 2 Human Growth Hormone For Sale http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/?utm_source=rss&utm_medium=rss&utm_campaign=victor-gaudiosopreserving-his-contributions http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/#comments Fri, 06 Apr 2012 19:55:39 +0000 Brian Lagunas http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/

It was Sunday night.  Victor and I were having a video call on Skype finalizing our plans to host his 70+ Silverlight video tutorials on Xaml TV Human Growth Hormone For Sale, .  He was late to our meeting because he said he didn’t feel well.  He said that he was recovering from a week long illness, but he quickly assured me he was feeling better.  We chatted for awhile and then ended the meeting with some friendly banter like we always have in the past.

Sadly the next day, on the morning of Monday April 2, 2012, Victor Gaudioso passed away.  You didn’t have to know Victor long to know that he was passionate about his work and about his community.  He always went the extra mile to help his fellow developer.  I can write pages about all the good things he has done for his family, friends, and community, but instead I would like encourage you to share your memories of Victor.  Think of how he has influenced you in your life.

The Sunday before he passed, Victor gave me 73 of his videos that we would be posting on Xaml TV.  That night he posted 10 of his Microsoft Starter Kit videos.  Unfortunately he passed before he could finish his effort.  With the blessing of his family and the help of his community, we will be posting all 73 of Victor Gaudioso’s Silverlight video tutorials on Xaml TV.  We will preserve his work and contributions that he made to the community.  They will live on and not disappear with an expiring domain or hosting plan.  His legacy will continue to grow as you remember the fond memories you have of him.

If you would like to help by donating to Victor’s memorial fund or to volunteer, please visit the Los Angeles Silverlight User Group site.

Rest in peace my friend.

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]]> http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/feed/ 0 Spiriva For Sale http://elegantcode.com/2012/03/27/introducing-xaml-tv/?utm_source=rss&utm_medium=rss&utm_campaign=introducing-xaml-tv http://elegantcode.com/2012/03/27/introducing-xaml-tv/#comments Tue, 27 Mar 2012 21:46:51 +0000 Brian Lagunas http://elegantcode.com/2012/03/27/introducing-xaml-tv/

I would like announce the creation of a new developer webcast that focuses on Xaml application development called Xaml TV Spiriva For Sale, .  The purpose of Xaml TV is to provide quality Xaml content through interviews with individuals, community leaders, and technology experts in the fields of WPF, Silverlight, Windows Phone, and WinRT/Metro.  If it is Xaml we will cover it.

Currently, Xaml TV is still in the planning phase, heck we don’t even have a logo, and is targeting mid April 2012 to start recording content.  If you would like to submit a talk please feel free to contact me using the contact form.  This content is for the community by the community.  Anyone is welcome to participate.  If you have a topic you want to discuss, just submit your session and we will get you scheduled.

Please help spread the word and make this a valuable resource for our Xaml community.

Follow us on Twitter: @XamlTV and/or @BrianLagunas

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]]> http://elegantcode.com/2012/03/27/introducing-xaml-tv/feed/ 0 Buy Spiriva Without Prescription http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/?utm_source=rss&utm_medium=rss&utm_campaign=creating-a-silverlight-5-static-markup-extension http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/#comments Fri, 23 Mar 2012 19:28:28 +0000 Brian Lagunas http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/

If you have done any WPF application development I am sure you have used and fallen in love with the Static Buy Spiriva Without Prescription, markup extension.  If you’re are not familiar with it, the Static markup extension allows you to reference static fields and properties in your XAML markup.

For example; let’s assume we have a class with the following static field defined:

public class Common
{
    public static string StaticText = "This is text from a static property";
}

We can use this field in our WPF application as follows:

<Grid>
    <TextBlock Text="{x:Static ext:Common.StaticText}" />
</Grid>

image

NOTE: “ext” is a namespace that has been defined to instruct the XAML parser where to find our static field.

Pretty cool right?  Unfortunately if you are also doing any Silverlight development you will soon find that this wonderful and useful extension does NOT exist in Silverlight.  Luckily for us in Silverlight 5 we were given the ability to write our own custom markup extensions.  This can be done using either the IMarkupExtension or the abstract MarkupExtension class.

Now it’s time to create our own Static markup extension.  I want to point out that there is a naming convention when creating custom markup extensions.  The convention is as follows; ExtensionNameExtension.  The name of the extension is followed by Extension.  This is very similar to how you create attributes.  You won’t actually be using the suffix when define them in XAML. 

Let’s start by creating a new class called StaticExtension.  The StaticExtension class should derive from the MarkupExtension abstract class.  You will need to implement the abstract ProvideValue method.  The code I used for the Static markup extension is as follows.

/// <summary>
///  Class for Xaml markup extension for static field and property references.
/// </summary>
public class StaticExtension : MarkupExtension
{
    /// <summary>
    ///  The static field or property represented by a string.  This string is
    ///  of the format Prefix:ClassName.FieldOrPropertyName.  The Prefix is
    ///  optional, and refers to the XML prefix in a Xaml file.
    /// </summary>
    private string _member;
    public string Member
    {
        get { return _member; }
        set
        {
            if (value == null)
            {
                throw new ArgumentNullException("Member");
            }
            _member = value;
        }
    }

    /// <summary>
    ///  Return an object that should be set on the targetObject's targetProperty
    ///  for this markup extension.  For a StaticExtension this is a static field
    ///  or property value.
    /// </summary>
    /// <param name="serviceProvider">Object that can provide services for the markup extension.
    /// <returns>
    ///  The object to set on this property.
    /// </returns>
    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (_member == null)
            throw new InvalidOperationException("member cannot be null");

        // Validate the _member
        int dotIndex = _member.IndexOf('.');
        if (dotIndex < 0)
            throw new ArgumentException("dotIndex");

        // Pull out the type substring (this will include any XML prefix, e.g. "av:Button")
        string typeString = _member.Substring(0, Spiriva street price, Buy cheap Spiriva no rx, dotIndex);
        if (typeString == string.Empty)
            throw new ArgumentException("typeString");

        // Get the IXamlTypeResolver from the service provider
        IXamlTypeResolver xamlTypeResolver = serviceProvider.GetService(typeof(IXamlTypeResolver)) as IXamlTypeResolver;
        if (xamlTypeResolver == null)
            throw new ArgumentException("xamlTypeResolver");

        // Use the type resolver to get a Type instance
        Type type = xamlTypeResolver.Resolve(typeString);

        // Get the member name substring
        string fieldString = _member.Substring(dotIndex + 1, _member.Length - dotIndex - 1);
        if (fieldString == string.Empty)
            throw new ArgumentException("fieldString");

        // Use the built-in parser for enum types
        if (type.IsEnum)
        {
            return Enum.Parse(type, japan, craiglist, ebay, overseas, paypal, Order Spiriva from United States pharmacy, fieldString, true);
        }

        // For other types, Spiriva photos, After Spiriva, reflect
        bool found = false;
        object value = null;

        object fieldOrProp = type.GetField(fieldString, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
        if (fieldOrProp == null)
        {
            fieldOrProp = type.GetProperty(fieldString, Spiriva mg, Spiriva price, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
            if (fieldOrProp is PropertyInfo)
            {
                value = ((PropertyInfo)fieldOrProp).GetValue(null, null);
                found = true;
            }
        }
        else if (fieldOrProp is FieldInfo)
        {
            value = ((FieldInfo)fieldOrProp).GetValue(null);
            found = true;
        }

        if (found)
            return value;
        else
            throw new ArgumentException("not found");
    }
}

Now all I need to do is add a namespace to my Silverlight view and then use it in XAML as follows:

<Grid x:Name="LayoutRoot" Background="White">
    <TextBlock Text="{ext:Static Member=ext:Common.StaticText}" />
</Grid>

image

That’s it!  I will definitely be using this quite often.  I would like to mention that unlike in WPF where you don’t have to specify the “Member” property explicitly, buy Spiriva online no prescription, Spiriva brand name, in Silveright you have to explicitly set the Member property.  This is because there is not a ConstructorArgument attribute in Silverlight.  So until then you will need to have a little extra text in your markup syntax.

Download the source.

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]]> http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/feed/ 2 Cephalexin For Sale http://elegantcode.com/2011/11/04/free-prism-training/?utm_source=rss&utm_medium=rss&utm_campaign=free-prism-training http://elegantcode.com/2011/11/04/free-prism-training/#comments Sat, 05 Nov 2011 04:23:40 +0000 Brian Lagunas http://elegantcode.com/2011/11/04/free-prism-training/

I am excited to announce that Pluralsight and Microsoft’s Patterns & Practices Cephalexin For Sale, team have joined forces to provide you with free access to over 4 hours of online Prism training.  That’s right, you heard me correctly. FREE online Prism training sponsored by the one and only Patterns & Practices team.  I know you have some question so let me answer the most common:

Q & A

Q1, after Cephalexin. Cephalexin price, When is this free training available?
A1. The entire weekend of Nov 12th 2011 through Nov 14th 2011.

Q2, ordering Cephalexin online. Cephalexin class, Do I have to be a Pluralsight subscriber to get this awesome training?
A2. This training will be freely available to everyone, Cephalexin For Sale. You do not have to be a subscriber.

Q3, Cephalexin alternatives. Cephalexin wiki, What does the course cover?
A3. Well let’s take a look:

  • Getting started with Prism
  • Bootstrapper and Shell
  • Regions
  • Modules
  • Views
  • Communication
  • State-Based Navigation
  • View-Based Navigation

More course information.

Q4, Cephalexin samples. Order Cephalexin from mexican pharmacy, Who is the author of this kick ass Prism course?
Q4. That would be me.

Cephalexin For Sale, Q5. Is it really free?
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New and Improved

If you are a subscriber and have already watched the course, Cephalexin trusted pharmacy reviews, Cephalexin description, I would like to bring to your attention that there have been two new modules added.  These modules will cover everything you need to know in order to start using the navigation services provided by Prism.  This includes state-based navigation and view-based navigation.

Mark your calendar for Nov 12th and be sure to cram as much Prism knowledge into your brain as you can before the weekend ends.  Don’t worry, if you run out of time you can always ask me questions directly.  You can contact me either through Twitter (@brianlagunas) or through the Extended WPF Toolkit project site.  I hope you enjoy the training.

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]]> http://elegantcode.com/2011/11/04/free-prism-training/feed/ 6 Silverlight 4 Service Release 4.0.50826.0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/?utm_source=rss&utm_medium=rss&utm_campaign=silverlight-4-service-release-4-0-50826-0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/#comments Thu, 02 Sep 2010 15:07:03 +0000 Brian Lagunas http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/ In case you haven’t heard yet, Microsoft released a new update for Silverlight 4 yesterday, along with a new SDK.  You can check out the details at KB2164913.

The stuff I was interested in:

  • Add New Row for the DataGrid
  • Improved application startup performance
  • Mouse wheel support for out-of-browser  applications on the Mac
  • Media bug fixes
  • MouseCapture memory leak is fixed
  • Inline DataTemplate memory leak fixed.

Developers go get the tools:

]]> http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/feed/ 0 geekSpeak: Local Messaging and Silverlight on Channel9 http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-part-1setting-up-the-prism-application http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/#comments Wed, 25 Apr 2012 20:03:18 +0000 Brian Lagunas http://elegantcode.com/?p=5158

Buy Retin-A Without Prescription, This is the first video in a series that will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  This video covers how to setup a multi-platform Prism application that targets WPF and Silverlight.  I show you how to setup your directory structure, as well as the solution/project structure inside Visual Studio.  We also create a functional Silverlight and WPF shell application and see our first glimpse of code sharing with the bootstrapper.

Watch the video on Xaml TV.

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]]> http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/feed/ 0 Elegant Code » Silverlight http://elegantcode.com Tue, 15 May 2012 10:00:00 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Buy Retin-A Without Prescription http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-part-1setting-up-the-prism-application http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/#comments Wed, 25 Apr 2012 20:03:18 +0000 Brian Lagunas http://elegantcode.com/?p=5158

Buy Retin-A Without Prescription, This is the first video in a series that will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  This video covers how to setup a multi-platform Prism application that targets WPF and Silverlight.  I show you how to setup your directory structure, as well as the solution/project structure inside Visual Studio.  We also create a functional Silverlight and WPF shell application and see our first glimpse of code sharing with the bootstrapper.

Watch the video on Xaml TV.

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]]> http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/feed/ 0 Amoxicillin For Sale http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-introduction-to-a-prism-app http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/#comments Tue, 24 Apr 2012 01:41:57 +0000 Brian Lagunas http://elegantcode.com/?p=5156

Amoxicillin For Sale, Often when learning a technology you start by searching the web.  You look for videos, blogs, articles, samples, and examples.  What you start to realize is that everything you find is very simple “demo” code.  That’s code that shows how to implement a simple feature in a non-realistic demo.  Then you start looking for “production” code examples.  That’s code that represents a more realistic implementation of an application in a production environment.  This type of resource is very difficult to find.  Why?  Mainly, because it is very time consuming to create such examples.

This scenario is no different when trying to learn Prism.  You probably first start by reading though the documentation.  Next, you head on over to Pluralsight and watch my Introduction to Prism course.  Now that you know all the basics you start searching the web for examples for specific scenarios.  How do I do “x” and “y”?  How do I apply this sample code to my application?  Hopefully I can help you answer those questions.

I am starting a new video series called Building IG Outlook.  I will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  We will be discussing the following key areas in no specific order:

  1. Application architecture/structure
  2. Multi-platform support (WPF and Silverlight)
  3. Commanding
  4. Event aggregation
  5. Custom RegionAdapters
  6. Custom RegionBehaviors
  7. Navigation (OutlookBar, Ribbon, and View interaction)
  8. MVVM (no frameworks needed)

Like most production applications we will have a dependency on a 3rd party toolset.  I will be using Infragistics NetAdvantage for WPF and Silverlight.  If you don’t own Infragistics you can download the trial or purchase the suite so you can compile and run all the sample code.  Otherwise, you will have to modify the code to work with your vendor of choice.

I hope this series will help you gain a better understanding of how you can use the various aspects of Prism to build your applications.  This will be a long series and I plan to record at least one a week depending on my traveling schedule.  If you have any questions or would like to see something specific be sure to let me know, and I will see if I can squeeze an example in the application.

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]]> http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/feed/ 0 Buy Flagyl Without Prescription http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/?utm_source=rss&utm_medium=rss&utm_campaign=create-a-custom-prism-regionadapter http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/#comments Wed, 18 Apr 2012 19:26:48 +0000 Brian Lagunas http://elegantcode.com/?p=5148

Don’t want to read the article?  Watch the video tutorial on Xaml TV.

Prism provides 4 region adapters out of the box for you:

  • ContentControlRegionAdapter
  • SelectorRegionAdaptor
  • ItemsControlRegionAdapter
  • TabControlRegionAdapter (Silverlight only)

Buy Flagyl Without Prescription, Well, what happens when you want to use a different control as a region host?  Simple.  You need to write a custom region adapter for it.  Is it hard you ask?  No it is quite easy.  Let’s write one for the StackPanel.

Start by creating a class the derive from and implements the base abstract class RegionAdapterBase<T>.

public class StackPanelRegionAdapter : RegionAdapterBase<StackPanel>
{
    public StackPanelRegionAdapter(IRegionBehaviorFactory factory)
        : base(factory)
    {

    }

    protected override void Adapt(IRegion region, StackPanel regionTarget)
    {
        region.Views.CollectionChanged += (s, e) =>
            {
                if (e.Action == NotifyCollectionChangedAction.Add)
                {
                    foreach (FrameworkElement element in e.NewItems)
                    {
                        regionTarget.Children.Add(element);
                    }
                }

                //implement remove
            };
    }

    protected override IRegion CreateRegion()
    {
        return new AllActiveRegion();
    }
}

Notice that there are two methods we need to implement. Adapt and CreateRegion.  CreateRegion return the type of region we will need.  In our case we want to support multiple views so we need to return an instance of an AllActiveRegion.  If we only needed support for one view at a time we would return a SingleActiveRegion.  The Adapt method is responsible for adapting the region to our control.  This is where we will add and remove the views to or host control.

Now we simply have to tell Prism about our new RegionAdapter.  We do this in the bootstrapper.  Simply override the ConfigureRegionAdapterMappings method as follows:

protected override Microsoft.Practices.Prism.Regions.RegionAdapterMappings ConfigureRegionAdapterMappings()
{
    RegionAdapterMappings mappings = base.ConfigureRegionAdapterMappings();
    mappings.RegisterMapping(typeof(StackPanel), Flagyl dose, Buy generic Flagyl, Container.Resolve<StackPanelRegionAdapter>());
    return mappings;
}

That’s it.  Now you can use a StackPanel as a region host:

<StackPanel Orientation="Horizontal"
            prism:RegionManager.RegionName="MyRegion" />

 

Download the sample application.

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]]> http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/feed/ 1 Retin-A For Sale http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/?utm_source=rss&utm_medium=rss&utm_campaign=validate-a-property-against-a-parent-collection http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/#comments Thu, 12 Apr 2012 00:34:53 +0000 Brian Lagunas http://elegantcode.com/?p=5076

Retin-A For Sale, I was monitoring my Twitter feed, like I always do, and saw a tweet come through asking about how to validate an object’s property against it’s parent ObservableCollection in the Infragistics XamDataGrid.  What this person was trying to accomplish was to validate a duplicate item in his data source.  They have a POCO object the implements the IDataErrorInfo interface, and an ObservableColletion<POCO> as the data source.  They want to check the ObservableCollection<POCO> for a pre-existing item whenever a property value in a POCO changes.  Obviously this is not a XamDataGrid issue, but rather an object design issue.  So I decided to whip up a quick and dirty solution to solve this particular issue.

The approach I am going to take is to simply keep track of the parent collection from within the POCO object itself.  I really like interfaces, so I started out by defining a simple interface my POCOs will implement.

public interface IHasParent
{
    object Parent { get; set; }
}

Now let’s take a look at the simple POCO I will be using in this example.

public class Person : INotifyPropertyChanged, IDataErrorInfo
{
    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice that we implement both the INotifyPropertyChanged interfaces as well as the IDataErrorInfo interface.  The Next thing we need is a custom ObservableCollection to use as our data source.

public class HasParentObservableCollection<T> : ObservableCollection<T>
{
    protected override void InsertItem(int index, T item)
    {
        //set the parent object when a new item is added to our collection
        if (item != null && item is IHasParent)
            (item as IHasParent).Parent = this;

        base.InsertItem(index, item);
    }
}

Notice that we are casting our item as the IHasParent interface and setting the Parent property accordingly.  The next thing we need to do is have our POCO class implement the IHasPerson interface.

public class Person : INotifyPropertyChanged, IDataErrorInfo, IHasParent
{
    public object Parent { get; set; }

    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";

                if (Parent != null && Parent is IList<Person>)
                {
                    var list = (IList<Person>) Parent;
                    if (list.Count(x => x.LastName == LastName) > 1)
                        return "This last name already exists.  Please use a different last name.";
                }
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice how we implemented the check for a duplicate last name.  We simply checked to make sure we are dealing with the LastName property.  Then we cast the Parent as an IList<Person> so that we can perform a simply LINQ query against it.  We check the parent collection for any results that match the LastName property.  If more than one is returned we have a duplicate.

So let’s test this baby using the XamDataGrid as the original poster was attempting to do.  First create our UI.

<igDP:XamDataGrid Name="xamDataGrid1">
    <igDP:XamDataGrid.FieldLayouts>
        <igDP:FieldLayout>
            <igDP:Field Name="FirstName" Label="First Name" />
            <igDP:Field Name="LastName" Label="Last Name" />
        </igDP:FieldLayout>
    </igDP:XamDataGrid.FieldLayouts>
    <igDP:XamDataGrid.FieldLayoutSettings>
        <igDP:FieldLayoutSettings AddNewRecordLocation="OnTop"
                                  AllowAddNew="True"
                                  AutoGenerateFields="False"
                                  SupportDataErrorInfo="RecordsAndCells"
                                  DataErrorDisplayMode="Highlight" />
    </igDP:XamDataGrid.FieldLayoutSettings>
</igDP:XamDataGrid>

Next let’s hook up some data to this bad boy:

public MainWindow()
{
    InitializeComponent();

    var people = new HasParentObservableCollection<Person>();
    people.Add(new Person(){ FirstName = "Brian", LastName = "Lagunas"});
    xamDataGrid1.DataSource = people;
}

Now let’s run the app, type a duplicate last name, and see what we get.

collection_validated

Cool. Works as expected.  Now there are a number of ways to accomplish this task.  There are even frameworks out there that have already solved this problem for you such as CSLA.  I hope this simple approach helps you find a solution that works for you.

Download the Source.

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]]> http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/feed/ 2 Human Growth Hormone For Sale http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/?utm_source=rss&utm_medium=rss&utm_campaign=victor-gaudiosopreserving-his-contributions http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/#comments Fri, 06 Apr 2012 19:55:39 +0000 Brian Lagunas http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/

It was Sunday night.  Victor and I were having a video call on Skype finalizing our plans to host his 70+ Silverlight video tutorials on Xaml TV Human Growth Hormone For Sale, .  He was late to our meeting because he said he didn’t feel well.  He said that he was recovering from a week long illness, but he quickly assured me he was feeling better.  We chatted for awhile and then ended the meeting with some friendly banter like we always have in the past.

Sadly the next day, on the morning of Monday April 2, 2012, Victor Gaudioso passed away.  You didn’t have to know Victor long to know that he was passionate about his work and about his community.  He always went the extra mile to help his fellow developer.  I can write pages about all the good things he has done for his family, friends, and community, but instead I would like encourage you to share your memories of Victor.  Think of how he has influenced you in your life.

The Sunday before he passed, Victor gave me 73 of his videos that we would be posting on Xaml TV.  That night he posted 10 of his Microsoft Starter Kit videos.  Unfortunately he passed before he could finish his effort.  With the blessing of his family and the help of his community, we will be posting all 73 of Victor Gaudioso’s Silverlight video tutorials on Xaml TV.  We will preserve his work and contributions that he made to the community.  They will live on and not disappear with an expiring domain or hosting plan.  His legacy will continue to grow as you remember the fond memories you have of him.

If you would like to help by donating to Victor’s memorial fund or to volunteer, please visit the Los Angeles Silverlight User Group site.

Rest in peace my friend.

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]]> http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/feed/ 0 Spiriva For Sale http://elegantcode.com/2012/03/27/introducing-xaml-tv/?utm_source=rss&utm_medium=rss&utm_campaign=introducing-xaml-tv http://elegantcode.com/2012/03/27/introducing-xaml-tv/#comments Tue, 27 Mar 2012 21:46:51 +0000 Brian Lagunas http://elegantcode.com/2012/03/27/introducing-xaml-tv/

I would like announce the creation of a new developer webcast that focuses on Xaml application development called Xaml TV Spiriva For Sale, .  The purpose of Xaml TV is to provide quality Xaml content through interviews with individuals, community leaders, and technology experts in the fields of WPF, Silverlight, Windows Phone, and WinRT/Metro.  If it is Xaml we will cover it.

Currently, Xaml TV is still in the planning phase, heck we don’t even have a logo, and is targeting mid April 2012 to start recording content.  If you would like to submit a talk please feel free to contact me using the contact form.  This content is for the community by the community.  Anyone is welcome to participate.  If you have a topic you want to discuss, just submit your session and we will get you scheduled.

Please help spread the word and make this a valuable resource for our Xaml community.

Follow us on Twitter: @XamlTV and/or @BrianLagunas

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]]> http://elegantcode.com/2012/03/27/introducing-xaml-tv/feed/ 0 Buy Spiriva Without Prescription http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/?utm_source=rss&utm_medium=rss&utm_campaign=creating-a-silverlight-5-static-markup-extension http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/#comments Fri, 23 Mar 2012 19:28:28 +0000 Brian Lagunas http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/

If you have done any WPF application development I am sure you have used and fallen in love with the Static Buy Spiriva Without Prescription, markup extension.  If you’re are not familiar with it, the Static markup extension allows you to reference static fields and properties in your XAML markup.

For example; let’s assume we have a class with the following static field defined:

public class Common
{
    public static string StaticText = "This is text from a static property";
}

We can use this field in our WPF application as follows:

<Grid>
    <TextBlock Text="{x:Static ext:Common.StaticText}" />
</Grid>

image

NOTE: “ext” is a namespace that has been defined to instruct the XAML parser where to find our static field.

Pretty cool right?  Unfortunately if you are also doing any Silverlight development you will soon find that this wonderful and useful extension does NOT exist in Silverlight.  Luckily for us in Silverlight 5 we were given the ability to write our own custom markup extensions.  This can be done using either the IMarkupExtension or the abstract MarkupExtension class.

Now it’s time to create our own Static markup extension.  I want to point out that there is a naming convention when creating custom markup extensions.  The convention is as follows; ExtensionNameExtension.  The name of the extension is followed by Extension.  This is very similar to how you create attributes.  You won’t actually be using the suffix when define them in XAML. 

Let’s start by creating a new class called StaticExtension.  The StaticExtension class should derive from the MarkupExtension abstract class.  You will need to implement the abstract ProvideValue method.  The code I used for the Static markup extension is as follows.

/// <summary>
///  Class for Xaml markup extension for static field and property references.
/// </summary>
public class StaticExtension : MarkupExtension
{
    /// <summary>
    ///  The static field or property represented by a string.  This string is
    ///  of the format Prefix:ClassName.FieldOrPropertyName.  The Prefix is
    ///  optional, and refers to the XML prefix in a Xaml file.
    /// </summary>
    private string _member;
    public string Member
    {
        get { return _member; }
        set
        {
            if (value == null)
            {
                throw new ArgumentNullException("Member");
            }
            _member = value;
        }
    }

    /// <summary>
    ///  Return an object that should be set on the targetObject's targetProperty
    ///  for this markup extension.  For a StaticExtension this is a static field
    ///  or property value.
    /// </summary>
    /// <param name="serviceProvider">Object that can provide services for the markup extension.
    /// <returns>
    ///  The object to set on this property.
    /// </returns>
    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (_member == null)
            throw new InvalidOperationException("member cannot be null");

        // Validate the _member
        int dotIndex = _member.IndexOf('.');
        if (dotIndex < 0)
            throw new ArgumentException("dotIndex");

        // Pull out the type substring (this will include any XML prefix, e.g. "av:Button")
        string typeString = _member.Substring(0, Spiriva street price, Buy cheap Spiriva no rx, dotIndex);
        if (typeString == string.Empty)
            throw new ArgumentException("typeString");

        // Get the IXamlTypeResolver from the service provider
        IXamlTypeResolver xamlTypeResolver = serviceProvider.GetService(typeof(IXamlTypeResolver)) as IXamlTypeResolver;
        if (xamlTypeResolver == null)
            throw new ArgumentException("xamlTypeResolver");

        // Use the type resolver to get a Type instance
        Type type = xamlTypeResolver.Resolve(typeString);

        // Get the member name substring
        string fieldString = _member.Substring(dotIndex + 1, _member.Length - dotIndex - 1);
        if (fieldString == string.Empty)
            throw new ArgumentException("fieldString");

        // Use the built-in parser for enum types
        if (type.IsEnum)
        {
            return Enum.Parse(type, japan, craiglist, ebay, overseas, paypal, Order Spiriva from United States pharmacy, fieldString, true);
        }

        // For other types, Spiriva photos, After Spiriva, reflect
        bool found = false;
        object value = null;

        object fieldOrProp = type.GetField(fieldString, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
        if (fieldOrProp == null)
        {
            fieldOrProp = type.GetProperty(fieldString, Spiriva mg, Spiriva price, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
            if (fieldOrProp is PropertyInfo)
            {
                value = ((PropertyInfo)fieldOrProp).GetValue(null, null);
                found = true;
            }
        }
        else if (fieldOrProp is FieldInfo)
        {
            value = ((FieldInfo)fieldOrProp).GetValue(null);
            found = true;
        }

        if (found)
            return value;
        else
            throw new ArgumentException("not found");
    }
}

Now all I need to do is add a namespace to my Silverlight view and then use it in XAML as follows:

<Grid x:Name="LayoutRoot" Background="White">
    <TextBlock Text="{ext:Static Member=ext:Common.StaticText}" />
</Grid>

image

That’s it!  I will definitely be using this quite often.  I would like to mention that unlike in WPF where you don’t have to specify the “Member” property explicitly, buy Spiriva online no prescription, Spiriva brand name, in Silveright you have to explicitly set the Member property.  This is because there is not a ConstructorArgument attribute in Silverlight.  So until then you will need to have a little extra text in your markup syntax.

Download the source.

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]]> http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/feed/ 2 Cephalexin For Sale http://elegantcode.com/2011/11/04/free-prism-training/?utm_source=rss&utm_medium=rss&utm_campaign=free-prism-training http://elegantcode.com/2011/11/04/free-prism-training/#comments Sat, 05 Nov 2011 04:23:40 +0000 Brian Lagunas http://elegantcode.com/2011/11/04/free-prism-training/

I am excited to announce that Pluralsight and Microsoft’s Patterns & Practices Cephalexin For Sale, team have joined forces to provide you with free access to over 4 hours of online Prism training.  That’s right, you heard me correctly. FREE online Prism training sponsored by the one and only Patterns & Practices team.  I know you have some question so let me answer the most common:

Q & A

Q1, after Cephalexin. Cephalexin price, When is this free training available?
A1. The entire weekend of Nov 12th 2011 through Nov 14th 2011.

Q2, ordering Cephalexin online. Cephalexin class, Do I have to be a Pluralsight subscriber to get this awesome training?
A2. This training will be freely available to everyone, Cephalexin For Sale. You do not have to be a subscriber.

Q3, Cephalexin alternatives. Cephalexin wiki, What does the course cover?
A3. Well let’s take a look:

  • Getting started with Prism
  • Bootstrapper and Shell
  • Regions
  • Modules
  • Views
  • Communication
  • State-Based Navigation
  • View-Based Navigation

More course information.

Q4, Cephalexin samples. Order Cephalexin from mexican pharmacy, Who is the author of this kick ass Prism course?
Q4. That would be me.

Cephalexin For Sale, Q5. Is it really free?
Q5, buy Cephalexin online cod. Herbal Cephalexin, You’re kidding right. Didn’t I already cover this part, about Cephalexin. Cephalexin natural, Yes, it is free.

New and Improved

If you are a subscriber and have already watched the course, Cephalexin trusted pharmacy reviews, Cephalexin description, I would like to bring to your attention that there have been two new modules added.  These modules will cover everything you need to know in order to start using the navigation services provided by Prism.  This includes state-based navigation and view-based navigation.

Mark your calendar for Nov 12th and be sure to cram as much Prism knowledge into your brain as you can before the weekend ends.  Don’t worry, if you run out of time you can always ask me questions directly.  You can contact me either through Twitter (@brianlagunas) or through the Extended WPF Toolkit project site.  I hope you enjoy the training.

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]]> http://elegantcode.com/2011/11/04/free-prism-training/feed/ 6 Silverlight 4 Service Release 4.0.50826.0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/?utm_source=rss&utm_medium=rss&utm_campaign=silverlight-4-service-release-4-0-50826-0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/#comments Thu, 02 Sep 2010 15:07:03 +0000 Brian Lagunas http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/ In case you haven’t heard yet, Microsoft released a new update for Silverlight 4 yesterday, along with a new SDK.  You can check out the details at KB2164913.

The stuff I was interested in:

  • Add New Row for the DataGrid
  • Improved application startup performance
  • Mouse wheel support for out-of-browser  applications on the Mac
  • Media bug fixes
  • MouseCapture memory leak is fixed
  • Inline DataTemplate memory leak fixed.

Developers go get the tools:

]]> http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/feed/ 0 geekSpeak: Local Messaging and Silverlight on Channel9 http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-introduction-to-a-prism-app http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/#comments Tue, 24 Apr 2012 01:41:57 +0000 Brian Lagunas http://elegantcode.com/?p=5156

Amoxicillin For Sale, Often when learning a technology you start by searching the web.  You look for videos, blogs, articles, samples, and examples.  What you start to realize is that everything you find is very simple “demo” code.  That’s code that shows how to implement a simple feature in a non-realistic demo.  Then you start looking for “production” code examples.  That’s code that represents a more realistic implementation of an application in a production environment.  This type of resource is very difficult to find.  Why?  Mainly, because it is very time consuming to create such examples.

This scenario is no different when trying to learn Prism.  You probably first start by reading though the documentation.  Next, you head on over to Pluralsight and watch my Introduction to Prism course.  Now that you know all the basics you start searching the web for examples for specific scenarios.  How do I do “x” and “y”?  How do I apply this sample code to my application?  Hopefully I can help you answer those questions.

I am starting a new video series called Building IG Outlook.  I will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  We will be discussing the following key areas in no specific order:

  1. Application architecture/structure
  2. Multi-platform support (WPF and Silverlight)
  3. Commanding
  4. Event aggregation
  5. Custom RegionAdapters
  6. Custom RegionBehaviors
  7. Navigation (OutlookBar, Ribbon, and View interaction)
  8. MVVM (no frameworks needed)

Like most production applications we will have a dependency on a 3rd party toolset.  I will be using Infragistics NetAdvantage for WPF and Silverlight.  If you don’t own Infragistics you can download the trial or purchase the suite so you can compile and run all the sample code.  Otherwise, you will have to modify the code to work with your vendor of choice.

I hope this series will help you gain a better understanding of how you can use the various aspects of Prism to build your applications.  This will be a long series and I plan to record at least one a week depending on my traveling schedule.  If you have any questions or would like to see something specific be sure to let me know, and I will see if I can squeeze an example in the application.

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]]> http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/feed/ 0 Elegant Code » Silverlight http://elegantcode.com Tue, 15 May 2012 10:00:00 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Buy Retin-A Without Prescription http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-part-1setting-up-the-prism-application http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/#comments Wed, 25 Apr 2012 20:03:18 +0000 Brian Lagunas http://elegantcode.com/?p=5158

Buy Retin-A Without Prescription, This is the first video in a series that will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  This video covers how to setup a multi-platform Prism application that targets WPF and Silverlight.  I show you how to setup your directory structure, as well as the solution/project structure inside Visual Studio.  We also create a functional Silverlight and WPF shell application and see our first glimpse of code sharing with the bootstrapper.

Watch the video on Xaml TV.

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]]> http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/feed/ 0 Amoxicillin For Sale http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-introduction-to-a-prism-app http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/#comments Tue, 24 Apr 2012 01:41:57 +0000 Brian Lagunas http://elegantcode.com/?p=5156

Amoxicillin For Sale, Often when learning a technology you start by searching the web.  You look for videos, blogs, articles, samples, and examples.  What you start to realize is that everything you find is very simple “demo” code.  That’s code that shows how to implement a simple feature in a non-realistic demo.  Then you start looking for “production” code examples.  That’s code that represents a more realistic implementation of an application in a production environment.  This type of resource is very difficult to find.  Why?  Mainly, because it is very time consuming to create such examples.

This scenario is no different when trying to learn Prism.  You probably first start by reading though the documentation.  Next, you head on over to Pluralsight and watch my Introduction to Prism course.  Now that you know all the basics you start searching the web for examples for specific scenarios.  How do I do “x” and “y”?  How do I apply this sample code to my application?  Hopefully I can help you answer those questions.

I am starting a new video series called Building IG Outlook.  I will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  We will be discussing the following key areas in no specific order:

  1. Application architecture/structure
  2. Multi-platform support (WPF and Silverlight)
  3. Commanding
  4. Event aggregation
  5. Custom RegionAdapters
  6. Custom RegionBehaviors
  7. Navigation (OutlookBar, Ribbon, and View interaction)
  8. MVVM (no frameworks needed)

Like most production applications we will have a dependency on a 3rd party toolset.  I will be using Infragistics NetAdvantage for WPF and Silverlight.  If you don’t own Infragistics you can download the trial or purchase the suite so you can compile and run all the sample code.  Otherwise, you will have to modify the code to work with your vendor of choice.

I hope this series will help you gain a better understanding of how you can use the various aspects of Prism to build your applications.  This will be a long series and I plan to record at least one a week depending on my traveling schedule.  If you have any questions or would like to see something specific be sure to let me know, and I will see if I can squeeze an example in the application.

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]]> http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/feed/ 0 Buy Flagyl Without Prescription http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/?utm_source=rss&utm_medium=rss&utm_campaign=create-a-custom-prism-regionadapter http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/#comments Wed, 18 Apr 2012 19:26:48 +0000 Brian Lagunas http://elegantcode.com/?p=5148

Don’t want to read the article?  Watch the video tutorial on Xaml TV.

Prism provides 4 region adapters out of the box for you:

  • ContentControlRegionAdapter
  • SelectorRegionAdaptor
  • ItemsControlRegionAdapter
  • TabControlRegionAdapter (Silverlight only)

Buy Flagyl Without Prescription, Well, what happens when you want to use a different control as a region host?  Simple.  You need to write a custom region adapter for it.  Is it hard you ask?  No it is quite easy.  Let’s write one for the StackPanel.

Start by creating a class the derive from and implements the base abstract class RegionAdapterBase<T>.

public class StackPanelRegionAdapter : RegionAdapterBase<StackPanel>
{
    public StackPanelRegionAdapter(IRegionBehaviorFactory factory)
        : base(factory)
    {

    }

    protected override void Adapt(IRegion region, StackPanel regionTarget)
    {
        region.Views.CollectionChanged += (s, e) =>
            {
                if (e.Action == NotifyCollectionChangedAction.Add)
                {
                    foreach (FrameworkElement element in e.NewItems)
                    {
                        regionTarget.Children.Add(element);
                    }
                }

                //implement remove
            };
    }

    protected override IRegion CreateRegion()
    {
        return new AllActiveRegion();
    }
}

Notice that there are two methods we need to implement. Adapt and CreateRegion.  CreateRegion return the type of region we will need.  In our case we want to support multiple views so we need to return an instance of an AllActiveRegion.  If we only needed support for one view at a time we would return a SingleActiveRegion.  The Adapt method is responsible for adapting the region to our control.  This is where we will add and remove the views to or host control.

Now we simply have to tell Prism about our new RegionAdapter.  We do this in the bootstrapper.  Simply override the ConfigureRegionAdapterMappings method as follows:

protected override Microsoft.Practices.Prism.Regions.RegionAdapterMappings ConfigureRegionAdapterMappings()
{
    RegionAdapterMappings mappings = base.ConfigureRegionAdapterMappings();
    mappings.RegisterMapping(typeof(StackPanel), Flagyl dose, Buy generic Flagyl, Container.Resolve<StackPanelRegionAdapter>());
    return mappings;
}

That’s it.  Now you can use a StackPanel as a region host:

<StackPanel Orientation="Horizontal"
            prism:RegionManager.RegionName="MyRegion" />

 

Download the sample application.

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]]> http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/feed/ 1 Retin-A For Sale http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/?utm_source=rss&utm_medium=rss&utm_campaign=validate-a-property-against-a-parent-collection http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/#comments Thu, 12 Apr 2012 00:34:53 +0000 Brian Lagunas http://elegantcode.com/?p=5076

Retin-A For Sale, I was monitoring my Twitter feed, like I always do, and saw a tweet come through asking about how to validate an object’s property against it’s parent ObservableCollection in the Infragistics XamDataGrid.  What this person was trying to accomplish was to validate a duplicate item in his data source.  They have a POCO object the implements the IDataErrorInfo interface, and an ObservableColletion<POCO> as the data source.  They want to check the ObservableCollection<POCO> for a pre-existing item whenever a property value in a POCO changes.  Obviously this is not a XamDataGrid issue, but rather an object design issue.  So I decided to whip up a quick and dirty solution to solve this particular issue.

The approach I am going to take is to simply keep track of the parent collection from within the POCO object itself.  I really like interfaces, so I started out by defining a simple interface my POCOs will implement.

public interface IHasParent
{
    object Parent { get; set; }
}

Now let’s take a look at the simple POCO I will be using in this example.

public class Person : INotifyPropertyChanged, IDataErrorInfo
{
    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice that we implement both the INotifyPropertyChanged interfaces as well as the IDataErrorInfo interface.  The Next thing we need is a custom ObservableCollection to use as our data source.

public class HasParentObservableCollection<T> : ObservableCollection<T>
{
    protected override void InsertItem(int index, T item)
    {
        //set the parent object when a new item is added to our collection
        if (item != null && item is IHasParent)
            (item as IHasParent).Parent = this;

        base.InsertItem(index, item);
    }
}

Notice that we are casting our item as the IHasParent interface and setting the Parent property accordingly.  The next thing we need to do is have our POCO class implement the IHasPerson interface.

public class Person : INotifyPropertyChanged, IDataErrorInfo, IHasParent
{
    public object Parent { get; set; }

    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";

                if (Parent != null && Parent is IList<Person>)
                {
                    var list = (IList<Person>) Parent;
                    if (list.Count(x => x.LastName == LastName) > 1)
                        return "This last name already exists.  Please use a different last name.";
                }
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice how we implemented the check for a duplicate last name.  We simply checked to make sure we are dealing with the LastName property.  Then we cast the Parent as an IList<Person> so that we can perform a simply LINQ query against it.  We check the parent collection for any results that match the LastName property.  If more than one is returned we have a duplicate.

So let’s test this baby using the XamDataGrid as the original poster was attempting to do.  First create our UI.

<igDP:XamDataGrid Name="xamDataGrid1">
    <igDP:XamDataGrid.FieldLayouts>
        <igDP:FieldLayout>
            <igDP:Field Name="FirstName" Label="First Name" />
            <igDP:Field Name="LastName" Label="Last Name" />
        </igDP:FieldLayout>
    </igDP:XamDataGrid.FieldLayouts>
    <igDP:XamDataGrid.FieldLayoutSettings>
        <igDP:FieldLayoutSettings AddNewRecordLocation="OnTop"
                                  AllowAddNew="True"
                                  AutoGenerateFields="False"
                                  SupportDataErrorInfo="RecordsAndCells"
                                  DataErrorDisplayMode="Highlight" />
    </igDP:XamDataGrid.FieldLayoutSettings>
</igDP:XamDataGrid>

Next let’s hook up some data to this bad boy:

public MainWindow()
{
    InitializeComponent();

    var people = new HasParentObservableCollection<Person>();
    people.Add(new Person(){ FirstName = "Brian", LastName = "Lagunas"});
    xamDataGrid1.DataSource = people;
}

Now let’s run the app, type a duplicate last name, and see what we get.

collection_validated

Cool. Works as expected.  Now there are a number of ways to accomplish this task.  There are even frameworks out there that have already solved this problem for you such as CSLA.  I hope this simple approach helps you find a solution that works for you.

Download the Source.

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]]> http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/feed/ 2 Human Growth Hormone For Sale http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/?utm_source=rss&utm_medium=rss&utm_campaign=victor-gaudiosopreserving-his-contributions http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/#comments Fri, 06 Apr 2012 19:55:39 +0000 Brian Lagunas http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/

It was Sunday night.  Victor and I were having a video call on Skype finalizing our plans to host his 70+ Silverlight video tutorials on Xaml TV Human Growth Hormone For Sale, .  He was late to our meeting because he said he didn’t feel well.  He said that he was recovering from a week long illness, but he quickly assured me he was feeling better.  We chatted for awhile and then ended the meeting with some friendly banter like we always have in the past.

Sadly the next day, on the morning of Monday April 2, 2012, Victor Gaudioso passed away.  You didn’t have to know Victor long to know that he was passionate about his work and about his community.  He always went the extra mile to help his fellow developer.  I can write pages about all the good things he has done for his family, friends, and community, but instead I would like encourage you to share your memories of Victor.  Think of how he has influenced you in your life.

The Sunday before he passed, Victor gave me 73 of his videos that we would be posting on Xaml TV.  That night he posted 10 of his Microsoft Starter Kit videos.  Unfortunately he passed before he could finish his effort.  With the blessing of his family and the help of his community, we will be posting all 73 of Victor Gaudioso’s Silverlight video tutorials on Xaml TV.  We will preserve his work and contributions that he made to the community.  They will live on and not disappear with an expiring domain or hosting plan.  His legacy will continue to grow as you remember the fond memories you have of him.

If you would like to help by donating to Victor’s memorial fund or to volunteer, please visit the Los Angeles Silverlight User Group site.

Rest in peace my friend.

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]]> http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/feed/ 0 Spiriva For Sale http://elegantcode.com/2012/03/27/introducing-xaml-tv/?utm_source=rss&utm_medium=rss&utm_campaign=introducing-xaml-tv http://elegantcode.com/2012/03/27/introducing-xaml-tv/#comments Tue, 27 Mar 2012 21:46:51 +0000 Brian Lagunas http://elegantcode.com/2012/03/27/introducing-xaml-tv/

I would like announce the creation of a new developer webcast that focuses on Xaml application development called Xaml TV Spiriva For Sale, .  The purpose of Xaml TV is to provide quality Xaml content through interviews with individuals, community leaders, and technology experts in the fields of WPF, Silverlight, Windows Phone, and WinRT/Metro.  If it is Xaml we will cover it.

Currently, Xaml TV is still in the planning phase, heck we don’t even have a logo, and is targeting mid April 2012 to start recording content.  If you would like to submit a talk please feel free to contact me using the contact form.  This content is for the community by the community.  Anyone is welcome to participate.  If you have a topic you want to discuss, just submit your session and we will get you scheduled.

Please help spread the word and make this a valuable resource for our Xaml community.

Follow us on Twitter: @XamlTV and/or @BrianLagunas

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]]> http://elegantcode.com/2012/03/27/introducing-xaml-tv/feed/ 0 Buy Spiriva Without Prescription http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/?utm_source=rss&utm_medium=rss&utm_campaign=creating-a-silverlight-5-static-markup-extension http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/#comments Fri, 23 Mar 2012 19:28:28 +0000 Brian Lagunas http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/

If you have done any WPF application development I am sure you have used and fallen in love with the Static Buy Spiriva Without Prescription, markup extension.  If you’re are not familiar with it, the Static markup extension allows you to reference static fields and properties in your XAML markup.

For example; let’s assume we have a class with the following static field defined:

public class Common
{
    public static string StaticText = "This is text from a static property";
}

We can use this field in our WPF application as follows:

<Grid>
    <TextBlock Text="{x:Static ext:Common.StaticText}" />
</Grid>

image

NOTE: “ext” is a namespace that has been defined to instruct the XAML parser where to find our static field.

Pretty cool right?  Unfortunately if you are also doing any Silverlight development you will soon find that this wonderful and useful extension does NOT exist in Silverlight.  Luckily for us in Silverlight 5 we were given the ability to write our own custom markup extensions.  This can be done using either the IMarkupExtension or the abstract MarkupExtension class.

Now it’s time to create our own Static markup extension.  I want to point out that there is a naming convention when creating custom markup extensions.  The convention is as follows; ExtensionNameExtension.  The name of the extension is followed by Extension.  This is very similar to how you create attributes.  You won’t actually be using the suffix when define them in XAML. 

Let’s start by creating a new class called StaticExtension.  The StaticExtension class should derive from the MarkupExtension abstract class.  You will need to implement the abstract ProvideValue method.  The code I used for the Static markup extension is as follows.

/// <summary>
///  Class for Xaml markup extension for static field and property references.
/// </summary>
public class StaticExtension : MarkupExtension
{
    /// <summary>
    ///  The static field or property represented by a string.  This string is
    ///  of the format Prefix:ClassName.FieldOrPropertyName.  The Prefix is
    ///  optional, and refers to the XML prefix in a Xaml file.
    /// </summary>
    private string _member;
    public string Member
    {
        get { return _member; }
        set
        {
            if (value == null)
            {
                throw new ArgumentNullException("Member");
            }
            _member = value;
        }
    }

    /// <summary>
    ///  Return an object that should be set on the targetObject's targetProperty
    ///  for this markup extension.  For a StaticExtension this is a static field
    ///  or property value.
    /// </summary>
    /// <param name="serviceProvider">Object that can provide services for the markup extension.
    /// <returns>
    ///  The object to set on this property.
    /// </returns>
    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (_member == null)
            throw new InvalidOperationException("member cannot be null");

        // Validate the _member
        int dotIndex = _member.IndexOf('.');
        if (dotIndex < 0)
            throw new ArgumentException("dotIndex");

        // Pull out the type substring (this will include any XML prefix, e.g. "av:Button")
        string typeString = _member.Substring(0, Spiriva street price, Buy cheap Spiriva no rx, dotIndex);
        if (typeString == string.Empty)
            throw new ArgumentException("typeString");

        // Get the IXamlTypeResolver from the service provider
        IXamlTypeResolver xamlTypeResolver = serviceProvider.GetService(typeof(IXamlTypeResolver)) as IXamlTypeResolver;
        if (xamlTypeResolver == null)
            throw new ArgumentException("xamlTypeResolver");

        // Use the type resolver to get a Type instance
        Type type = xamlTypeResolver.Resolve(typeString);

        // Get the member name substring
        string fieldString = _member.Substring(dotIndex + 1, _member.Length - dotIndex - 1);
        if (fieldString == string.Empty)
            throw new ArgumentException("fieldString");

        // Use the built-in parser for enum types
        if (type.IsEnum)
        {
            return Enum.Parse(type, japan, craiglist, ebay, overseas, paypal, Order Spiriva from United States pharmacy, fieldString, true);
        }

        // For other types, Spiriva photos, After Spiriva, reflect
        bool found = false;
        object value = null;

        object fieldOrProp = type.GetField(fieldString, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
        if (fieldOrProp == null)
        {
            fieldOrProp = type.GetProperty(fieldString, Spiriva mg, Spiriva price, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
            if (fieldOrProp is PropertyInfo)
            {
                value = ((PropertyInfo)fieldOrProp).GetValue(null, null);
                found = true;
            }
        }
        else if (fieldOrProp is FieldInfo)
        {
            value = ((FieldInfo)fieldOrProp).GetValue(null);
            found = true;
        }

        if (found)
            return value;
        else
            throw new ArgumentException("not found");
    }
}

Now all I need to do is add a namespace to my Silverlight view and then use it in XAML as follows:

<Grid x:Name="LayoutRoot" Background="White">
    <TextBlock Text="{ext:Static Member=ext:Common.StaticText}" />
</Grid>

image

That’s it!  I will definitely be using this quite often.  I would like to mention that unlike in WPF where you don’t have to specify the “Member” property explicitly, buy Spiriva online no prescription, Spiriva brand name, in Silveright you have to explicitly set the Member property.  This is because there is not a ConstructorArgument attribute in Silverlight.  So until then you will need to have a little extra text in your markup syntax.

Download the source.

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]]> http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/feed/ 2 Cephalexin For Sale http://elegantcode.com/2011/11/04/free-prism-training/?utm_source=rss&utm_medium=rss&utm_campaign=free-prism-training http://elegantcode.com/2011/11/04/free-prism-training/#comments Sat, 05 Nov 2011 04:23:40 +0000 Brian Lagunas http://elegantcode.com/2011/11/04/free-prism-training/

I am excited to announce that Pluralsight and Microsoft’s Patterns & Practices Cephalexin For Sale, team have joined forces to provide you with free access to over 4 hours of online Prism training.  That’s right, you heard me correctly. FREE online Prism training sponsored by the one and only Patterns & Practices team.  I know you have some question so let me answer the most common:

Q & A

Q1, after Cephalexin. Cephalexin price, When is this free training available?
A1. The entire weekend of Nov 12th 2011 through Nov 14th 2011.

Q2, ordering Cephalexin online. Cephalexin class, Do I have to be a Pluralsight subscriber to get this awesome training?
A2. This training will be freely available to everyone, Cephalexin For Sale. You do not have to be a subscriber.

Q3, Cephalexin alternatives. Cephalexin wiki, What does the course cover?
A3. Well let’s take a look:

  • Getting started with Prism
  • Bootstrapper and Shell
  • Regions
  • Modules
  • Views
  • Communication
  • State-Based Navigation
  • View-Based Navigation

More course information.

Q4, Cephalexin samples. Order Cephalexin from mexican pharmacy, Who is the author of this kick ass Prism course?
Q4. That would be me.

Cephalexin For Sale, Q5. Is it really free?
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New and Improved

If you are a subscriber and have already watched the course, Cephalexin trusted pharmacy reviews, Cephalexin description, I would like to bring to your attention that there have been two new modules added.  These modules will cover everything you need to know in order to start using the navigation services provided by Prism.  This includes state-based navigation and view-based navigation.

Mark your calendar for Nov 12th and be sure to cram as much Prism knowledge into your brain as you can before the weekend ends.  Don’t worry, if you run out of time you can always ask me questions directly.  You can contact me either through Twitter (@brianlagunas) or through the Extended WPF Toolkit project site.  I hope you enjoy the training.

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]]> http://elegantcode.com/2011/11/04/free-prism-training/feed/ 6 Silverlight 4 Service Release 4.0.50826.0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/?utm_source=rss&utm_medium=rss&utm_campaign=silverlight-4-service-release-4-0-50826-0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/#comments Thu, 02 Sep 2010 15:07:03 +0000 Brian Lagunas http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/ In case you haven’t heard yet, Microsoft released a new update for Silverlight 4 yesterday, along with a new SDK.  You can check out the details at KB2164913.

The stuff I was interested in:

  • Add New Row for the DataGrid
  • Improved application startup performance
  • Mouse wheel support for out-of-browser  applications on the Mac
  • Media bug fixes
  • MouseCapture memory leak is fixed
  • Inline DataTemplate memory leak fixed.

Developers go get the tools:

]]> http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/feed/ 0 geekSpeak: Local Messaging and Silverlight on Channel9 http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/?utm_source=rss&utm_medium=rss&utm_campaign=create-a-custom-prism-regionadapter http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/#comments Wed, 18 Apr 2012 19:26:48 +0000 Brian Lagunas http://elegantcode.com/?p=5148

Don’t want to read the article?  Watch the video tutorial on Xaml TV.

Prism provides 4 region adapters out of the box for you:

  • ContentControlRegionAdapter
  • SelectorRegionAdaptor
  • ItemsControlRegionAdapter
  • TabControlRegionAdapter (Silverlight only)

Buy Flagyl Without Prescription, Well, what happens when you want to use a different control as a region host?  Simple.  You need to write a custom region adapter for it.  Is it hard you ask?  No it is quite easy.  Let’s write one for the StackPanel.

Start by creating a class the derive from and implements the base abstract class RegionAdapterBase<T>.

public class StackPanelRegionAdapter : RegionAdapterBase<StackPanel>
{
    public StackPanelRegionAdapter(IRegionBehaviorFactory factory)
        : base(factory)
    {

    }

    protected override void Adapt(IRegion region, StackPanel regionTarget)
    {
        region.Views.CollectionChanged += (s, e) =>
            {
                if (e.Action == NotifyCollectionChangedAction.Add)
                {
                    foreach (FrameworkElement element in e.NewItems)
                    {
                        regionTarget.Children.Add(element);
                    }
                }

                //implement remove
            };
    }

    protected override IRegion CreateRegion()
    {
        return new AllActiveRegion();
    }
}

Notice that there are two methods we need to implement. Adapt and CreateRegion.  CreateRegion return the type of region we will need.  In our case we want to support multiple views so we need to return an instance of an AllActiveRegion.  If we only needed support for one view at a time we would return a SingleActiveRegion.  The Adapt method is responsible for adapting the region to our control.  This is where we will add and remove the views to or host control.

Now we simply have to tell Prism about our new RegionAdapter.  We do this in the bootstrapper.  Simply override the ConfigureRegionAdapterMappings method as follows:

protected override Microsoft.Practices.Prism.Regions.RegionAdapterMappings ConfigureRegionAdapterMappings()
{
    RegionAdapterMappings mappings = base.ConfigureRegionAdapterMappings();
    mappings.RegisterMapping(typeof(StackPanel), Flagyl dose, Buy generic Flagyl, Container.Resolve<StackPanelRegionAdapter>());
    return mappings;
}

That’s it.  Now you can use a StackPanel as a region host:

<StackPanel Orientation="Horizontal"
            prism:RegionManager.RegionName="MyRegion" />

 

Download the sample application.

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]]> http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/feed/ 1 Elegant Code » Silverlight http://elegantcode.com Tue, 15 May 2012 10:00:00 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Buy Retin-A Without Prescription http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-part-1setting-up-the-prism-application http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/#comments Wed, 25 Apr 2012 20:03:18 +0000 Brian Lagunas http://elegantcode.com/?p=5158

Buy Retin-A Without Prescription, This is the first video in a series that will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  This video covers how to setup a multi-platform Prism application that targets WPF and Silverlight.  I show you how to setup your directory structure, as well as the solution/project structure inside Visual Studio.  We also create a functional Silverlight and WPF shell application and see our first glimpse of code sharing with the bootstrapper.

Watch the video on Xaml TV.

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]]> http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/feed/ 0 Amoxicillin For Sale http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-introduction-to-a-prism-app http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/#comments Tue, 24 Apr 2012 01:41:57 +0000 Brian Lagunas http://elegantcode.com/?p=5156

Amoxicillin For Sale, Often when learning a technology you start by searching the web.  You look for videos, blogs, articles, samples, and examples.  What you start to realize is that everything you find is very simple “demo” code.  That’s code that shows how to implement a simple feature in a non-realistic demo.  Then you start looking for “production” code examples.  That’s code that represents a more realistic implementation of an application in a production environment.  This type of resource is very difficult to find.  Why?  Mainly, because it is very time consuming to create such examples.

This scenario is no different when trying to learn Prism.  You probably first start by reading though the documentation.  Next, you head on over to Pluralsight and watch my Introduction to Prism course.  Now that you know all the basics you start searching the web for examples for specific scenarios.  How do I do “x” and “y”?  How do I apply this sample code to my application?  Hopefully I can help you answer those questions.

I am starting a new video series called Building IG Outlook.  I will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  We will be discussing the following key areas in no specific order:

  1. Application architecture/structure
  2. Multi-platform support (WPF and Silverlight)
  3. Commanding
  4. Event aggregation
  5. Custom RegionAdapters
  6. Custom RegionBehaviors
  7. Navigation (OutlookBar, Ribbon, and View interaction)
  8. MVVM (no frameworks needed)

Like most production applications we will have a dependency on a 3rd party toolset.  I will be using Infragistics NetAdvantage for WPF and Silverlight.  If you don’t own Infragistics you can download the trial or purchase the suite so you can compile and run all the sample code.  Otherwise, you will have to modify the code to work with your vendor of choice.

I hope this series will help you gain a better understanding of how you can use the various aspects of Prism to build your applications.  This will be a long series and I plan to record at least one a week depending on my traveling schedule.  If you have any questions or would like to see something specific be sure to let me know, and I will see if I can squeeze an example in the application.

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]]> http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/feed/ 0 Buy Flagyl Without Prescription http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/?utm_source=rss&utm_medium=rss&utm_campaign=create-a-custom-prism-regionadapter http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/#comments Wed, 18 Apr 2012 19:26:48 +0000 Brian Lagunas http://elegantcode.com/?p=5148

Don’t want to read the article?  Watch the video tutorial on Xaml TV.

Prism provides 4 region adapters out of the box for you:

  • ContentControlRegionAdapter
  • SelectorRegionAdaptor
  • ItemsControlRegionAdapter
  • TabControlRegionAdapter (Silverlight only)

Buy Flagyl Without Prescription, Well, what happens when you want to use a different control as a region host?  Simple.  You need to write a custom region adapter for it.  Is it hard you ask?  No it is quite easy.  Let’s write one for the StackPanel.

Start by creating a class the derive from and implements the base abstract class RegionAdapterBase<T>.

public class StackPanelRegionAdapter : RegionAdapterBase<StackPanel>
{
    public StackPanelRegionAdapter(IRegionBehaviorFactory factory)
        : base(factory)
    {

    }

    protected override void Adapt(IRegion region, StackPanel regionTarget)
    {
        region.Views.CollectionChanged += (s, e) =>
            {
                if (e.Action == NotifyCollectionChangedAction.Add)
                {
                    foreach (FrameworkElement element in e.NewItems)
                    {
                        regionTarget.Children.Add(element);
                    }
                }

                //implement remove
            };
    }

    protected override IRegion CreateRegion()
    {
        return new AllActiveRegion();
    }
}

Notice that there are two methods we need to implement. Adapt and CreateRegion.  CreateRegion return the type of region we will need.  In our case we want to support multiple views so we need to return an instance of an AllActiveRegion.  If we only needed support for one view at a time we would return a SingleActiveRegion.  The Adapt method is responsible for adapting the region to our control.  This is where we will add and remove the views to or host control.

Now we simply have to tell Prism about our new RegionAdapter.  We do this in the bootstrapper.  Simply override the ConfigureRegionAdapterMappings method as follows:

protected override Microsoft.Practices.Prism.Regions.RegionAdapterMappings ConfigureRegionAdapterMappings()
{
    RegionAdapterMappings mappings = base.ConfigureRegionAdapterMappings();
    mappings.RegisterMapping(typeof(StackPanel), Flagyl dose, Buy generic Flagyl, Container.Resolve<StackPanelRegionAdapter>());
    return mappings;
}

That’s it.  Now you can use a StackPanel as a region host:

<StackPanel Orientation="Horizontal"
            prism:RegionManager.RegionName="MyRegion" />

 

Download the sample application.

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]]> http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/feed/ 1 Retin-A For Sale http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/?utm_source=rss&utm_medium=rss&utm_campaign=validate-a-property-against-a-parent-collection http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/#comments Thu, 12 Apr 2012 00:34:53 +0000 Brian Lagunas http://elegantcode.com/?p=5076

Retin-A For Sale, I was monitoring my Twitter feed, like I always do, and saw a tweet come through asking about how to validate an object’s property against it’s parent ObservableCollection in the Infragistics XamDataGrid.  What this person was trying to accomplish was to validate a duplicate item in his data source.  They have a POCO object the implements the IDataErrorInfo interface, and an ObservableColletion<POCO> as the data source.  They want to check the ObservableCollection<POCO> for a pre-existing item whenever a property value in a POCO changes.  Obviously this is not a XamDataGrid issue, but rather an object design issue.  So I decided to whip up a quick and dirty solution to solve this particular issue.

The approach I am going to take is to simply keep track of the parent collection from within the POCO object itself.  I really like interfaces, so I started out by defining a simple interface my POCOs will implement.

public interface IHasParent
{
    object Parent { get; set; }
}

Now let’s take a look at the simple POCO I will be using in this example.

public class Person : INotifyPropertyChanged, IDataErrorInfo
{
    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice that we implement both the INotifyPropertyChanged interfaces as well as the IDataErrorInfo interface.  The Next thing we need is a custom ObservableCollection to use as our data source.

public class HasParentObservableCollection<T> : ObservableCollection<T>
{
    protected override void InsertItem(int index, T item)
    {
        //set the parent object when a new item is added to our collection
        if (item != null && item is IHasParent)
            (item as IHasParent).Parent = this;

        base.InsertItem(index, item);
    }
}

Notice that we are casting our item as the IHasParent interface and setting the Parent property accordingly.  The next thing we need to do is have our POCO class implement the IHasPerson interface.

public class Person : INotifyPropertyChanged, IDataErrorInfo, IHasParent
{
    public object Parent { get; set; }

    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";

                if (Parent != null && Parent is IList<Person>)
                {
                    var list = (IList<Person>) Parent;
                    if (list.Count(x => x.LastName == LastName) > 1)
                        return "This last name already exists.  Please use a different last name.";
                }
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice how we implemented the check for a duplicate last name.  We simply checked to make sure we are dealing with the LastName property.  Then we cast the Parent as an IList<Person> so that we can perform a simply LINQ query against it.  We check the parent collection for any results that match the LastName property.  If more than one is returned we have a duplicate.

So let’s test this baby using the XamDataGrid as the original poster was attempting to do.  First create our UI.

<igDP:XamDataGrid Name="xamDataGrid1">
    <igDP:XamDataGrid.FieldLayouts>
        <igDP:FieldLayout>
            <igDP:Field Name="FirstName" Label="First Name" />
            <igDP:Field Name="LastName" Label="Last Name" />
        </igDP:FieldLayout>
    </igDP:XamDataGrid.FieldLayouts>
    <igDP:XamDataGrid.FieldLayoutSettings>
        <igDP:FieldLayoutSettings AddNewRecordLocation="OnTop"
                                  AllowAddNew="True"
                                  AutoGenerateFields="False"
                                  SupportDataErrorInfo="RecordsAndCells"
                                  DataErrorDisplayMode="Highlight" />
    </igDP:XamDataGrid.FieldLayoutSettings>
</igDP:XamDataGrid>

Next let’s hook up some data to this bad boy:

public MainWindow()
{
    InitializeComponent();

    var people = new HasParentObservableCollection<Person>();
    people.Add(new Person(){ FirstName = "Brian", LastName = "Lagunas"});
    xamDataGrid1.DataSource = people;
}

Now let’s run the app, type a duplicate last name, and see what we get.

collection_validated

Cool. Works as expected.  Now there are a number of ways to accomplish this task.  There are even frameworks out there that have already solved this problem for you such as CSLA.  I hope this simple approach helps you find a solution that works for you.

Download the Source.

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]]> http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/feed/ 2 Human Growth Hormone For Sale http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/?utm_source=rss&utm_medium=rss&utm_campaign=victor-gaudiosopreserving-his-contributions http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/#comments Fri, 06 Apr 2012 19:55:39 +0000 Brian Lagunas http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/

It was Sunday night.  Victor and I were having a video call on Skype finalizing our plans to host his 70+ Silverlight video tutorials on Xaml TV Human Growth Hormone For Sale, .  He was late to our meeting because he said he didn’t feel well.  He said that he was recovering from a week long illness, but he quickly assured me he was feeling better.  We chatted for awhile and then ended the meeting with some friendly banter like we always have in the past.

Sadly the next day, on the morning of Monday April 2, 2012, Victor Gaudioso passed away.  You didn’t have to know Victor long to know that he was passionate about his work and about his community.  He always went the extra mile to help his fellow developer.  I can write pages about all the good things he has done for his family, friends, and community, but instead I would like encourage you to share your memories of Victor.  Think of how he has influenced you in your life.

The Sunday before he passed, Victor gave me 73 of his videos that we would be posting on Xaml TV.  That night he posted 10 of his Microsoft Starter Kit videos.  Unfortunately he passed before he could finish his effort.  With the blessing of his family and the help of his community, we will be posting all 73 of Victor Gaudioso’s Silverlight video tutorials on Xaml TV.  We will preserve his work and contributions that he made to the community.  They will live on and not disappear with an expiring domain or hosting plan.  His legacy will continue to grow as you remember the fond memories you have of him.

If you would like to help by donating to Victor’s memorial fund or to volunteer, please visit the Los Angeles Silverlight User Group site.

Rest in peace my friend.

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]]> http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/feed/ 0 Spiriva For Sale http://elegantcode.com/2012/03/27/introducing-xaml-tv/?utm_source=rss&utm_medium=rss&utm_campaign=introducing-xaml-tv http://elegantcode.com/2012/03/27/introducing-xaml-tv/#comments Tue, 27 Mar 2012 21:46:51 +0000 Brian Lagunas http://elegantcode.com/2012/03/27/introducing-xaml-tv/

I would like announce the creation of a new developer webcast that focuses on Xaml application development called Xaml TV Spiriva For Sale, .  The purpose of Xaml TV is to provide quality Xaml content through interviews with individuals, community leaders, and technology experts in the fields of WPF, Silverlight, Windows Phone, and WinRT/Metro.  If it is Xaml we will cover it.

Currently, Xaml TV is still in the planning phase, heck we don’t even have a logo, and is targeting mid April 2012 to start recording content.  If you would like to submit a talk please feel free to contact me using the contact form.  This content is for the community by the community.  Anyone is welcome to participate.  If you have a topic you want to discuss, just submit your session and we will get you scheduled.

Please help spread the word and make this a valuable resource for our Xaml community.

Follow us on Twitter: @XamlTV and/or @BrianLagunas

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]]> http://elegantcode.com/2012/03/27/introducing-xaml-tv/feed/ 0 Buy Spiriva Without Prescription http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/?utm_source=rss&utm_medium=rss&utm_campaign=creating-a-silverlight-5-static-markup-extension http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/#comments Fri, 23 Mar 2012 19:28:28 +0000 Brian Lagunas http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/

If you have done any WPF application development I am sure you have used and fallen in love with the Static Buy Spiriva Without Prescription, markup extension.  If you’re are not familiar with it, the Static markup extension allows you to reference static fields and properties in your XAML markup.

For example; let’s assume we have a class with the following static field defined:

public class Common
{
    public static string StaticText = "This is text from a static property";
}

We can use this field in our WPF application as follows:

<Grid>
    <TextBlock Text="{x:Static ext:Common.StaticText}" />
</Grid>

image

NOTE: “ext” is a namespace that has been defined to instruct the XAML parser where to find our static field.

Pretty cool right?  Unfortunately if you are also doing any Silverlight development you will soon find that this wonderful and useful extension does NOT exist in Silverlight.  Luckily for us in Silverlight 5 we were given the ability to write our own custom markup extensions.  This can be done using either the IMarkupExtension or the abstract MarkupExtension class.

Now it’s time to create our own Static markup extension.  I want to point out that there is a naming convention when creating custom markup extensions.  The convention is as follows; ExtensionNameExtension.  The name of the extension is followed by Extension.  This is very similar to how you create attributes.  You won’t actually be using the suffix when define them in XAML. 

Let’s start by creating a new class called StaticExtension.  The StaticExtension class should derive from the MarkupExtension abstract class.  You will need to implement the abstract ProvideValue method.  The code I used for the Static markup extension is as follows.

/// <summary>
///  Class for Xaml markup extension for static field and property references.
/// </summary>
public class StaticExtension : MarkupExtension
{
    /// <summary>
    ///  The static field or property represented by a string.  This string is
    ///  of the format Prefix:ClassName.FieldOrPropertyName.  The Prefix is
    ///  optional, and refers to the XML prefix in a Xaml file.
    /// </summary>
    private string _member;
    public string Member
    {
        get { return _member; }
        set
        {
            if (value == null)
            {
                throw new ArgumentNullException("Member");
            }
            _member = value;
        }
    }

    /// <summary>
    ///  Return an object that should be set on the targetObject's targetProperty
    ///  for this markup extension.  For a StaticExtension this is a static field
    ///  or property value.
    /// </summary>
    /// <param name="serviceProvider">Object that can provide services for the markup extension.
    /// <returns>
    ///  The object to set on this property.
    /// </returns>
    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (_member == null)
            throw new InvalidOperationException("member cannot be null");

        // Validate the _member
        int dotIndex = _member.IndexOf('.');
        if (dotIndex < 0)
            throw new ArgumentException("dotIndex");

        // Pull out the type substring (this will include any XML prefix, e.g. "av:Button")
        string typeString = _member.Substring(0, Spiriva street price, Buy cheap Spiriva no rx, dotIndex);
        if (typeString == string.Empty)
            throw new ArgumentException("typeString");

        // Get the IXamlTypeResolver from the service provider
        IXamlTypeResolver xamlTypeResolver = serviceProvider.GetService(typeof(IXamlTypeResolver)) as IXamlTypeResolver;
        if (xamlTypeResolver == null)
            throw new ArgumentException("xamlTypeResolver");

        // Use the type resolver to get a Type instance
        Type type = xamlTypeResolver.Resolve(typeString);

        // Get the member name substring
        string fieldString = _member.Substring(dotIndex + 1, _member.Length - dotIndex - 1);
        if (fieldString == string.Empty)
            throw new ArgumentException("fieldString");

        // Use the built-in parser for enum types
        if (type.IsEnum)
        {
            return Enum.Parse(type, japan, craiglist, ebay, overseas, paypal, Order Spiriva from United States pharmacy, fieldString, true);
        }

        // For other types, Spiriva photos, After Spiriva, reflect
        bool found = false;
        object value = null;

        object fieldOrProp = type.GetField(fieldString, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
        if (fieldOrProp == null)
        {
            fieldOrProp = type.GetProperty(fieldString, Spiriva mg, Spiriva price, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
            if (fieldOrProp is PropertyInfo)
            {
                value = ((PropertyInfo)fieldOrProp).GetValue(null, null);
                found = true;
            }
        }
        else if (fieldOrProp is FieldInfo)
        {
            value = ((FieldInfo)fieldOrProp).GetValue(null);
            found = true;
        }

        if (found)
            return value;
        else
            throw new ArgumentException("not found");
    }
}

Now all I need to do is add a namespace to my Silverlight view and then use it in XAML as follows:

<Grid x:Name="LayoutRoot" Background="White">
    <TextBlock Text="{ext:Static Member=ext:Common.StaticText}" />
</Grid>

image

That’s it!  I will definitely be using this quite often.  I would like to mention that unlike in WPF where you don’t have to specify the “Member” property explicitly, buy Spiriva online no prescription, Spiriva brand name, in Silveright you have to explicitly set the Member property.  This is because there is not a ConstructorArgument attribute in Silverlight.  So until then you will need to have a little extra text in your markup syntax.

Download the source.

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]]> http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/feed/ 2 Cephalexin For Sale http://elegantcode.com/2011/11/04/free-prism-training/?utm_source=rss&utm_medium=rss&utm_campaign=free-prism-training http://elegantcode.com/2011/11/04/free-prism-training/#comments Sat, 05 Nov 2011 04:23:40 +0000 Brian Lagunas http://elegantcode.com/2011/11/04/free-prism-training/

I am excited to announce that Pluralsight and Microsoft’s Patterns & Practices Cephalexin For Sale, team have joined forces to provide you with free access to over 4 hours of online Prism training.  That’s right, you heard me correctly. FREE online Prism training sponsored by the one and only Patterns & Practices team.  I know you have some question so let me answer the most common:

Q & A

Q1, after Cephalexin. Cephalexin price, When is this free training available?
A1. The entire weekend of Nov 12th 2011 through Nov 14th 2011.

Q2, ordering Cephalexin online. Cephalexin class, Do I have to be a Pluralsight subscriber to get this awesome training?
A2. This training will be freely available to everyone, Cephalexin For Sale. You do not have to be a subscriber.

Q3, Cephalexin alternatives. Cephalexin wiki, What does the course cover?
A3. Well let’s take a look:

  • Getting started with Prism
  • Bootstrapper and Shell
  • Regions
  • Modules
  • Views
  • Communication
  • State-Based Navigation
  • View-Based Navigation

More course information.

Q4, Cephalexin samples. Order Cephalexin from mexican pharmacy, Who is the author of this kick ass Prism course?
Q4. That would be me.

Cephalexin For Sale, Q5. Is it really free?
Q5, buy Cephalexin online cod. Herbal Cephalexin, You’re kidding right. Didn’t I already cover this part, about Cephalexin. Cephalexin natural, Yes, it is free.

New and Improved

If you are a subscriber and have already watched the course, Cephalexin trusted pharmacy reviews, Cephalexin description, I would like to bring to your attention that there have been two new modules added.  These modules will cover everything you need to know in order to start using the navigation services provided by Prism.  This includes state-based navigation and view-based navigation.

Mark your calendar for Nov 12th and be sure to cram as much Prism knowledge into your brain as you can before the weekend ends.  Don’t worry, if you run out of time you can always ask me questions directly.  You can contact me either through Twitter (@brianlagunas) or through the Extended WPF Toolkit project site.  I hope you enjoy the training.

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]]> http://elegantcode.com/2011/11/04/free-prism-training/feed/ 6 Silverlight 4 Service Release 4.0.50826.0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/?utm_source=rss&utm_medium=rss&utm_campaign=silverlight-4-service-release-4-0-50826-0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/#comments Thu, 02 Sep 2010 15:07:03 +0000 Brian Lagunas http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/ In case you haven’t heard yet, Microsoft released a new update for Silverlight 4 yesterday, along with a new SDK.  You can check out the details at KB2164913.

The stuff I was interested in:

  • Add New Row for the DataGrid
  • Improved application startup performance
  • Mouse wheel support for out-of-browser  applications on the Mac
  • Media bug fixes
  • MouseCapture memory leak is fixed
  • Inline DataTemplate memory leak fixed.

Developers go get the tools:

]]> http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/feed/ 0 geekSpeak: Local Messaging and Silverlight on Channel9 http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/?utm_source=rss&utm_medium=rss&utm_campaign=validate-a-property-against-a-parent-collection http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/#comments Thu, 12 Apr 2012 00:34:53 +0000 Brian Lagunas http://elegantcode.com/?p=5076

Retin-A For Sale, I was monitoring my Twitter feed, like I always do, and saw a tweet come through asking about how to validate an object’s property against it’s parent ObservableCollection in the Infragistics XamDataGrid.  What this person was trying to accomplish was to validate a duplicate item in his data source.  They have a POCO object the implements the IDataErrorInfo interface, and an ObservableColletion<POCO> as the data source.  They want to check the ObservableCollection<POCO> for a pre-existing item whenever a property value in a POCO changes.  Obviously this is not a XamDataGrid issue, but rather an object design issue.  So I decided to whip up a quick and dirty solution to solve this particular issue.

The approach I am going to take is to simply keep track of the parent collection from within the POCO object itself.  I really like interfaces, so I started out by defining a simple interface my POCOs will implement.

public interface IHasParent
{
    object Parent { get; set; }
}

Now let’s take a look at the simple POCO I will be using in this example.

public class Person : INotifyPropertyChanged, IDataErrorInfo
{
    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice that we implement both the INotifyPropertyChanged interfaces as well as the IDataErrorInfo interface.  The Next thing we need is a custom ObservableCollection to use as our data source.

public class HasParentObservableCollection<T> : ObservableCollection<T>
{
    protected override void InsertItem(int index, T item)
    {
        //set the parent object when a new item is added to our collection
        if (item != null && item is IHasParent)
            (item as IHasParent).Parent = this;

        base.InsertItem(index, item);
    }
}

Notice that we are casting our item as the IHasParent interface and setting the Parent property accordingly.  The next thing we need to do is have our POCO class implement the IHasPerson interface.

public class Person : INotifyPropertyChanged, IDataErrorInfo, IHasParent
{
    public object Parent { get; set; }

    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";

                if (Parent != null && Parent is IList<Person>)
                {
                    var list = (IList<Person>) Parent;
                    if (list.Count(x => x.LastName == LastName) > 1)
                        return "This last name already exists.  Please use a different last name.";
                }
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice how we implemented the check for a duplicate last name.  We simply checked to make sure we are dealing with the LastName property.  Then we cast the Parent as an IList<Person> so that we can perform a simply LINQ query against it.  We check the parent collection for any results that match the LastName property.  If more than one is returned we have a duplicate.

So let’s test this baby using the XamDataGrid as the original poster was attempting to do.  First create our UI.

<igDP:XamDataGrid Name="xamDataGrid1">
    <igDP:XamDataGrid.FieldLayouts>
        <igDP:FieldLayout>
            <igDP:Field Name="FirstName" Label="First Name" />
            <igDP:Field Name="LastName" Label="Last Name" />
        </igDP:FieldLayout>
    </igDP:XamDataGrid.FieldLayouts>
    <igDP:XamDataGrid.FieldLayoutSettings>
        <igDP:FieldLayoutSettings AddNewRecordLocation="OnTop"
                                  AllowAddNew="True"
                                  AutoGenerateFields="False"
                                  SupportDataErrorInfo="RecordsAndCells"
                                  DataErrorDisplayMode="Highlight" />
    </igDP:XamDataGrid.FieldLayoutSettings>
</igDP:XamDataGrid>

Next let’s hook up some data to this bad boy:

public MainWindow()
{
    InitializeComponent();

    var people = new HasParentObservableCollection<Person>();
    people.Add(new Person(){ FirstName = "Brian", LastName = "Lagunas"});
    xamDataGrid1.DataSource = people;
}

Now let’s run the app, type a duplicate last name, and see what we get.

collection_validated

Cool. Works as expected.  Now there are a number of ways to accomplish this task.  There are even frameworks out there that have already solved this problem for you such as CSLA.  I hope this simple approach helps you find a solution that works for you.

Download the Source.

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]]> http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/feed/ 2 Elegant Code » Silverlight http://elegantcode.com Tue, 15 May 2012 10:00:00 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Buy Retin-A Without Prescription http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-part-1setting-up-the-prism-application http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/#comments Wed, 25 Apr 2012 20:03:18 +0000 Brian Lagunas http://elegantcode.com/?p=5158

Buy Retin-A Without Prescription, This is the first video in a series that will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  This video covers how to setup a multi-platform Prism application that targets WPF and Silverlight.  I show you how to setup your directory structure, as well as the solution/project structure inside Visual Studio.  We also create a functional Silverlight and WPF shell application and see our first glimpse of code sharing with the bootstrapper.

Watch the video on Xaml TV.

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]]> http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/feed/ 0 Amoxicillin For Sale http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-introduction-to-a-prism-app http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/#comments Tue, 24 Apr 2012 01:41:57 +0000 Brian Lagunas http://elegantcode.com/?p=5156

Amoxicillin For Sale, Often when learning a technology you start by searching the web.  You look for videos, blogs, articles, samples, and examples.  What you start to realize is that everything you find is very simple “demo” code.  That’s code that shows how to implement a simple feature in a non-realistic demo.  Then you start looking for “production” code examples.  That’s code that represents a more realistic implementation of an application in a production environment.  This type of resource is very difficult to find.  Why?  Mainly, because it is very time consuming to create such examples.

This scenario is no different when trying to learn Prism.  You probably first start by reading though the documentation.  Next, you head on over to Pluralsight and watch my Introduction to Prism course.  Now that you know all the basics you start searching the web for examples for specific scenarios.  How do I do “x” and “y”?  How do I apply this sample code to my application?  Hopefully I can help you answer those questions.

I am starting a new video series called Building IG Outlook.  I will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  We will be discussing the following key areas in no specific order:

  1. Application architecture/structure
  2. Multi-platform support (WPF and Silverlight)
  3. Commanding
  4. Event aggregation
  5. Custom RegionAdapters
  6. Custom RegionBehaviors
  7. Navigation (OutlookBar, Ribbon, and View interaction)
  8. MVVM (no frameworks needed)

Like most production applications we will have a dependency on a 3rd party toolset.  I will be using Infragistics NetAdvantage for WPF and Silverlight.  If you don’t own Infragistics you can download the trial or purchase the suite so you can compile and run all the sample code.  Otherwise, you will have to modify the code to work with your vendor of choice.

I hope this series will help you gain a better understanding of how you can use the various aspects of Prism to build your applications.  This will be a long series and I plan to record at least one a week depending on my traveling schedule.  If you have any questions or would like to see something specific be sure to let me know, and I will see if I can squeeze an example in the application.

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]]> http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/feed/ 0 Buy Flagyl Without Prescription http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/?utm_source=rss&utm_medium=rss&utm_campaign=create-a-custom-prism-regionadapter http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/#comments Wed, 18 Apr 2012 19:26:48 +0000 Brian Lagunas http://elegantcode.com/?p=5148

Don’t want to read the article?  Watch the video tutorial on Xaml TV.

Prism provides 4 region adapters out of the box for you:

  • ContentControlRegionAdapter
  • SelectorRegionAdaptor
  • ItemsControlRegionAdapter
  • TabControlRegionAdapter (Silverlight only)

Buy Flagyl Without Prescription, Well, what happens when you want to use a different control as a region host?  Simple.  You need to write a custom region adapter for it.  Is it hard you ask?  No it is quite easy.  Let’s write one for the StackPanel.

Start by creating a class the derive from and implements the base abstract class RegionAdapterBase<T>.

public class StackPanelRegionAdapter : RegionAdapterBase<StackPanel>
{
    public StackPanelRegionAdapter(IRegionBehaviorFactory factory)
        : base(factory)
    {

    }

    protected override void Adapt(IRegion region, StackPanel regionTarget)
    {
        region.Views.CollectionChanged += (s, e) =>
            {
                if (e.Action == NotifyCollectionChangedAction.Add)
                {
                    foreach (FrameworkElement element in e.NewItems)
                    {
                        regionTarget.Children.Add(element);
                    }
                }

                //implement remove
            };
    }

    protected override IRegion CreateRegion()
    {
        return new AllActiveRegion();
    }
}

Notice that there are two methods we need to implement. Adapt and CreateRegion.  CreateRegion return the type of region we will need.  In our case we want to support multiple views so we need to return an instance of an AllActiveRegion.  If we only needed support for one view at a time we would return a SingleActiveRegion.  The Adapt method is responsible for adapting the region to our control.  This is where we will add and remove the views to or host control.

Now we simply have to tell Prism about our new RegionAdapter.  We do this in the bootstrapper.  Simply override the ConfigureRegionAdapterMappings method as follows:

protected override Microsoft.Practices.Prism.Regions.RegionAdapterMappings ConfigureRegionAdapterMappings()
{
    RegionAdapterMappings mappings = base.ConfigureRegionAdapterMappings();
    mappings.RegisterMapping(typeof(StackPanel), Flagyl dose, Buy generic Flagyl, Container.Resolve<StackPanelRegionAdapter>());
    return mappings;
}

That’s it.  Now you can use a StackPanel as a region host:

<StackPanel Orientation="Horizontal"
            prism:RegionManager.RegionName="MyRegion" />

 

Download the sample application.

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]]> http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/feed/ 1 Retin-A For Sale http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/?utm_source=rss&utm_medium=rss&utm_campaign=validate-a-property-against-a-parent-collection http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/#comments Thu, 12 Apr 2012 00:34:53 +0000 Brian Lagunas http://elegantcode.com/?p=5076

Retin-A For Sale, I was monitoring my Twitter feed, like I always do, and saw a tweet come through asking about how to validate an object’s property against it’s parent ObservableCollection in the Infragistics XamDataGrid.  What this person was trying to accomplish was to validate a duplicate item in his data source.  They have a POCO object the implements the IDataErrorInfo interface, and an ObservableColletion<POCO> as the data source.  They want to check the ObservableCollection<POCO> for a pre-existing item whenever a property value in a POCO changes.  Obviously this is not a XamDataGrid issue, but rather an object design issue.  So I decided to whip up a quick and dirty solution to solve this particular issue.

The approach I am going to take is to simply keep track of the parent collection from within the POCO object itself.  I really like interfaces, so I started out by defining a simple interface my POCOs will implement.

public interface IHasParent
{
    object Parent { get; set; }
}

Now let’s take a look at the simple POCO I will be using in this example.

public class Person : INotifyPropertyChanged, IDataErrorInfo
{
    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice that we implement both the INotifyPropertyChanged interfaces as well as the IDataErrorInfo interface.  The Next thing we need is a custom ObservableCollection to use as our data source.

public class HasParentObservableCollection<T> : ObservableCollection<T>
{
    protected override void InsertItem(int index, T item)
    {
        //set the parent object when a new item is added to our collection
        if (item != null && item is IHasParent)
            (item as IHasParent).Parent = this;

        base.InsertItem(index, item);
    }
}

Notice that we are casting our item as the IHasParent interface and setting the Parent property accordingly.  The next thing we need to do is have our POCO class implement the IHasPerson interface.

public class Person : INotifyPropertyChanged, IDataErrorInfo, IHasParent
{
    public object Parent { get; set; }

    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";

                if (Parent != null && Parent is IList<Person>)
                {
                    var list = (IList<Person>) Parent;
                    if (list.Count(x => x.LastName == LastName) > 1)
                        return "This last name already exists.  Please use a different last name.";
                }
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice how we implemented the check for a duplicate last name.  We simply checked to make sure we are dealing with the LastName property.  Then we cast the Parent as an IList<Person> so that we can perform a simply LINQ query against it.  We check the parent collection for any results that match the LastName property.  If more than one is returned we have a duplicate.

So let’s test this baby using the XamDataGrid as the original poster was attempting to do.  First create our UI.

<igDP:XamDataGrid Name="xamDataGrid1">
    <igDP:XamDataGrid.FieldLayouts>
        <igDP:FieldLayout>
            <igDP:Field Name="FirstName" Label="First Name" />
            <igDP:Field Name="LastName" Label="Last Name" />
        </igDP:FieldLayout>
    </igDP:XamDataGrid.FieldLayouts>
    <igDP:XamDataGrid.FieldLayoutSettings>
        <igDP:FieldLayoutSettings AddNewRecordLocation="OnTop"
                                  AllowAddNew="True"
                                  AutoGenerateFields="False"
                                  SupportDataErrorInfo="RecordsAndCells"
                                  DataErrorDisplayMode="Highlight" />
    </igDP:XamDataGrid.FieldLayoutSettings>
</igDP:XamDataGrid>

Next let’s hook up some data to this bad boy:

public MainWindow()
{
    InitializeComponent();

    var people = new HasParentObservableCollection<Person>();
    people.Add(new Person(){ FirstName = "Brian", LastName = "Lagunas"});
    xamDataGrid1.DataSource = people;
}

Now let’s run the app, type a duplicate last name, and see what we get.

collection_validated

Cool. Works as expected.  Now there are a number of ways to accomplish this task.  There are even frameworks out there that have already solved this problem for you such as CSLA.  I hope this simple approach helps you find a solution that works for you.

Download the Source.

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]]> http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/feed/ 2 Human Growth Hormone For Sale http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/?utm_source=rss&utm_medium=rss&utm_campaign=victor-gaudiosopreserving-his-contributions http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/#comments Fri, 06 Apr 2012 19:55:39 +0000 Brian Lagunas http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/

It was Sunday night.  Victor and I were having a video call on Skype finalizing our plans to host his 70+ Silverlight video tutorials on Xaml TV Human Growth Hormone For Sale, .  He was late to our meeting because he said he didn’t feel well.  He said that he was recovering from a week long illness, but he quickly assured me he was feeling better.  We chatted for awhile and then ended the meeting with some friendly banter like we always have in the past.

Sadly the next day, on the morning of Monday April 2, 2012, Victor Gaudioso passed away.  You didn’t have to know Victor long to know that he was passionate about his work and about his community.  He always went the extra mile to help his fellow developer.  I can write pages about all the good things he has done for his family, friends, and community, but instead I would like encourage you to share your memories of Victor.  Think of how he has influenced you in your life.

The Sunday before he passed, Victor gave me 73 of his videos that we would be posting on Xaml TV.  That night he posted 10 of his Microsoft Starter Kit videos.  Unfortunately he passed before he could finish his effort.  With the blessing of his family and the help of his community, we will be posting all 73 of Victor Gaudioso’s Silverlight video tutorials on Xaml TV.  We will preserve his work and contributions that he made to the community.  They will live on and not disappear with an expiring domain or hosting plan.  His legacy will continue to grow as you remember the fond memories you have of him.

If you would like to help by donating to Victor’s memorial fund or to volunteer, please visit the Los Angeles Silverlight User Group site.

Rest in peace my friend.

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]]> http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/feed/ 0 Spiriva For Sale http://elegantcode.com/2012/03/27/introducing-xaml-tv/?utm_source=rss&utm_medium=rss&utm_campaign=introducing-xaml-tv http://elegantcode.com/2012/03/27/introducing-xaml-tv/#comments Tue, 27 Mar 2012 21:46:51 +0000 Brian Lagunas http://elegantcode.com/2012/03/27/introducing-xaml-tv/

I would like announce the creation of a new developer webcast that focuses on Xaml application development called Xaml TV Spiriva For Sale, .  The purpose of Xaml TV is to provide quality Xaml content through interviews with individuals, community leaders, and technology experts in the fields of WPF, Silverlight, Windows Phone, and WinRT/Metro.  If it is Xaml we will cover it.

Currently, Xaml TV is still in the planning phase, heck we don’t even have a logo, and is targeting mid April 2012 to start recording content.  If you would like to submit a talk please feel free to contact me using the contact form.  This content is for the community by the community.  Anyone is welcome to participate.  If you have a topic you want to discuss, just submit your session and we will get you scheduled.

Please help spread the word and make this a valuable resource for our Xaml community.

Follow us on Twitter: @XamlTV and/or @BrianLagunas

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]]> http://elegantcode.com/2012/03/27/introducing-xaml-tv/feed/ 0 Buy Spiriva Without Prescription http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/?utm_source=rss&utm_medium=rss&utm_campaign=creating-a-silverlight-5-static-markup-extension http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/#comments Fri, 23 Mar 2012 19:28:28 +0000 Brian Lagunas http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/

If you have done any WPF application development I am sure you have used and fallen in love with the Static Buy Spiriva Without Prescription, markup extension.  If you’re are not familiar with it, the Static markup extension allows you to reference static fields and properties in your XAML markup.

For example; let’s assume we have a class with the following static field defined:

public class Common
{
    public static string StaticText = "This is text from a static property";
}

We can use this field in our WPF application as follows:

<Grid>
    <TextBlock Text="{x:Static ext:Common.StaticText}" />
</Grid>

image

NOTE: “ext” is a namespace that has been defined to instruct the XAML parser where to find our static field.

Pretty cool right?  Unfortunately if you are also doing any Silverlight development you will soon find that this wonderful and useful extension does NOT exist in Silverlight.  Luckily for us in Silverlight 5 we were given the ability to write our own custom markup extensions.  This can be done using either the IMarkupExtension or the abstract MarkupExtension class.

Now it’s time to create our own Static markup extension.  I want to point out that there is a naming convention when creating custom markup extensions.  The convention is as follows; ExtensionNameExtension.  The name of the extension is followed by Extension.  This is very similar to how you create attributes.  You won’t actually be using the suffix when define them in XAML. 

Let’s start by creating a new class called StaticExtension.  The StaticExtension class should derive from the MarkupExtension abstract class.  You will need to implement the abstract ProvideValue method.  The code I used for the Static markup extension is as follows.

/// <summary>
///  Class for Xaml markup extension for static field and property references.
/// </summary>
public class StaticExtension : MarkupExtension
{
    /// <summary>
    ///  The static field or property represented by a string.  This string is
    ///  of the format Prefix:ClassName.FieldOrPropertyName.  The Prefix is
    ///  optional, and refers to the XML prefix in a Xaml file.
    /// </summary>
    private string _member;
    public string Member
    {
        get { return _member; }
        set
        {
            if (value == null)
            {
                throw new ArgumentNullException("Member");
            }
            _member = value;
        }
    }

    /// <summary>
    ///  Return an object that should be set on the targetObject's targetProperty
    ///  for this markup extension.  For a StaticExtension this is a static field
    ///  or property value.
    /// </summary>
    /// <param name="serviceProvider">Object that can provide services for the markup extension.
    /// <returns>
    ///  The object to set on this property.
    /// </returns>
    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (_member == null)
            throw new InvalidOperationException("member cannot be null");

        // Validate the _member
        int dotIndex = _member.IndexOf('.');
        if (dotIndex < 0)
            throw new ArgumentException("dotIndex");

        // Pull out the type substring (this will include any XML prefix, e.g. "av:Button")
        string typeString = _member.Substring(0, Spiriva street price, Buy cheap Spiriva no rx, dotIndex);
        if (typeString == string.Empty)
            throw new ArgumentException("typeString");

        // Get the IXamlTypeResolver from the service provider
        IXamlTypeResolver xamlTypeResolver = serviceProvider.GetService(typeof(IXamlTypeResolver)) as IXamlTypeResolver;
        if (xamlTypeResolver == null)
            throw new ArgumentException("xamlTypeResolver");

        // Use the type resolver to get a Type instance
        Type type = xamlTypeResolver.Resolve(typeString);

        // Get the member name substring
        string fieldString = _member.Substring(dotIndex + 1, _member.Length - dotIndex - 1);
        if (fieldString == string.Empty)
            throw new ArgumentException("fieldString");

        // Use the built-in parser for enum types
        if (type.IsEnum)
        {
            return Enum.Parse(type, japan, craiglist, ebay, overseas, paypal, Order Spiriva from United States pharmacy, fieldString, true);
        }

        // For other types, Spiriva photos, After Spiriva, reflect
        bool found = false;
        object value = null;

        object fieldOrProp = type.GetField(fieldString, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
        if (fieldOrProp == null)
        {
            fieldOrProp = type.GetProperty(fieldString, Spiriva mg, Spiriva price, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
            if (fieldOrProp is PropertyInfo)
            {
                value = ((PropertyInfo)fieldOrProp).GetValue(null, null);
                found = true;
            }
        }
        else if (fieldOrProp is FieldInfo)
        {
            value = ((FieldInfo)fieldOrProp).GetValue(null);
            found = true;
        }

        if (found)
            return value;
        else
            throw new ArgumentException("not found");
    }
}

Now all I need to do is add a namespace to my Silverlight view and then use it in XAML as follows:

<Grid x:Name="LayoutRoot" Background="White">
    <TextBlock Text="{ext:Static Member=ext:Common.StaticText}" />
</Grid>

image

That’s it!  I will definitely be using this quite often.  I would like to mention that unlike in WPF where you don’t have to specify the “Member” property explicitly, buy Spiriva online no prescription, Spiriva brand name, in Silveright you have to explicitly set the Member property.  This is because there is not a ConstructorArgument attribute in Silverlight.  So until then you will need to have a little extra text in your markup syntax.

Download the source.

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]]> http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/feed/ 2 Cephalexin For Sale http://elegantcode.com/2011/11/04/free-prism-training/?utm_source=rss&utm_medium=rss&utm_campaign=free-prism-training http://elegantcode.com/2011/11/04/free-prism-training/#comments Sat, 05 Nov 2011 04:23:40 +0000 Brian Lagunas http://elegantcode.com/2011/11/04/free-prism-training/

I am excited to announce that Pluralsight and Microsoft’s Patterns & Practices Cephalexin For Sale, team have joined forces to provide you with free access to over 4 hours of online Prism training.  That’s right, you heard me correctly. FREE online Prism training sponsored by the one and only Patterns & Practices team.  I know you have some question so let me answer the most common:

Q & A

Q1, after Cephalexin. Cephalexin price, When is this free training available?
A1. The entire weekend of Nov 12th 2011 through Nov 14th 2011.

Q2, ordering Cephalexin online. Cephalexin class, Do I have to be a Pluralsight subscriber to get this awesome training?
A2. This training will be freely available to everyone, Cephalexin For Sale. You do not have to be a subscriber.

Q3, Cephalexin alternatives. Cephalexin wiki, What does the course cover?
A3. Well let’s take a look:

  • Getting started with Prism
  • Bootstrapper and Shell
  • Regions
  • Modules
  • Views
  • Communication
  • State-Based Navigation
  • View-Based Navigation

More course information.

Q4, Cephalexin samples. Order Cephalexin from mexican pharmacy, Who is the author of this kick ass Prism course?
Q4. That would be me.

Cephalexin For Sale, Q5. Is it really free?
Q5, buy Cephalexin online cod. Herbal Cephalexin, You’re kidding right. Didn’t I already cover this part, about Cephalexin. Cephalexin natural, Yes, it is free.

New and Improved

If you are a subscriber and have already watched the course, Cephalexin trusted pharmacy reviews, Cephalexin description, I would like to bring to your attention that there have been two new modules added.  These modules will cover everything you need to know in order to start using the navigation services provided by Prism.  This includes state-based navigation and view-based navigation.

Mark your calendar for Nov 12th and be sure to cram as much Prism knowledge into your brain as you can before the weekend ends.  Don’t worry, if you run out of time you can always ask me questions directly.  You can contact me either through Twitter (@brianlagunas) or through the Extended WPF Toolkit project site.  I hope you enjoy the training.

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]]> http://elegantcode.com/2011/11/04/free-prism-training/feed/ 6 Silverlight 4 Service Release 4.0.50826.0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/?utm_source=rss&utm_medium=rss&utm_campaign=silverlight-4-service-release-4-0-50826-0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/#comments Thu, 02 Sep 2010 15:07:03 +0000 Brian Lagunas http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/ In case you haven’t heard yet, Microsoft released a new update for Silverlight 4 yesterday, along with a new SDK.  You can check out the details at KB2164913.

The stuff I was interested in:

  • Add New Row for the DataGrid
  • Improved application startup performance
  • Mouse wheel support for out-of-browser  applications on the Mac
  • Media bug fixes
  • MouseCapture memory leak is fixed
  • Inline DataTemplate memory leak fixed.

Developers go get the tools:

]]> http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/feed/ 0 geekSpeak: Local Messaging and Silverlight on Channel9 http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/?utm_source=rss&utm_medium=rss&utm_campaign=victor-gaudiosopreserving-his-contributions http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/#comments Fri, 06 Apr 2012 19:55:39 +0000 Brian Lagunas http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/

It was Sunday night.  Victor and I were having a video call on Skype finalizing our plans to host his 70+ Silverlight video tutorials on Xaml TV Human Growth Hormone For Sale, .  He was late to our meeting because he said he didn’t feel well.  He said that he was recovering from a week long illness, but he quickly assured me he was feeling better.  We chatted for awhile and then ended the meeting with some friendly banter like we always have in the past.

Sadly the next day, on the morning of Monday April 2, 2012, Victor Gaudioso passed away.  You didn’t have to know Victor long to know that he was passionate about his work and about his community.  He always went the extra mile to help his fellow developer.  I can write pages about all the good things he has done for his family, friends, and community, but instead I would like encourage you to share your memories of Victor.  Think of how he has influenced you in your life.

The Sunday before he passed, Victor gave me 73 of his videos that we would be posting on Xaml TV.  That night he posted 10 of his Microsoft Starter Kit videos.  Unfortunately he passed before he could finish his effort.  With the blessing of his family and the help of his community, we will be posting all 73 of Victor Gaudioso’s Silverlight video tutorials on Xaml TV.  We will preserve his work and contributions that he made to the community.  They will live on and not disappear with an expiring domain or hosting plan.  His legacy will continue to grow as you remember the fond memories you have of him.

If you would like to help by donating to Victor’s memorial fund or to volunteer, please visit the Los Angeles Silverlight User Group site.

Rest in peace my friend.

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]]> http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/feed/ 0 Elegant Code » Silverlight http://elegantcode.com Tue, 15 May 2012 10:00:00 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Buy Retin-A Without Prescription http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-part-1setting-up-the-prism-application http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/#comments Wed, 25 Apr 2012 20:03:18 +0000 Brian Lagunas http://elegantcode.com/?p=5158

Buy Retin-A Without Prescription, This is the first video in a series that will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  This video covers how to setup a multi-platform Prism application that targets WPF and Silverlight.  I show you how to setup your directory structure, as well as the solution/project structure inside Visual Studio.  We also create a functional Silverlight and WPF shell application and see our first glimpse of code sharing with the bootstrapper.

Watch the video on Xaml TV.

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]]> http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/feed/ 0 Amoxicillin For Sale http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-introduction-to-a-prism-app http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/#comments Tue, 24 Apr 2012 01:41:57 +0000 Brian Lagunas http://elegantcode.com/?p=5156

Amoxicillin For Sale, Often when learning a technology you start by searching the web.  You look for videos, blogs, articles, samples, and examples.  What you start to realize is that everything you find is very simple “demo” code.  That’s code that shows how to implement a simple feature in a non-realistic demo.  Then you start looking for “production” code examples.  That’s code that represents a more realistic implementation of an application in a production environment.  This type of resource is very difficult to find.  Why?  Mainly, because it is very time consuming to create such examples.

This scenario is no different when trying to learn Prism.  You probably first start by reading though the documentation.  Next, you head on over to Pluralsight and watch my Introduction to Prism course.  Now that you know all the basics you start searching the web for examples for specific scenarios.  How do I do “x” and “y”?  How do I apply this sample code to my application?  Hopefully I can help you answer those questions.

I am starting a new video series called Building IG Outlook.  I will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  We will be discussing the following key areas in no specific order:

  1. Application architecture/structure
  2. Multi-platform support (WPF and Silverlight)
  3. Commanding
  4. Event aggregation
  5. Custom RegionAdapters
  6. Custom RegionBehaviors
  7. Navigation (OutlookBar, Ribbon, and View interaction)
  8. MVVM (no frameworks needed)

Like most production applications we will have a dependency on a 3rd party toolset.  I will be using Infragistics NetAdvantage for WPF and Silverlight.  If you don’t own Infragistics you can download the trial or purchase the suite so you can compile and run all the sample code.  Otherwise, you will have to modify the code to work with your vendor of choice.

I hope this series will help you gain a better understanding of how you can use the various aspects of Prism to build your applications.  This will be a long series and I plan to record at least one a week depending on my traveling schedule.  If you have any questions or would like to see something specific be sure to let me know, and I will see if I can squeeze an example in the application.

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]]> http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/feed/ 0 Buy Flagyl Without Prescription http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/?utm_source=rss&utm_medium=rss&utm_campaign=create-a-custom-prism-regionadapter http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/#comments Wed, 18 Apr 2012 19:26:48 +0000 Brian Lagunas http://elegantcode.com/?p=5148

Don’t want to read the article?  Watch the video tutorial on Xaml TV.

Prism provides 4 region adapters out of the box for you:

  • ContentControlRegionAdapter
  • SelectorRegionAdaptor
  • ItemsControlRegionAdapter
  • TabControlRegionAdapter (Silverlight only)

Buy Flagyl Without Prescription, Well, what happens when you want to use a different control as a region host?  Simple.  You need to write a custom region adapter for it.  Is it hard you ask?  No it is quite easy.  Let’s write one for the StackPanel.

Start by creating a class the derive from and implements the base abstract class RegionAdapterBase<T>.

public class StackPanelRegionAdapter : RegionAdapterBase<StackPanel>
{
    public StackPanelRegionAdapter(IRegionBehaviorFactory factory)
        : base(factory)
    {

    }

    protected override void Adapt(IRegion region, StackPanel regionTarget)
    {
        region.Views.CollectionChanged += (s, e) =>
            {
                if (e.Action == NotifyCollectionChangedAction.Add)
                {
                    foreach (FrameworkElement element in e.NewItems)
                    {
                        regionTarget.Children.Add(element);
                    }
                }

                //implement remove
            };
    }

    protected override IRegion CreateRegion()
    {
        return new AllActiveRegion();
    }
}

Notice that there are two methods we need to implement. Adapt and CreateRegion.  CreateRegion return the type of region we will need.  In our case we want to support multiple views so we need to return an instance of an AllActiveRegion.  If we only needed support for one view at a time we would return a SingleActiveRegion.  The Adapt method is responsible for adapting the region to our control.  This is where we will add and remove the views to or host control.

Now we simply have to tell Prism about our new RegionAdapter.  We do this in the bootstrapper.  Simply override the ConfigureRegionAdapterMappings method as follows:

protected override Microsoft.Practices.Prism.Regions.RegionAdapterMappings ConfigureRegionAdapterMappings()
{
    RegionAdapterMappings mappings = base.ConfigureRegionAdapterMappings();
    mappings.RegisterMapping(typeof(StackPanel), Flagyl dose, Buy generic Flagyl, Container.Resolve<StackPanelRegionAdapter>());
    return mappings;
}

That’s it.  Now you can use a StackPanel as a region host:

<StackPanel Orientation="Horizontal"
            prism:RegionManager.RegionName="MyRegion" />

 

Download the sample application.

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]]> http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/feed/ 1 Retin-A For Sale http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/?utm_source=rss&utm_medium=rss&utm_campaign=validate-a-property-against-a-parent-collection http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/#comments Thu, 12 Apr 2012 00:34:53 +0000 Brian Lagunas http://elegantcode.com/?p=5076

Retin-A For Sale, I was monitoring my Twitter feed, like I always do, and saw a tweet come through asking about how to validate an object’s property against it’s parent ObservableCollection in the Infragistics XamDataGrid.  What this person was trying to accomplish was to validate a duplicate item in his data source.  They have a POCO object the implements the IDataErrorInfo interface, and an ObservableColletion<POCO> as the data source.  They want to check the ObservableCollection<POCO> for a pre-existing item whenever a property value in a POCO changes.  Obviously this is not a XamDataGrid issue, but rather an object design issue.  So I decided to whip up a quick and dirty solution to solve this particular issue.

The approach I am going to take is to simply keep track of the parent collection from within the POCO object itself.  I really like interfaces, so I started out by defining a simple interface my POCOs will implement.

public interface IHasParent
{
    object Parent { get; set; }
}

Now let’s take a look at the simple POCO I will be using in this example.

public class Person : INotifyPropertyChanged, IDataErrorInfo
{
    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice that we implement both the INotifyPropertyChanged interfaces as well as the IDataErrorInfo interface.  The Next thing we need is a custom ObservableCollection to use as our data source.

public class HasParentObservableCollection<T> : ObservableCollection<T>
{
    protected override void InsertItem(int index, T item)
    {
        //set the parent object when a new item is added to our collection
        if (item != null && item is IHasParent)
            (item as IHasParent).Parent = this;

        base.InsertItem(index, item);
    }
}

Notice that we are casting our item as the IHasParent interface and setting the Parent property accordingly.  The next thing we need to do is have our POCO class implement the IHasPerson interface.

public class Person : INotifyPropertyChanged, IDataErrorInfo, IHasParent
{
    public object Parent { get; set; }

    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";

                if (Parent != null && Parent is IList<Person>)
                {
                    var list = (IList<Person>) Parent;
                    if (list.Count(x => x.LastName == LastName) > 1)
                        return "This last name already exists.  Please use a different last name.";
                }
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice how we implemented the check for a duplicate last name.  We simply checked to make sure we are dealing with the LastName property.  Then we cast the Parent as an IList<Person> so that we can perform a simply LINQ query against it.  We check the parent collection for any results that match the LastName property.  If more than one is returned we have a duplicate.

So let’s test this baby using the XamDataGrid as the original poster was attempting to do.  First create our UI.

<igDP:XamDataGrid Name="xamDataGrid1">
    <igDP:XamDataGrid.FieldLayouts>
        <igDP:FieldLayout>
            <igDP:Field Name="FirstName" Label="First Name" />
            <igDP:Field Name="LastName" Label="Last Name" />
        </igDP:FieldLayout>
    </igDP:XamDataGrid.FieldLayouts>
    <igDP:XamDataGrid.FieldLayoutSettings>
        <igDP:FieldLayoutSettings AddNewRecordLocation="OnTop"
                                  AllowAddNew="True"
                                  AutoGenerateFields="False"
                                  SupportDataErrorInfo="RecordsAndCells"
                                  DataErrorDisplayMode="Highlight" />
    </igDP:XamDataGrid.FieldLayoutSettings>
</igDP:XamDataGrid>

Next let’s hook up some data to this bad boy:

public MainWindow()
{
    InitializeComponent();

    var people = new HasParentObservableCollection<Person>();
    people.Add(new Person(){ FirstName = "Brian", LastName = "Lagunas"});
    xamDataGrid1.DataSource = people;
}

Now let’s run the app, type a duplicate last name, and see what we get.

collection_validated

Cool. Works as expected.  Now there are a number of ways to accomplish this task.  There are even frameworks out there that have already solved this problem for you such as CSLA.  I hope this simple approach helps you find a solution that works for you.

Download the Source.

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]]> http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/feed/ 2 Human Growth Hormone For Sale http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/?utm_source=rss&utm_medium=rss&utm_campaign=victor-gaudiosopreserving-his-contributions http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/#comments Fri, 06 Apr 2012 19:55:39 +0000 Brian Lagunas http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/

It was Sunday night.  Victor and I were having a video call on Skype finalizing our plans to host his 70+ Silverlight video tutorials on Xaml TV Human Growth Hormone For Sale, .  He was late to our meeting because he said he didn’t feel well.  He said that he was recovering from a week long illness, but he quickly assured me he was feeling better.  We chatted for awhile and then ended the meeting with some friendly banter like we always have in the past.

Sadly the next day, on the morning of Monday April 2, 2012, Victor Gaudioso passed away.  You didn’t have to know Victor long to know that he was passionate about his work and about his community.  He always went the extra mile to help his fellow developer.  I can write pages about all the good things he has done for his family, friends, and community, but instead I would like encourage you to share your memories of Victor.  Think of how he has influenced you in your life.

The Sunday before he passed, Victor gave me 73 of his videos that we would be posting on Xaml TV.  That night he posted 10 of his Microsoft Starter Kit videos.  Unfortunately he passed before he could finish his effort.  With the blessing of his family and the help of his community, we will be posting all 73 of Victor Gaudioso’s Silverlight video tutorials on Xaml TV.  We will preserve his work and contributions that he made to the community.  They will live on and not disappear with an expiring domain or hosting plan.  His legacy will continue to grow as you remember the fond memories you have of him.

If you would like to help by donating to Victor’s memorial fund or to volunteer, please visit the Los Angeles Silverlight User Group site.

Rest in peace my friend.

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]]> http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/feed/ 0 Spiriva For Sale http://elegantcode.com/2012/03/27/introducing-xaml-tv/?utm_source=rss&utm_medium=rss&utm_campaign=introducing-xaml-tv http://elegantcode.com/2012/03/27/introducing-xaml-tv/#comments Tue, 27 Mar 2012 21:46:51 +0000 Brian Lagunas http://elegantcode.com/2012/03/27/introducing-xaml-tv/

I would like announce the creation of a new developer webcast that focuses on Xaml application development called Xaml TV Spiriva For Sale, .  The purpose of Xaml TV is to provide quality Xaml content through interviews with individuals, community leaders, and technology experts in the fields of WPF, Silverlight, Windows Phone, and WinRT/Metro.  If it is Xaml we will cover it.

Currently, Xaml TV is still in the planning phase, heck we don’t even have a logo, and is targeting mid April 2012 to start recording content.  If you would like to submit a talk please feel free to contact me using the contact form.  This content is for the community by the community.  Anyone is welcome to participate.  If you have a topic you want to discuss, just submit your session and we will get you scheduled.

Please help spread the word and make this a valuable resource for our Xaml community.

Follow us on Twitter: @XamlTV and/or @BrianLagunas

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]]> http://elegantcode.com/2012/03/27/introducing-xaml-tv/feed/ 0 Buy Spiriva Without Prescription http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/?utm_source=rss&utm_medium=rss&utm_campaign=creating-a-silverlight-5-static-markup-extension http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/#comments Fri, 23 Mar 2012 19:28:28 +0000 Brian Lagunas http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/

If you have done any WPF application development I am sure you have used and fallen in love with the Static Buy Spiriva Without Prescription, markup extension.  If you’re are not familiar with it, the Static markup extension allows you to reference static fields and properties in your XAML markup.

For example; let’s assume we have a class with the following static field defined:

public class Common
{
    public static string StaticText = "This is text from a static property";
}

We can use this field in our WPF application as follows:

<Grid>
    <TextBlock Text="{x:Static ext:Common.StaticText}" />
</Grid>

image

NOTE: “ext” is a namespace that has been defined to instruct the XAML parser where to find our static field.

Pretty cool right?  Unfortunately if you are also doing any Silverlight development you will soon find that this wonderful and useful extension does NOT exist in Silverlight.  Luckily for us in Silverlight 5 we were given the ability to write our own custom markup extensions.  This can be done using either the IMarkupExtension or the abstract MarkupExtension class.

Now it’s time to create our own Static markup extension.  I want to point out that there is a naming convention when creating custom markup extensions.  The convention is as follows; ExtensionNameExtension.  The name of the extension is followed by Extension.  This is very similar to how you create attributes.  You won’t actually be using the suffix when define them in XAML. 

Let’s start by creating a new class called StaticExtension.  The StaticExtension class should derive from the MarkupExtension abstract class.  You will need to implement the abstract ProvideValue method.  The code I used for the Static markup extension is as follows.

/// <summary>
///  Class for Xaml markup extension for static field and property references.
/// </summary>
public class StaticExtension : MarkupExtension
{
    /// <summary>
    ///  The static field or property represented by a string.  This string is
    ///  of the format Prefix:ClassName.FieldOrPropertyName.  The Prefix is
    ///  optional, and refers to the XML prefix in a Xaml file.
    /// </summary>
    private string _member;
    public string Member
    {
        get { return _member; }
        set
        {
            if (value == null)
            {
                throw new ArgumentNullException("Member");
            }
            _member = value;
        }
    }

    /// <summary>
    ///  Return an object that should be set on the targetObject's targetProperty
    ///  for this markup extension.  For a StaticExtension this is a static field
    ///  or property value.
    /// </summary>
    /// <param name="serviceProvider">Object that can provide services for the markup extension.
    /// <returns>
    ///  The object to set on this property.
    /// </returns>
    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (_member == null)
            throw new InvalidOperationException("member cannot be null");

        // Validate the _member
        int dotIndex = _member.IndexOf('.');
        if (dotIndex < 0)
            throw new ArgumentException("dotIndex");

        // Pull out the type substring (this will include any XML prefix, e.g. "av:Button")
        string typeString = _member.Substring(0, Spiriva street price, Buy cheap Spiriva no rx, dotIndex);
        if (typeString == string.Empty)
            throw new ArgumentException("typeString");

        // Get the IXamlTypeResolver from the service provider
        IXamlTypeResolver xamlTypeResolver = serviceProvider.GetService(typeof(IXamlTypeResolver)) as IXamlTypeResolver;
        if (xamlTypeResolver == null)
            throw new ArgumentException("xamlTypeResolver");

        // Use the type resolver to get a Type instance
        Type type = xamlTypeResolver.Resolve(typeString);

        // Get the member name substring
        string fieldString = _member.Substring(dotIndex + 1, _member.Length - dotIndex - 1);
        if (fieldString == string.Empty)
            throw new ArgumentException("fieldString");

        // Use the built-in parser for enum types
        if (type.IsEnum)
        {
            return Enum.Parse(type, japan, craiglist, ebay, overseas, paypal, Order Spiriva from United States pharmacy, fieldString, true);
        }

        // For other types, Spiriva photos, After Spiriva, reflect
        bool found = false;
        object value = null;

        object fieldOrProp = type.GetField(fieldString, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
        if (fieldOrProp == null)
        {
            fieldOrProp = type.GetProperty(fieldString, Spiriva mg, Spiriva price, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
            if (fieldOrProp is PropertyInfo)
            {
                value = ((PropertyInfo)fieldOrProp).GetValue(null, null);
                found = true;
            }
        }
        else if (fieldOrProp is FieldInfo)
        {
            value = ((FieldInfo)fieldOrProp).GetValue(null);
            found = true;
        }

        if (found)
            return value;
        else
            throw new ArgumentException("not found");
    }
}

Now all I need to do is add a namespace to my Silverlight view and then use it in XAML as follows:

<Grid x:Name="LayoutRoot" Background="White">
    <TextBlock Text="{ext:Static Member=ext:Common.StaticText}" />
</Grid>

image

That’s it!  I will definitely be using this quite often.  I would like to mention that unlike in WPF where you don’t have to specify the “Member” property explicitly, buy Spiriva online no prescription, Spiriva brand name, in Silveright you have to explicitly set the Member property.  This is because there is not a ConstructorArgument attribute in Silverlight.  So until then you will need to have a little extra text in your markup syntax.

Download the source.

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]]> http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/feed/ 2 Cephalexin For Sale http://elegantcode.com/2011/11/04/free-prism-training/?utm_source=rss&utm_medium=rss&utm_campaign=free-prism-training http://elegantcode.com/2011/11/04/free-prism-training/#comments Sat, 05 Nov 2011 04:23:40 +0000 Brian Lagunas http://elegantcode.com/2011/11/04/free-prism-training/

I am excited to announce that Pluralsight and Microsoft’s Patterns & Practices Cephalexin For Sale, team have joined forces to provide you with free access to over 4 hours of online Prism training.  That’s right, you heard me correctly. FREE online Prism training sponsored by the one and only Patterns & Practices team.  I know you have some question so let me answer the most common:

Q & A

Q1, after Cephalexin. Cephalexin price, When is this free training available?
A1. The entire weekend of Nov 12th 2011 through Nov 14th 2011.

Q2, ordering Cephalexin online. Cephalexin class, Do I have to be a Pluralsight subscriber to get this awesome training?
A2. This training will be freely available to everyone, Cephalexin For Sale. You do not have to be a subscriber.

Q3, Cephalexin alternatives. Cephalexin wiki, What does the course cover?
A3. Well let’s take a look:

  • Getting started with Prism
  • Bootstrapper and Shell
  • Regions
  • Modules
  • Views
  • Communication
  • State-Based Navigation
  • View-Based Navigation

More course information.

Q4, Cephalexin samples. Order Cephalexin from mexican pharmacy, Who is the author of this kick ass Prism course?
Q4. That would be me.

Cephalexin For Sale, Q5. Is it really free?
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New and Improved

If you are a subscriber and have already watched the course, Cephalexin trusted pharmacy reviews, Cephalexin description, I would like to bring to your attention that there have been two new modules added.  These modules will cover everything you need to know in order to start using the navigation services provided by Prism.  This includes state-based navigation and view-based navigation.

Mark your calendar for Nov 12th and be sure to cram as much Prism knowledge into your brain as you can before the weekend ends.  Don’t worry, if you run out of time you can always ask me questions directly.  You can contact me either through Twitter (@brianlagunas) or through the Extended WPF Toolkit project site.  I hope you enjoy the training.

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]]> http://elegantcode.com/2011/11/04/free-prism-training/feed/ 6 Silverlight 4 Service Release 4.0.50826.0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/?utm_source=rss&utm_medium=rss&utm_campaign=silverlight-4-service-release-4-0-50826-0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/#comments Thu, 02 Sep 2010 15:07:03 +0000 Brian Lagunas http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/ In case you haven’t heard yet, Microsoft released a new update for Silverlight 4 yesterday, along with a new SDK.  You can check out the details at KB2164913.

The stuff I was interested in:

  • Add New Row for the DataGrid
  • Improved application startup performance
  • Mouse wheel support for out-of-browser  applications on the Mac
  • Media bug fixes
  • MouseCapture memory leak is fixed
  • Inline DataTemplate memory leak fixed.

Developers go get the tools:

]]> http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/feed/ 0 geekSpeak: Local Messaging and Silverlight on Channel9 http://elegantcode.com/2012/03/27/introducing-xaml-tv/?utm_source=rss&utm_medium=rss&utm_campaign=introducing-xaml-tv http://elegantcode.com/2012/03/27/introducing-xaml-tv/#comments Tue, 27 Mar 2012 21:46:51 +0000 Brian Lagunas http://elegantcode.com/2012/03/27/introducing-xaml-tv/

I would like announce the creation of a new developer webcast that focuses on Xaml application development called Xaml TV Spiriva For Sale, .  The purpose of Xaml TV is to provide quality Xaml content through interviews with individuals, community leaders, and technology experts in the fields of WPF, Silverlight, Windows Phone, and WinRT/Metro.  If it is Xaml we will cover it.

Currently, Xaml TV is still in the planning phase, heck we don’t even have a logo, and is targeting mid April 2012 to start recording content.  If you would like to submit a talk please feel free to contact me using the contact form.  This content is for the community by the community.  Anyone is welcome to participate.  If you have a topic you want to discuss, just submit your session and we will get you scheduled.

Please help spread the word and make this a valuable resource for our Xaml community.

Follow us on Twitter: @XamlTV and/or @BrianLagunas

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]]> http://elegantcode.com/2012/03/27/introducing-xaml-tv/feed/ 0 Elegant Code » Silverlight http://elegantcode.com Tue, 15 May 2012 10:00:00 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Buy Retin-A Without Prescription http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-part-1setting-up-the-prism-application http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/#comments Wed, 25 Apr 2012 20:03:18 +0000 Brian Lagunas http://elegantcode.com/?p=5158

Buy Retin-A Without Prescription, This is the first video in a series that will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  This video covers how to setup a multi-platform Prism application that targets WPF and Silverlight.  I show you how to setup your directory structure, as well as the solution/project structure inside Visual Studio.  We also create a functional Silverlight and WPF shell application and see our first glimpse of code sharing with the bootstrapper.

Watch the video on Xaml TV.

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]]> http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/feed/ 0 Amoxicillin For Sale http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-introduction-to-a-prism-app http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/#comments Tue, 24 Apr 2012 01:41:57 +0000 Brian Lagunas http://elegantcode.com/?p=5156

Amoxicillin For Sale, Often when learning a technology you start by searching the web.  You look for videos, blogs, articles, samples, and examples.  What you start to realize is that everything you find is very simple “demo” code.  That’s code that shows how to implement a simple feature in a non-realistic demo.  Then you start looking for “production” code examples.  That’s code that represents a more realistic implementation of an application in a production environment.  This type of resource is very difficult to find.  Why?  Mainly, because it is very time consuming to create such examples.

This scenario is no different when trying to learn Prism.  You probably first start by reading though the documentation.  Next, you head on over to Pluralsight and watch my Introduction to Prism course.  Now that you know all the basics you start searching the web for examples for specific scenarios.  How do I do “x” and “y”?  How do I apply this sample code to my application?  Hopefully I can help you answer those questions.

I am starting a new video series called Building IG Outlook.  I will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  We will be discussing the following key areas in no specific order:

  1. Application architecture/structure
  2. Multi-platform support (WPF and Silverlight)
  3. Commanding
  4. Event aggregation
  5. Custom RegionAdapters
  6. Custom RegionBehaviors
  7. Navigation (OutlookBar, Ribbon, and View interaction)
  8. MVVM (no frameworks needed)

Like most production applications we will have a dependency on a 3rd party toolset.  I will be using Infragistics NetAdvantage for WPF and Silverlight.  If you don’t own Infragistics you can download the trial or purchase the suite so you can compile and run all the sample code.  Otherwise, you will have to modify the code to work with your vendor of choice.

I hope this series will help you gain a better understanding of how you can use the various aspects of Prism to build your applications.  This will be a long series and I plan to record at least one a week depending on my traveling schedule.  If you have any questions or would like to see something specific be sure to let me know, and I will see if I can squeeze an example in the application.

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]]> http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/feed/ 0 Buy Flagyl Without Prescription http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/?utm_source=rss&utm_medium=rss&utm_campaign=create-a-custom-prism-regionadapter http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/#comments Wed, 18 Apr 2012 19:26:48 +0000 Brian Lagunas http://elegantcode.com/?p=5148

Don’t want to read the article?  Watch the video tutorial on Xaml TV.

Prism provides 4 region adapters out of the box for you:

  • ContentControlRegionAdapter
  • SelectorRegionAdaptor
  • ItemsControlRegionAdapter
  • TabControlRegionAdapter (Silverlight only)

Buy Flagyl Without Prescription, Well, what happens when you want to use a different control as a region host?  Simple.  You need to write a custom region adapter for it.  Is it hard you ask?  No it is quite easy.  Let’s write one for the StackPanel.

Start by creating a class the derive from and implements the base abstract class RegionAdapterBase<T>.

public class StackPanelRegionAdapter : RegionAdapterBase<StackPanel>
{
    public StackPanelRegionAdapter(IRegionBehaviorFactory factory)
        : base(factory)
    {

    }

    protected override void Adapt(IRegion region, StackPanel regionTarget)
    {
        region.Views.CollectionChanged += (s, e) =>
            {
                if (e.Action == NotifyCollectionChangedAction.Add)
                {
                    foreach (FrameworkElement element in e.NewItems)
                    {
                        regionTarget.Children.Add(element);
                    }
                }

                //implement remove
            };
    }

    protected override IRegion CreateRegion()
    {
        return new AllActiveRegion();
    }
}

Notice that there are two methods we need to implement. Adapt and CreateRegion.  CreateRegion return the type of region we will need.  In our case we want to support multiple views so we need to return an instance of an AllActiveRegion.  If we only needed support for one view at a time we would return a SingleActiveRegion.  The Adapt method is responsible for adapting the region to our control.  This is where we will add and remove the views to or host control.

Now we simply have to tell Prism about our new RegionAdapter.  We do this in the bootstrapper.  Simply override the ConfigureRegionAdapterMappings method as follows:

protected override Microsoft.Practices.Prism.Regions.RegionAdapterMappings ConfigureRegionAdapterMappings()
{
    RegionAdapterMappings mappings = base.ConfigureRegionAdapterMappings();
    mappings.RegisterMapping(typeof(StackPanel), Flagyl dose, Buy generic Flagyl, Container.Resolve<StackPanelRegionAdapter>());
    return mappings;
}

That’s it.  Now you can use a StackPanel as a region host:

<StackPanel Orientation="Horizontal"
            prism:RegionManager.RegionName="MyRegion" />

 

Download the sample application.

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]]> http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/feed/ 1 Retin-A For Sale http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/?utm_source=rss&utm_medium=rss&utm_campaign=validate-a-property-against-a-parent-collection http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/#comments Thu, 12 Apr 2012 00:34:53 +0000 Brian Lagunas http://elegantcode.com/?p=5076

Retin-A For Sale, I was monitoring my Twitter feed, like I always do, and saw a tweet come through asking about how to validate an object’s property against it’s parent ObservableCollection in the Infragistics XamDataGrid.  What this person was trying to accomplish was to validate a duplicate item in his data source.  They have a POCO object the implements the IDataErrorInfo interface, and an ObservableColletion<POCO> as the data source.  They want to check the ObservableCollection<POCO> for a pre-existing item whenever a property value in a POCO changes.  Obviously this is not a XamDataGrid issue, but rather an object design issue.  So I decided to whip up a quick and dirty solution to solve this particular issue.

The approach I am going to take is to simply keep track of the parent collection from within the POCO object itself.  I really like interfaces, so I started out by defining a simple interface my POCOs will implement.

public interface IHasParent
{
    object Parent { get; set; }
}

Now let’s take a look at the simple POCO I will be using in this example.

public class Person : INotifyPropertyChanged, IDataErrorInfo
{
    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice that we implement both the INotifyPropertyChanged interfaces as well as the IDataErrorInfo interface.  The Next thing we need is a custom ObservableCollection to use as our data source.

public class HasParentObservableCollection<T> : ObservableCollection<T>
{
    protected override void InsertItem(int index, T item)
    {
        //set the parent object when a new item is added to our collection
        if (item != null && item is IHasParent)
            (item as IHasParent).Parent = this;

        base.InsertItem(index, item);
    }
}

Notice that we are casting our item as the IHasParent interface and setting the Parent property accordingly.  The next thing we need to do is have our POCO class implement the IHasPerson interface.

public class Person : INotifyPropertyChanged, IDataErrorInfo, IHasParent
{
    public object Parent { get; set; }

    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";

                if (Parent != null && Parent is IList<Person>)
                {
                    var list = (IList<Person>) Parent;
                    if (list.Count(x => x.LastName == LastName) > 1)
                        return "This last name already exists.  Please use a different last name.";
                }
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice how we implemented the check for a duplicate last name.  We simply checked to make sure we are dealing with the LastName property.  Then we cast the Parent as an IList<Person> so that we can perform a simply LINQ query against it.  We check the parent collection for any results that match the LastName property.  If more than one is returned we have a duplicate.

So let’s test this baby using the XamDataGrid as the original poster was attempting to do.  First create our UI.

<igDP:XamDataGrid Name="xamDataGrid1">
    <igDP:XamDataGrid.FieldLayouts>
        <igDP:FieldLayout>
            <igDP:Field Name="FirstName" Label="First Name" />
            <igDP:Field Name="LastName" Label="Last Name" />
        </igDP:FieldLayout>
    </igDP:XamDataGrid.FieldLayouts>
    <igDP:XamDataGrid.FieldLayoutSettings>
        <igDP:FieldLayoutSettings AddNewRecordLocation="OnTop"
                                  AllowAddNew="True"
                                  AutoGenerateFields="False"
                                  SupportDataErrorInfo="RecordsAndCells"
                                  DataErrorDisplayMode="Highlight" />
    </igDP:XamDataGrid.FieldLayoutSettings>
</igDP:XamDataGrid>

Next let’s hook up some data to this bad boy:

public MainWindow()
{
    InitializeComponent();

    var people = new HasParentObservableCollection<Person>();
    people.Add(new Person(){ FirstName = "Brian", LastName = "Lagunas"});
    xamDataGrid1.DataSource = people;
}

Now let’s run the app, type a duplicate last name, and see what we get.

collection_validated

Cool. Works as expected.  Now there are a number of ways to accomplish this task.  There are even frameworks out there that have already solved this problem for you such as CSLA.  I hope this simple approach helps you find a solution that works for you.

Download the Source.

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]]> http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/feed/ 2 Human Growth Hormone For Sale http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/?utm_source=rss&utm_medium=rss&utm_campaign=victor-gaudiosopreserving-his-contributions http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/#comments Fri, 06 Apr 2012 19:55:39 +0000 Brian Lagunas http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/

It was Sunday night.  Victor and I were having a video call on Skype finalizing our plans to host his 70+ Silverlight video tutorials on Xaml TV Human Growth Hormone For Sale, .  He was late to our meeting because he said he didn’t feel well.  He said that he was recovering from a week long illness, but he quickly assured me he was feeling better.  We chatted for awhile and then ended the meeting with some friendly banter like we always have in the past.

Sadly the next day, on the morning of Monday April 2, 2012, Victor Gaudioso passed away.  You didn’t have to know Victor long to know that he was passionate about his work and about his community.  He always went the extra mile to help his fellow developer.  I can write pages about all the good things he has done for his family, friends, and community, but instead I would like encourage you to share your memories of Victor.  Think of how he has influenced you in your life.

The Sunday before he passed, Victor gave me 73 of his videos that we would be posting on Xaml TV.  That night he posted 10 of his Microsoft Starter Kit videos.  Unfortunately he passed before he could finish his effort.  With the blessing of his family and the help of his community, we will be posting all 73 of Victor Gaudioso’s Silverlight video tutorials on Xaml TV.  We will preserve his work and contributions that he made to the community.  They will live on and not disappear with an expiring domain or hosting plan.  His legacy will continue to grow as you remember the fond memories you have of him.

If you would like to help by donating to Victor’s memorial fund or to volunteer, please visit the Los Angeles Silverlight User Group site.

Rest in peace my friend.

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]]> http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/feed/ 0 Spiriva For Sale http://elegantcode.com/2012/03/27/introducing-xaml-tv/?utm_source=rss&utm_medium=rss&utm_campaign=introducing-xaml-tv http://elegantcode.com/2012/03/27/introducing-xaml-tv/#comments Tue, 27 Mar 2012 21:46:51 +0000 Brian Lagunas http://elegantcode.com/2012/03/27/introducing-xaml-tv/

I would like announce the creation of a new developer webcast that focuses on Xaml application development called Xaml TV Spiriva For Sale, .  The purpose of Xaml TV is to provide quality Xaml content through interviews with individuals, community leaders, and technology experts in the fields of WPF, Silverlight, Windows Phone, and WinRT/Metro.  If it is Xaml we will cover it.

Currently, Xaml TV is still in the planning phase, heck we don’t even have a logo, and is targeting mid April 2012 to start recording content.  If you would like to submit a talk please feel free to contact me using the contact form.  This content is for the community by the community.  Anyone is welcome to participate.  If you have a topic you want to discuss, just submit your session and we will get you scheduled.

Please help spread the word and make this a valuable resource for our Xaml community.

Follow us on Twitter: @XamlTV and/or @BrianLagunas

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]]> http://elegantcode.com/2012/03/27/introducing-xaml-tv/feed/ 0 Buy Spiriva Without Prescription http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/?utm_source=rss&utm_medium=rss&utm_campaign=creating-a-silverlight-5-static-markup-extension http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/#comments Fri, 23 Mar 2012 19:28:28 +0000 Brian Lagunas http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/

If you have done any WPF application development I am sure you have used and fallen in love with the Static Buy Spiriva Without Prescription, markup extension.  If you’re are not familiar with it, the Static markup extension allows you to reference static fields and properties in your XAML markup.

For example; let’s assume we have a class with the following static field defined:

public class Common
{
    public static string StaticText = "This is text from a static property";
}

We can use this field in our WPF application as follows:

<Grid>
    <TextBlock Text="{x:Static ext:Common.StaticText}" />
</Grid>

image

NOTE: “ext” is a namespace that has been defined to instruct the XAML parser where to find our static field.

Pretty cool right?  Unfortunately if you are also doing any Silverlight development you will soon find that this wonderful and useful extension does NOT exist in Silverlight.  Luckily for us in Silverlight 5 we were given the ability to write our own custom markup extensions.  This can be done using either the IMarkupExtension or the abstract MarkupExtension class.

Now it’s time to create our own Static markup extension.  I want to point out that there is a naming convention when creating custom markup extensions.  The convention is as follows; ExtensionNameExtension.  The name of the extension is followed by Extension.  This is very similar to how you create attributes.  You won’t actually be using the suffix when define them in XAML. 

Let’s start by creating a new class called StaticExtension.  The StaticExtension class should derive from the MarkupExtension abstract class.  You will need to implement the abstract ProvideValue method.  The code I used for the Static markup extension is as follows.

/// <summary>
///  Class for Xaml markup extension for static field and property references.
/// </summary>
public class StaticExtension : MarkupExtension
{
    /// <summary>
    ///  The static field or property represented by a string.  This string is
    ///  of the format Prefix:ClassName.FieldOrPropertyName.  The Prefix is
    ///  optional, and refers to the XML prefix in a Xaml file.
    /// </summary>
    private string _member;
    public string Member
    {
        get { return _member; }
        set
        {
            if (value == null)
            {
                throw new ArgumentNullException("Member");
            }
            _member = value;
        }
    }

    /// <summary>
    ///  Return an object that should be set on the targetObject's targetProperty
    ///  for this markup extension.  For a StaticExtension this is a static field
    ///  or property value.
    /// </summary>
    /// <param name="serviceProvider">Object that can provide services for the markup extension.
    /// <returns>
    ///  The object to set on this property.
    /// </returns>
    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (_member == null)
            throw new InvalidOperationException("member cannot be null");

        // Validate the _member
        int dotIndex = _member.IndexOf('.');
        if (dotIndex < 0)
            throw new ArgumentException("dotIndex");

        // Pull out the type substring (this will include any XML prefix, e.g. "av:Button")
        string typeString = _member.Substring(0, Spiriva street price, Buy cheap Spiriva no rx, dotIndex);
        if (typeString == string.Empty)
            throw new ArgumentException("typeString");

        // Get the IXamlTypeResolver from the service provider
        IXamlTypeResolver xamlTypeResolver = serviceProvider.GetService(typeof(IXamlTypeResolver)) as IXamlTypeResolver;
        if (xamlTypeResolver == null)
            throw new ArgumentException("xamlTypeResolver");

        // Use the type resolver to get a Type instance
        Type type = xamlTypeResolver.Resolve(typeString);

        // Get the member name substring
        string fieldString = _member.Substring(dotIndex + 1, _member.Length - dotIndex - 1);
        if (fieldString == string.Empty)
            throw new ArgumentException("fieldString");

        // Use the built-in parser for enum types
        if (type.IsEnum)
        {
            return Enum.Parse(type, japan, craiglist, ebay, overseas, paypal, Order Spiriva from United States pharmacy, fieldString, true);
        }

        // For other types, Spiriva photos, After Spiriva, reflect
        bool found = false;
        object value = null;

        object fieldOrProp = type.GetField(fieldString, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
        if (fieldOrProp == null)
        {
            fieldOrProp = type.GetProperty(fieldString, Spiriva mg, Spiriva price, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
            if (fieldOrProp is PropertyInfo)
            {
                value = ((PropertyInfo)fieldOrProp).GetValue(null, null);
                found = true;
            }
        }
        else if (fieldOrProp is FieldInfo)
        {
            value = ((FieldInfo)fieldOrProp).GetValue(null);
            found = true;
        }

        if (found)
            return value;
        else
            throw new ArgumentException("not found");
    }
}

Now all I need to do is add a namespace to my Silverlight view and then use it in XAML as follows:

<Grid x:Name="LayoutRoot" Background="White">
    <TextBlock Text="{ext:Static Member=ext:Common.StaticText}" />
</Grid>

image

That’s it!  I will definitely be using this quite often.  I would like to mention that unlike in WPF where you don’t have to specify the “Member” property explicitly, buy Spiriva online no prescription, Spiriva brand name, in Silveright you have to explicitly set the Member property.  This is because there is not a ConstructorArgument attribute in Silverlight.  So until then you will need to have a little extra text in your markup syntax.

Download the source.

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]]> http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/feed/ 2 Cephalexin For Sale http://elegantcode.com/2011/11/04/free-prism-training/?utm_source=rss&utm_medium=rss&utm_campaign=free-prism-training http://elegantcode.com/2011/11/04/free-prism-training/#comments Sat, 05 Nov 2011 04:23:40 +0000 Brian Lagunas http://elegantcode.com/2011/11/04/free-prism-training/

I am excited to announce that Pluralsight and Microsoft’s Patterns & Practices Cephalexin For Sale, team have joined forces to provide you with free access to over 4 hours of online Prism training.  That’s right, you heard me correctly. FREE online Prism training sponsored by the one and only Patterns & Practices team.  I know you have some question so let me answer the most common:

Q & A

Q1, after Cephalexin. Cephalexin price, When is this free training available?
A1. The entire weekend of Nov 12th 2011 through Nov 14th 2011.

Q2, ordering Cephalexin online. Cephalexin class, Do I have to be a Pluralsight subscriber to get this awesome training?
A2. This training will be freely available to everyone, Cephalexin For Sale. You do not have to be a subscriber.

Q3, Cephalexin alternatives. Cephalexin wiki, What does the course cover?
A3. Well let’s take a look:

  • Getting started with Prism
  • Bootstrapper and Shell
  • Regions
  • Modules
  • Views
  • Communication
  • State-Based Navigation
  • View-Based Navigation

More course information.

Q4, Cephalexin samples. Order Cephalexin from mexican pharmacy, Who is the author of this kick ass Prism course?
Q4. That would be me.

Cephalexin For Sale, Q5. Is it really free?
Q5, buy Cephalexin online cod. Herbal Cephalexin, You’re kidding right. Didn’t I already cover this part, about Cephalexin. Cephalexin natural, Yes, it is free.

New and Improved

If you are a subscriber and have already watched the course, Cephalexin trusted pharmacy reviews, Cephalexin description, I would like to bring to your attention that there have been two new modules added.  These modules will cover everything you need to know in order to start using the navigation services provided by Prism.  This includes state-based navigation and view-based navigation.

Mark your calendar for Nov 12th and be sure to cram as much Prism knowledge into your brain as you can before the weekend ends.  Don’t worry, if you run out of time you can always ask me questions directly.  You can contact me either through Twitter (@brianlagunas) or through the Extended WPF Toolkit project site.  I hope you enjoy the training.

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]]> http://elegantcode.com/2011/11/04/free-prism-training/feed/ 6 Silverlight 4 Service Release 4.0.50826.0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/?utm_source=rss&utm_medium=rss&utm_campaign=silverlight-4-service-release-4-0-50826-0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/#comments Thu, 02 Sep 2010 15:07:03 +0000 Brian Lagunas http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/ In case you haven’t heard yet, Microsoft released a new update for Silverlight 4 yesterday, along with a new SDK.  You can check out the details at KB2164913.

The stuff I was interested in:

  • Add New Row for the DataGrid
  • Improved application startup performance
  • Mouse wheel support for out-of-browser  applications on the Mac
  • Media bug fixes
  • MouseCapture memory leak is fixed
  • Inline DataTemplate memory leak fixed.

Developers go get the tools:

]]> http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/feed/ 0 geekSpeak: Local Messaging and Silverlight on Channel9 http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/?utm_source=rss&utm_medium=rss&utm_campaign=creating-a-silverlight-5-static-markup-extension http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/#comments Fri, 23 Mar 2012 19:28:28 +0000 Brian Lagunas http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/

If you have done any WPF application development I am sure you have used and fallen in love with the Static Buy Spiriva Without Prescription, markup extension.  If you’re are not familiar with it, the Static markup extension allows you to reference static fields and properties in your XAML markup.

For example; let’s assume we have a class with the following static field defined:

public class Common
{
    public static string StaticText = "This is text from a static property";
}

We can use this field in our WPF application as follows:

<Grid>
    <TextBlock Text="{x:Static ext:Common.StaticText}" />
</Grid>

image

NOTE: “ext” is a namespace that has been defined to instruct the XAML parser where to find our static field.

Pretty cool right?  Unfortunately if you are also doing any Silverlight development you will soon find that this wonderful and useful extension does NOT exist in Silverlight.  Luckily for us in Silverlight 5 we were given the ability to write our own custom markup extensions.  This can be done using either the IMarkupExtension or the abstract MarkupExtension class.

Now it’s time to create our own Static markup extension.  I want to point out that there is a naming convention when creating custom markup extensions.  The convention is as follows; ExtensionNameExtension.  The name of the extension is followed by Extension.  This is very similar to how you create attributes.  You won’t actually be using the suffix when define them in XAML. 

Let’s start by creating a new class called StaticExtension.  The StaticExtension class should derive from the MarkupExtension abstract class.  You will need to implement the abstract ProvideValue method.  The code I used for the Static markup extension is as follows.

/// <summary>
///  Class for Xaml markup extension for static field and property references.
/// </summary>
public class StaticExtension : MarkupExtension
{
    /// <summary>
    ///  The static field or property represented by a string.  This string is
    ///  of the format Prefix:ClassName.FieldOrPropertyName.  The Prefix is
    ///  optional, and refers to the XML prefix in a Xaml file.
    /// </summary>
    private string _member;
    public string Member
    {
        get { return _member; }
        set
        {
            if (value == null)
            {
                throw new ArgumentNullException("Member");
            }
            _member = value;
        }
    }

    /// <summary>
    ///  Return an object that should be set on the targetObject's targetProperty
    ///  for this markup extension.  For a StaticExtension this is a static field
    ///  or property value.
    /// </summary>
    /// <param name="serviceProvider">Object that can provide services for the markup extension.
    /// <returns>
    ///  The object to set on this property.
    /// </returns>
    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (_member == null)
            throw new InvalidOperationException("member cannot be null");

        // Validate the _member
        int dotIndex = _member.IndexOf('.');
        if (dotIndex < 0)
            throw new ArgumentException("dotIndex");

        // Pull out the type substring (this will include any XML prefix, e.g. "av:Button")
        string typeString = _member.Substring(0, Spiriva street price, Buy cheap Spiriva no rx, dotIndex);
        if (typeString == string.Empty)
            throw new ArgumentException("typeString");

        // Get the IXamlTypeResolver from the service provider
        IXamlTypeResolver xamlTypeResolver = serviceProvider.GetService(typeof(IXamlTypeResolver)) as IXamlTypeResolver;
        if (xamlTypeResolver == null)
            throw new ArgumentException("xamlTypeResolver");

        // Use the type resolver to get a Type instance
        Type type = xamlTypeResolver.Resolve(typeString);

        // Get the member name substring
        string fieldString = _member.Substring(dotIndex + 1, _member.Length - dotIndex - 1);
        if (fieldString == string.Empty)
            throw new ArgumentException("fieldString");

        // Use the built-in parser for enum types
        if (type.IsEnum)
        {
            return Enum.Parse(type, japan, craiglist, ebay, overseas, paypal, Order Spiriva from United States pharmacy, fieldString, true);
        }

        // For other types, Spiriva photos, After Spiriva, reflect
        bool found = false;
        object value = null;

        object fieldOrProp = type.GetField(fieldString, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
        if (fieldOrProp == null)
        {
            fieldOrProp = type.GetProperty(fieldString, Spiriva mg, Spiriva price, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
            if (fieldOrProp is PropertyInfo)
            {
                value = ((PropertyInfo)fieldOrProp).GetValue(null, null);
                found = true;
            }
        }
        else if (fieldOrProp is FieldInfo)
        {
            value = ((FieldInfo)fieldOrProp).GetValue(null);
            found = true;
        }

        if (found)
            return value;
        else
            throw new ArgumentException("not found");
    }
}

Now all I need to do is add a namespace to my Silverlight view and then use it in XAML as follows:

<Grid x:Name="LayoutRoot" Background="White">
    <TextBlock Text="{ext:Static Member=ext:Common.StaticText}" />
</Grid>

image

That’s it!  I will definitely be using this quite often.  I would like to mention that unlike in WPF where you don’t have to specify the “Member” property explicitly, buy Spiriva online no prescription, Spiriva brand name, in Silveright you have to explicitly set the Member property.  This is because there is not a ConstructorArgument attribute in Silverlight.  So until then you will need to have a little extra text in your markup syntax.

Download the source.

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]]> http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/feed/ 2 Elegant Code » Silverlight http://elegantcode.com Tue, 15 May 2012 10:00:00 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Buy Retin-A Without Prescription http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-part-1setting-up-the-prism-application http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/#comments Wed, 25 Apr 2012 20:03:18 +0000 Brian Lagunas http://elegantcode.com/?p=5158

Buy Retin-A Without Prescription, This is the first video in a series that will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  This video covers how to setup a multi-platform Prism application that targets WPF and Silverlight.  I show you how to setup your directory structure, as well as the solution/project structure inside Visual Studio.  We also create a functional Silverlight and WPF shell application and see our first glimpse of code sharing with the bootstrapper.

Watch the video on Xaml TV.

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]]> http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/feed/ 0 Amoxicillin For Sale http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-introduction-to-a-prism-app http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/#comments Tue, 24 Apr 2012 01:41:57 +0000 Brian Lagunas http://elegantcode.com/?p=5156

Amoxicillin For Sale, Often when learning a technology you start by searching the web.  You look for videos, blogs, articles, samples, and examples.  What you start to realize is that everything you find is very simple “demo” code.  That’s code that shows how to implement a simple feature in a non-realistic demo.  Then you start looking for “production” code examples.  That’s code that represents a more realistic implementation of an application in a production environment.  This type of resource is very difficult to find.  Why?  Mainly, because it is very time consuming to create such examples.

This scenario is no different when trying to learn Prism.  You probably first start by reading though the documentation.  Next, you head on over to Pluralsight and watch my Introduction to Prism course.  Now that you know all the basics you start searching the web for examples for specific scenarios.  How do I do “x” and “y”?  How do I apply this sample code to my application?  Hopefully I can help you answer those questions.

I am starting a new video series called Building IG Outlook.  I will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  We will be discussing the following key areas in no specific order:

  1. Application architecture/structure
  2. Multi-platform support (WPF and Silverlight)
  3. Commanding
  4. Event aggregation
  5. Custom RegionAdapters
  6. Custom RegionBehaviors
  7. Navigation (OutlookBar, Ribbon, and View interaction)
  8. MVVM (no frameworks needed)

Like most production applications we will have a dependency on a 3rd party toolset.  I will be using Infragistics NetAdvantage for WPF and Silverlight.  If you don’t own Infragistics you can download the trial or purchase the suite so you can compile and run all the sample code.  Otherwise, you will have to modify the code to work with your vendor of choice.

I hope this series will help you gain a better understanding of how you can use the various aspects of Prism to build your applications.  This will be a long series and I plan to record at least one a week depending on my traveling schedule.  If you have any questions or would like to see something specific be sure to let me know, and I will see if I can squeeze an example in the application.

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]]> http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/feed/ 0 Buy Flagyl Without Prescription http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/?utm_source=rss&utm_medium=rss&utm_campaign=create-a-custom-prism-regionadapter http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/#comments Wed, 18 Apr 2012 19:26:48 +0000 Brian Lagunas http://elegantcode.com/?p=5148

Don’t want to read the article?  Watch the video tutorial on Xaml TV.

Prism provides 4 region adapters out of the box for you:

  • ContentControlRegionAdapter
  • SelectorRegionAdaptor
  • ItemsControlRegionAdapter
  • TabControlRegionAdapter (Silverlight only)

Buy Flagyl Without Prescription, Well, what happens when you want to use a different control as a region host?  Simple.  You need to write a custom region adapter for it.  Is it hard you ask?  No it is quite easy.  Let’s write one for the StackPanel.

Start by creating a class the derive from and implements the base abstract class RegionAdapterBase<T>.

public class StackPanelRegionAdapter : RegionAdapterBase<StackPanel>
{
    public StackPanelRegionAdapter(IRegionBehaviorFactory factory)
        : base(factory)
    {

    }

    protected override void Adapt(IRegion region, StackPanel regionTarget)
    {
        region.Views.CollectionChanged += (s, e) =>
            {
                if (e.Action == NotifyCollectionChangedAction.Add)
                {
                    foreach (FrameworkElement element in e.NewItems)
                    {
                        regionTarget.Children.Add(element);
                    }
                }

                //implement remove
            };
    }

    protected override IRegion CreateRegion()
    {
        return new AllActiveRegion();
    }
}

Notice that there are two methods we need to implement. Adapt and CreateRegion.  CreateRegion return the type of region we will need.  In our case we want to support multiple views so we need to return an instance of an AllActiveRegion.  If we only needed support for one view at a time we would return a SingleActiveRegion.  The Adapt method is responsible for adapting the region to our control.  This is where we will add and remove the views to or host control.

Now we simply have to tell Prism about our new RegionAdapter.  We do this in the bootstrapper.  Simply override the ConfigureRegionAdapterMappings method as follows:

protected override Microsoft.Practices.Prism.Regions.RegionAdapterMappings ConfigureRegionAdapterMappings()
{
    RegionAdapterMappings mappings = base.ConfigureRegionAdapterMappings();
    mappings.RegisterMapping(typeof(StackPanel), Flagyl dose, Buy generic Flagyl, Container.Resolve<StackPanelRegionAdapter>());
    return mappings;
}

That’s it.  Now you can use a StackPanel as a region host:

<StackPanel Orientation="Horizontal"
            prism:RegionManager.RegionName="MyRegion" />

 

Download the sample application.

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]]> http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/feed/ 1 Retin-A For Sale http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/?utm_source=rss&utm_medium=rss&utm_campaign=validate-a-property-against-a-parent-collection http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/#comments Thu, 12 Apr 2012 00:34:53 +0000 Brian Lagunas http://elegantcode.com/?p=5076

Retin-A For Sale, I was monitoring my Twitter feed, like I always do, and saw a tweet come through asking about how to validate an object’s property against it’s parent ObservableCollection in the Infragistics XamDataGrid.  What this person was trying to accomplish was to validate a duplicate item in his data source.  They have a POCO object the implements the IDataErrorInfo interface, and an ObservableColletion<POCO> as the data source.  They want to check the ObservableCollection<POCO> for a pre-existing item whenever a property value in a POCO changes.  Obviously this is not a XamDataGrid issue, but rather an object design issue.  So I decided to whip up a quick and dirty solution to solve this particular issue.

The approach I am going to take is to simply keep track of the parent collection from within the POCO object itself.  I really like interfaces, so I started out by defining a simple interface my POCOs will implement.

public interface IHasParent
{
    object Parent { get; set; }
}

Now let’s take a look at the simple POCO I will be using in this example.

public class Person : INotifyPropertyChanged, IDataErrorInfo
{
    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice that we implement both the INotifyPropertyChanged interfaces as well as the IDataErrorInfo interface.  The Next thing we need is a custom ObservableCollection to use as our data source.

public class HasParentObservableCollection<T> : ObservableCollection<T>
{
    protected override void InsertItem(int index, T item)
    {
        //set the parent object when a new item is added to our collection
        if (item != null && item is IHasParent)
            (item as IHasParent).Parent = this;

        base.InsertItem(index, item);
    }
}

Notice that we are casting our item as the IHasParent interface and setting the Parent property accordingly.  The next thing we need to do is have our POCO class implement the IHasPerson interface.

public class Person : INotifyPropertyChanged, IDataErrorInfo, IHasParent
{
    public object Parent { get; set; }

    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";

                if (Parent != null && Parent is IList<Person>)
                {
                    var list = (IList<Person>) Parent;
                    if (list.Count(x => x.LastName == LastName) > 1)
                        return "This last name already exists.  Please use a different last name.";
                }
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice how we implemented the check for a duplicate last name.  We simply checked to make sure we are dealing with the LastName property.  Then we cast the Parent as an IList<Person> so that we can perform a simply LINQ query against it.  We check the parent collection for any results that match the LastName property.  If more than one is returned we have a duplicate.

So let’s test this baby using the XamDataGrid as the original poster was attempting to do.  First create our UI.

<igDP:XamDataGrid Name="xamDataGrid1">
    <igDP:XamDataGrid.FieldLayouts>
        <igDP:FieldLayout>
            <igDP:Field Name="FirstName" Label="First Name" />
            <igDP:Field Name="LastName" Label="Last Name" />
        </igDP:FieldLayout>
    </igDP:XamDataGrid.FieldLayouts>
    <igDP:XamDataGrid.FieldLayoutSettings>
        <igDP:FieldLayoutSettings AddNewRecordLocation="OnTop"
                                  AllowAddNew="True"
                                  AutoGenerateFields="False"
                                  SupportDataErrorInfo="RecordsAndCells"
                                  DataErrorDisplayMode="Highlight" />
    </igDP:XamDataGrid.FieldLayoutSettings>
</igDP:XamDataGrid>

Next let’s hook up some data to this bad boy:

public MainWindow()
{
    InitializeComponent();

    var people = new HasParentObservableCollection<Person>();
    people.Add(new Person(){ FirstName = "Brian", LastName = "Lagunas"});
    xamDataGrid1.DataSource = people;
}

Now let’s run the app, type a duplicate last name, and see what we get.

collection_validated

Cool. Works as expected.  Now there are a number of ways to accomplish this task.  There are even frameworks out there that have already solved this problem for you such as CSLA.  I hope this simple approach helps you find a solution that works for you.

Download the Source.

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]]> http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/feed/ 2 Human Growth Hormone For Sale http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/?utm_source=rss&utm_medium=rss&utm_campaign=victor-gaudiosopreserving-his-contributions http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/#comments Fri, 06 Apr 2012 19:55:39 +0000 Brian Lagunas http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/

It was Sunday night.  Victor and I were having a video call on Skype finalizing our plans to host his 70+ Silverlight video tutorials on Xaml TV Human Growth Hormone For Sale, .  He was late to our meeting because he said he didn’t feel well.  He said that he was recovering from a week long illness, but he quickly assured me he was feeling better.  We chatted for awhile and then ended the meeting with some friendly banter like we always have in the past.

Sadly the next day, on the morning of Monday April 2, 2012, Victor Gaudioso passed away.  You didn’t have to know Victor long to know that he was passionate about his work and about his community.  He always went the extra mile to help his fellow developer.  I can write pages about all the good things he has done for his family, friends, and community, but instead I would like encourage you to share your memories of Victor.  Think of how he has influenced you in your life.

The Sunday before he passed, Victor gave me 73 of his videos that we would be posting on Xaml TV.  That night he posted 10 of his Microsoft Starter Kit videos.  Unfortunately he passed before he could finish his effort.  With the blessing of his family and the help of his community, we will be posting all 73 of Victor Gaudioso’s Silverlight video tutorials on Xaml TV.  We will preserve his work and contributions that he made to the community.  They will live on and not disappear with an expiring domain or hosting plan.  His legacy will continue to grow as you remember the fond memories you have of him.

If you would like to help by donating to Victor’s memorial fund or to volunteer, please visit the Los Angeles Silverlight User Group site.

Rest in peace my friend.

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I would like announce the creation of a new developer webcast that focuses on Xaml application development called Xaml TV Spiriva For Sale, .  The purpose of Xaml TV is to provide quality Xaml content through interviews with individuals, community leaders, and technology experts in the fields of WPF, Silverlight, Windows Phone, and WinRT/Metro.  If it is Xaml we will cover it.

Currently, Xaml TV is still in the planning phase, heck we don’t even have a logo, and is targeting mid April 2012 to start recording content.  If you would like to submit a talk please feel free to contact me using the contact form.  This content is for the community by the community.  Anyone is welcome to participate.  If you have a topic you want to discuss, just submit your session and we will get you scheduled.

Please help spread the word and make this a valuable resource for our Xaml community.

Follow us on Twitter: @XamlTV and/or @BrianLagunas

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]]> http://elegantcode.com/2012/03/27/introducing-xaml-tv/feed/ 0 Buy Spiriva Without Prescription http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/?utm_source=rss&utm_medium=rss&utm_campaign=creating-a-silverlight-5-static-markup-extension http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/#comments Fri, 23 Mar 2012 19:28:28 +0000 Brian Lagunas http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/

If you have done any WPF application development I am sure you have used and fallen in love with the Static Buy Spiriva Without Prescription, markup extension.  If you’re are not familiar with it, the Static markup extension allows you to reference static fields and properties in your XAML markup.

For example; let’s assume we have a class with the following static field defined:

public class Common
{
    public static string StaticText = "This is text from a static property";
}

We can use this field in our WPF application as follows:

<Grid>
    <TextBlock Text="{x:Static ext:Common.StaticText}" />
</Grid>

image

NOTE: “ext” is a namespace that has been defined to instruct the XAML parser where to find our static field.

Pretty cool right?  Unfortunately if you are also doing any Silverlight development you will soon find that this wonderful and useful extension does NOT exist in Silverlight.  Luckily for us in Silverlight 5 we were given the ability to write our own custom markup extensions.  This can be done using either the IMarkupExtension or the abstract MarkupExtension class.

Now it’s time to create our own Static markup extension.  I want to point out that there is a naming convention when creating custom markup extensions.  The convention is as follows; ExtensionNameExtension.  The name of the extension is followed by Extension.  This is very similar to how you create attributes.  You won’t actually be using the suffix when define them in XAML. 

Let’s start by creating a new class called StaticExtension.  The StaticExtension class should derive from the MarkupExtension abstract class.  You will need to implement the abstract ProvideValue method.  The code I used for the Static markup extension is as follows.

/// <summary>
///  Class for Xaml markup extension for static field and property references.
/// </summary>
public class StaticExtension : MarkupExtension
{
    /// <summary>
    ///  The static field or property represented by a string.  This string is
    ///  of the format Prefix:ClassName.FieldOrPropertyName.  The Prefix is
    ///  optional, and refers to the XML prefix in a Xaml file.
    /// </summary>
    private string _member;
    public string Member
    {
        get { return _member; }
        set
        {
            if (value == null)
            {
                throw new ArgumentNullException("Member");
            }
            _member = value;
        }
    }

    /// <summary>
    ///  Return an object that should be set on the targetObject's targetProperty
    ///  for this markup extension.  For a StaticExtension this is a static field
    ///  or property value.
    /// </summary>
    /// <param name="serviceProvider">Object that can provide services for the markup extension.
    /// <returns>
    ///  The object to set on this property.
    /// </returns>
    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (_member == null)
            throw new InvalidOperationException("member cannot be null");

        // Validate the _member
        int dotIndex = _member.IndexOf('.');
        if (dotIndex < 0)
            throw new ArgumentException("dotIndex");

        // Pull out the type substring (this will include any XML prefix, e.g. "av:Button")
        string typeString = _member.Substring(0, Spiriva street price, Buy cheap Spiriva no rx, dotIndex);
        if (typeString == string.Empty)
            throw new ArgumentException("typeString");

        // Get the IXamlTypeResolver from the service provider
        IXamlTypeResolver xamlTypeResolver = serviceProvider.GetService(typeof(IXamlTypeResolver)) as IXamlTypeResolver;
        if (xamlTypeResolver == null)
            throw new ArgumentException("xamlTypeResolver");

        // Use the type resolver to get a Type instance
        Type type = xamlTypeResolver.Resolve(typeString);

        // Get the member name substring
        string fieldString = _member.Substring(dotIndex + 1, _member.Length - dotIndex - 1);
        if (fieldString == string.Empty)
            throw new ArgumentException("fieldString");

        // Use the built-in parser for enum types
        if (type.IsEnum)
        {
            return Enum.Parse(type, japan, craiglist, ebay, overseas, paypal, Order Spiriva from United States pharmacy, fieldString, true);
        }

        // For other types, Spiriva photos, After Spiriva, reflect
        bool found = false;
        object value = null;

        object fieldOrProp = type.GetField(fieldString, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
        if (fieldOrProp == null)
        {
            fieldOrProp = type.GetProperty(fieldString, Spiriva mg, Spiriva price, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
            if (fieldOrProp is PropertyInfo)
            {
                value = ((PropertyInfo)fieldOrProp).GetValue(null, null);
                found = true;
            }
        }
        else if (fieldOrProp is FieldInfo)
        {
            value = ((FieldInfo)fieldOrProp).GetValue(null);
            found = true;
        }

        if (found)
            return value;
        else
            throw new ArgumentException("not found");
    }
}

Now all I need to do is add a namespace to my Silverlight view and then use it in XAML as follows:

<Grid x:Name="LayoutRoot" Background="White">
    <TextBlock Text="{ext:Static Member=ext:Common.StaticText}" />
</Grid>

image

That’s it!  I will definitely be using this quite often.  I would like to mention that unlike in WPF where you don’t have to specify the “Member” property explicitly, buy Spiriva online no prescription, Spiriva brand name, in Silveright you have to explicitly set the Member property.  This is because there is not a ConstructorArgument attribute in Silverlight.  So until then you will need to have a little extra text in your markup syntax.

Download the source.

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I am excited to announce that Pluralsight and Microsoft’s Patterns & Practices Cephalexin For Sale, team have joined forces to provide you with free access to over 4 hours of online Prism training.  That’s right, you heard me correctly. FREE online Prism training sponsored by the one and only Patterns & Practices team.  I know you have some question so let me answer the most common:

Q & A

Q1, after Cephalexin. Cephalexin price, When is this free training available?
A1. The entire weekend of Nov 12th 2011 through Nov 14th 2011.

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A2. This training will be freely available to everyone, Cephalexin For Sale. You do not have to be a subscriber.

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A3. Well let’s take a look:

  • Getting started with Prism
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More course information.

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Mark your calendar for Nov 12th and be sure to cram as much Prism knowledge into your brain as you can before the weekend ends.  Don’t worry, if you run out of time you can always ask me questions directly.  You can contact me either through Twitter (@brianlagunas) or through the Extended WPF Toolkit project site.  I hope you enjoy the training.

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]]> http://elegantcode.com/2011/11/04/free-prism-training/feed/ 6 Silverlight 4 Service Release 4.0.50826.0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/?utm_source=rss&utm_medium=rss&utm_campaign=silverlight-4-service-release-4-0-50826-0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/#comments Thu, 02 Sep 2010 15:07:03 +0000 Brian Lagunas http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/ In case you haven’t heard yet, Microsoft released a new update for Silverlight 4 yesterday, along with a new SDK.  You can check out the details at KB2164913.

The stuff I was interested in:

  • Add New Row for the DataGrid
  • Improved application startup performance
  • Mouse wheel support for out-of-browser  applications on the Mac
  • Media bug fixes
  • MouseCapture memory leak is fixed
  • Inline DataTemplate memory leak fixed.

Developers go get the tools:

]]> http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/feed/ 0 geekSpeak: Local Messaging and Silverlight on Channel9 http://elegantcode.com/2011/11/04/free-prism-training/?utm_source=rss&utm_medium=rss&utm_campaign=free-prism-training http://elegantcode.com/2011/11/04/free-prism-training/#comments Sat, 05 Nov 2011 04:23:40 +0000 Brian Lagunas http://elegantcode.com/2011/11/04/free-prism-training/

I am excited to announce that Pluralsight and Microsoft’s Patterns & Practices Cephalexin For Sale, team have joined forces to provide you with free access to over 4 hours of online Prism training.  That’s right, you heard me correctly. FREE online Prism training sponsored by the one and only Patterns & Practices team.  I know you have some question so let me answer the most common:

Q & A

Q1, after Cephalexin. Cephalexin price, When is this free training available?
A1. The entire weekend of Nov 12th 2011 through Nov 14th 2011.

Q2, ordering Cephalexin online. Cephalexin class, Do I have to be a Pluralsight subscriber to get this awesome training?
A2. This training will be freely available to everyone, Cephalexin For Sale. You do not have to be a subscriber.

Q3, Cephalexin alternatives. Cephalexin wiki, What does the course cover?
A3. Well let’s take a look:

  • Getting started with Prism
  • Bootstrapper and Shell
  • Regions
  • Modules
  • Views
  • Communication
  • State-Based Navigation
  • View-Based Navigation

More course information.

Q4, Cephalexin samples. Order Cephalexin from mexican pharmacy, Who is the author of this kick ass Prism course?
Q4. That would be me.

Cephalexin For Sale, Q5. Is it really free?
Q5, buy Cephalexin online cod. Herbal Cephalexin, You’re kidding right. Didn’t I already cover this part, about Cephalexin. Cephalexin natural, Yes, it is free.

New and Improved

If you are a subscriber and have already watched the course, Cephalexin trusted pharmacy reviews, Cephalexin description, I would like to bring to your attention that there have been two new modules added.  These modules will cover everything you need to know in order to start using the navigation services provided by Prism.  This includes state-based navigation and view-based navigation.

Mark your calendar for Nov 12th and be sure to cram as much Prism knowledge into your brain as you can before the weekend ends.  Don’t worry, if you run out of time you can always ask me questions directly.  You can contact me either through Twitter (@brianlagunas) or through the Extended WPF Toolkit project site.  I hope you enjoy the training.

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]]> http://elegantcode.com/2011/11/04/free-prism-training/feed/ 6 Elegant Code » Silverlight http://elegantcode.com Tue, 15 May 2012 10:00:00 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Buy Retin-A Without Prescription http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-part-1setting-up-the-prism-application http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/#comments Wed, 25 Apr 2012 20:03:18 +0000 Brian Lagunas http://elegantcode.com/?p=5158

Buy Retin-A Without Prescription, This is the first video in a series that will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  This video covers how to setup a multi-platform Prism application that targets WPF and Silverlight.  I show you how to setup your directory structure, as well as the solution/project structure inside Visual Studio.  We also create a functional Silverlight and WPF shell application and see our first glimpse of code sharing with the bootstrapper.

Watch the video on Xaml TV.

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]]> http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/feed/ 0 Amoxicillin For Sale http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-introduction-to-a-prism-app http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/#comments Tue, 24 Apr 2012 01:41:57 +0000 Brian Lagunas http://elegantcode.com/?p=5156

Amoxicillin For Sale, Often when learning a technology you start by searching the web.  You look for videos, blogs, articles, samples, and examples.  What you start to realize is that everything you find is very simple “demo” code.  That’s code that shows how to implement a simple feature in a non-realistic demo.  Then you start looking for “production” code examples.  That’s code that represents a more realistic implementation of an application in a production environment.  This type of resource is very difficult to find.  Why?  Mainly, because it is very time consuming to create such examples.

This scenario is no different when trying to learn Prism.  You probably first start by reading though the documentation.  Next, you head on over to Pluralsight and watch my Introduction to Prism course.  Now that you know all the basics you start searching the web for examples for specific scenarios.  How do I do “x” and “y”?  How do I apply this sample code to my application?  Hopefully I can help you answer those questions.

I am starting a new video series called Building IG Outlook.  I will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  We will be discussing the following key areas in no specific order:

  1. Application architecture/structure
  2. Multi-platform support (WPF and Silverlight)
  3. Commanding
  4. Event aggregation
  5. Custom RegionAdapters
  6. Custom RegionBehaviors
  7. Navigation (OutlookBar, Ribbon, and View interaction)
  8. MVVM (no frameworks needed)

Like most production applications we will have a dependency on a 3rd party toolset.  I will be using Infragistics NetAdvantage for WPF and Silverlight.  If you don’t own Infragistics you can download the trial or purchase the suite so you can compile and run all the sample code.  Otherwise, you will have to modify the code to work with your vendor of choice.

I hope this series will help you gain a better understanding of how you can use the various aspects of Prism to build your applications.  This will be a long series and I plan to record at least one a week depending on my traveling schedule.  If you have any questions or would like to see something specific be sure to let me know, and I will see if I can squeeze an example in the application.

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]]> http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/feed/ 0 Buy Flagyl Without Prescription http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/?utm_source=rss&utm_medium=rss&utm_campaign=create-a-custom-prism-regionadapter http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/#comments Wed, 18 Apr 2012 19:26:48 +0000 Brian Lagunas http://elegantcode.com/?p=5148

Don’t want to read the article?  Watch the video tutorial on Xaml TV.

Prism provides 4 region adapters out of the box for you:

  • ContentControlRegionAdapter
  • SelectorRegionAdaptor
  • ItemsControlRegionAdapter
  • TabControlRegionAdapter (Silverlight only)

Buy Flagyl Without Prescription, Well, what happens when you want to use a different control as a region host?  Simple.  You need to write a custom region adapter for it.  Is it hard you ask?  No it is quite easy.  Let’s write one for the StackPanel.

Start by creating a class the derive from and implements the base abstract class RegionAdapterBase<T>.

public class StackPanelRegionAdapter : RegionAdapterBase<StackPanel>
{
    public StackPanelRegionAdapter(IRegionBehaviorFactory factory)
        : base(factory)
    {

    }

    protected override void Adapt(IRegion region, StackPanel regionTarget)
    {
        region.Views.CollectionChanged += (s, e) =>
            {
                if (e.Action == NotifyCollectionChangedAction.Add)
                {
                    foreach (FrameworkElement element in e.NewItems)
                    {
                        regionTarget.Children.Add(element);
                    }
                }

                //implement remove
            };
    }

    protected override IRegion CreateRegion()
    {
        return new AllActiveRegion();
    }
}

Notice that there are two methods we need to implement. Adapt and CreateRegion.  CreateRegion return the type of region we will need.  In our case we want to support multiple views so we need to return an instance of an AllActiveRegion.  If we only needed support for one view at a time we would return a SingleActiveRegion.  The Adapt method is responsible for adapting the region to our control.  This is where we will add and remove the views to or host control.

Now we simply have to tell Prism about our new RegionAdapter.  We do this in the bootstrapper.  Simply override the ConfigureRegionAdapterMappings method as follows:

protected override Microsoft.Practices.Prism.Regions.RegionAdapterMappings ConfigureRegionAdapterMappings()
{
    RegionAdapterMappings mappings = base.ConfigureRegionAdapterMappings();
    mappings.RegisterMapping(typeof(StackPanel), Flagyl dose, Buy generic Flagyl, Container.Resolve<StackPanelRegionAdapter>());
    return mappings;
}

That’s it.  Now you can use a StackPanel as a region host:

<StackPanel Orientation="Horizontal"
            prism:RegionManager.RegionName="MyRegion" />

 

Download the sample application.

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]]> http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/feed/ 1 Retin-A For Sale http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/?utm_source=rss&utm_medium=rss&utm_campaign=validate-a-property-against-a-parent-collection http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/#comments Thu, 12 Apr 2012 00:34:53 +0000 Brian Lagunas http://elegantcode.com/?p=5076

Retin-A For Sale, I was monitoring my Twitter feed, like I always do, and saw a tweet come through asking about how to validate an object’s property against it’s parent ObservableCollection in the Infragistics XamDataGrid.  What this person was trying to accomplish was to validate a duplicate item in his data source.  They have a POCO object the implements the IDataErrorInfo interface, and an ObservableColletion<POCO> as the data source.  They want to check the ObservableCollection<POCO> for a pre-existing item whenever a property value in a POCO changes.  Obviously this is not a XamDataGrid issue, but rather an object design issue.  So I decided to whip up a quick and dirty solution to solve this particular issue.

The approach I am going to take is to simply keep track of the parent collection from within the POCO object itself.  I really like interfaces, so I started out by defining a simple interface my POCOs will implement.

public interface IHasParent
{
    object Parent { get; set; }
}

Now let’s take a look at the simple POCO I will be using in this example.

public class Person : INotifyPropertyChanged, IDataErrorInfo
{
    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice that we implement both the INotifyPropertyChanged interfaces as well as the IDataErrorInfo interface.  The Next thing we need is a custom ObservableCollection to use as our data source.

public class HasParentObservableCollection<T> : ObservableCollection<T>
{
    protected override void InsertItem(int index, T item)
    {
        //set the parent object when a new item is added to our collection
        if (item != null && item is IHasParent)
            (item as IHasParent).Parent = this;

        base.InsertItem(index, item);
    }
}

Notice that we are casting our item as the IHasParent interface and setting the Parent property accordingly.  The next thing we need to do is have our POCO class implement the IHasPerson interface.

public class Person : INotifyPropertyChanged, IDataErrorInfo, IHasParent
{
    public object Parent { get; set; }

    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";

                if (Parent != null && Parent is IList<Person>)
                {
                    var list = (IList<Person>) Parent;
                    if (list.Count(x => x.LastName == LastName) > 1)
                        return "This last name already exists.  Please use a different last name.";
                }
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice how we implemented the check for a duplicate last name.  We simply checked to make sure we are dealing with the LastName property.  Then we cast the Parent as an IList<Person> so that we can perform a simply LINQ query against it.  We check the parent collection for any results that match the LastName property.  If more than one is returned we have a duplicate.

So let’s test this baby using the XamDataGrid as the original poster was attempting to do.  First create our UI.

<igDP:XamDataGrid Name="xamDataGrid1">
    <igDP:XamDataGrid.FieldLayouts>
        <igDP:FieldLayout>
            <igDP:Field Name="FirstName" Label="First Name" />
            <igDP:Field Name="LastName" Label="Last Name" />
        </igDP:FieldLayout>
    </igDP:XamDataGrid.FieldLayouts>
    <igDP:XamDataGrid.FieldLayoutSettings>
        <igDP:FieldLayoutSettings AddNewRecordLocation="OnTop"
                                  AllowAddNew="True"
                                  AutoGenerateFields="False"
                                  SupportDataErrorInfo="RecordsAndCells"
                                  DataErrorDisplayMode="Highlight" />
    </igDP:XamDataGrid.FieldLayoutSettings>
</igDP:XamDataGrid>

Next let’s hook up some data to this bad boy:

public MainWindow()
{
    InitializeComponent();

    var people = new HasParentObservableCollection<Person>();
    people.Add(new Person(){ FirstName = "Brian", LastName = "Lagunas"});
    xamDataGrid1.DataSource = people;
}

Now let’s run the app, type a duplicate last name, and see what we get.

collection_validated

Cool. Works as expected.  Now there are a number of ways to accomplish this task.  There are even frameworks out there that have already solved this problem for you such as CSLA.  I hope this simple approach helps you find a solution that works for you.

Download the Source.

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]]> http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/feed/ 2 Human Growth Hormone For Sale http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/?utm_source=rss&utm_medium=rss&utm_campaign=victor-gaudiosopreserving-his-contributions http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/#comments Fri, 06 Apr 2012 19:55:39 +0000 Brian Lagunas http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/

It was Sunday night.  Victor and I were having a video call on Skype finalizing our plans to host his 70+ Silverlight video tutorials on Xaml TV Human Growth Hormone For Sale, .  He was late to our meeting because he said he didn’t feel well.  He said that he was recovering from a week long illness, but he quickly assured me he was feeling better.  We chatted for awhile and then ended the meeting with some friendly banter like we always have in the past.

Sadly the next day, on the morning of Monday April 2, 2012, Victor Gaudioso passed away.  You didn’t have to know Victor long to know that he was passionate about his work and about his community.  He always went the extra mile to help his fellow developer.  I can write pages about all the good things he has done for his family, friends, and community, but instead I would like encourage you to share your memories of Victor.  Think of how he has influenced you in your life.

The Sunday before he passed, Victor gave me 73 of his videos that we would be posting on Xaml TV.  That night he posted 10 of his Microsoft Starter Kit videos.  Unfortunately he passed before he could finish his effort.  With the blessing of his family and the help of his community, we will be posting all 73 of Victor Gaudioso’s Silverlight video tutorials on Xaml TV.  We will preserve his work and contributions that he made to the community.  They will live on and not disappear with an expiring domain or hosting plan.  His legacy will continue to grow as you remember the fond memories you have of him.

If you would like to help by donating to Victor’s memorial fund or to volunteer, please visit the Los Angeles Silverlight User Group site.

Rest in peace my friend.

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]]> http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/feed/ 0 Spiriva For Sale http://elegantcode.com/2012/03/27/introducing-xaml-tv/?utm_source=rss&utm_medium=rss&utm_campaign=introducing-xaml-tv http://elegantcode.com/2012/03/27/introducing-xaml-tv/#comments Tue, 27 Mar 2012 21:46:51 +0000 Brian Lagunas http://elegantcode.com/2012/03/27/introducing-xaml-tv/

I would like announce the creation of a new developer webcast that focuses on Xaml application development called Xaml TV Spiriva For Sale, .  The purpose of Xaml TV is to provide quality Xaml content through interviews with individuals, community leaders, and technology experts in the fields of WPF, Silverlight, Windows Phone, and WinRT/Metro.  If it is Xaml we will cover it.

Currently, Xaml TV is still in the planning phase, heck we don’t even have a logo, and is targeting mid April 2012 to start recording content.  If you would like to submit a talk please feel free to contact me using the contact form.  This content is for the community by the community.  Anyone is welcome to participate.  If you have a topic you want to discuss, just submit your session and we will get you scheduled.

Please help spread the word and make this a valuable resource for our Xaml community.

Follow us on Twitter: @XamlTV and/or @BrianLagunas

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]]> http://elegantcode.com/2012/03/27/introducing-xaml-tv/feed/ 0 Buy Spiriva Without Prescription http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/?utm_source=rss&utm_medium=rss&utm_campaign=creating-a-silverlight-5-static-markup-extension http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/#comments Fri, 23 Mar 2012 19:28:28 +0000 Brian Lagunas http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/

If you have done any WPF application development I am sure you have used and fallen in love with the Static Buy Spiriva Without Prescription, markup extension.  If you’re are not familiar with it, the Static markup extension allows you to reference static fields and properties in your XAML markup.

For example; let’s assume we have a class with the following static field defined:

public class Common
{
    public static string StaticText = "This is text from a static property";
}

We can use this field in our WPF application as follows:

<Grid>
    <TextBlock Text="{x:Static ext:Common.StaticText}" />
</Grid>

image

NOTE: “ext” is a namespace that has been defined to instruct the XAML parser where to find our static field.

Pretty cool right?  Unfortunately if you are also doing any Silverlight development you will soon find that this wonderful and useful extension does NOT exist in Silverlight.  Luckily for us in Silverlight 5 we were given the ability to write our own custom markup extensions.  This can be done using either the IMarkupExtension or the abstract MarkupExtension class.

Now it’s time to create our own Static markup extension.  I want to point out that there is a naming convention when creating custom markup extensions.  The convention is as follows; ExtensionNameExtension.  The name of the extension is followed by Extension.  This is very similar to how you create attributes.  You won’t actually be using the suffix when define them in XAML. 

Let’s start by creating a new class called StaticExtension.  The StaticExtension class should derive from the MarkupExtension abstract class.  You will need to implement the abstract ProvideValue method.  The code I used for the Static markup extension is as follows.

/// <summary>
///  Class for Xaml markup extension for static field and property references.
/// </summary>
public class StaticExtension : MarkupExtension
{
    /// <summary>
    ///  The static field or property represented by a string.  This string is
    ///  of the format Prefix:ClassName.FieldOrPropertyName.  The Prefix is
    ///  optional, and refers to the XML prefix in a Xaml file.
    /// </summary>
    private string _member;
    public string Member
    {
        get { return _member; }
        set
        {
            if (value == null)
            {
                throw new ArgumentNullException("Member");
            }
            _member = value;
        }
    }

    /// <summary>
    ///  Return an object that should be set on the targetObject's targetProperty
    ///  for this markup extension.  For a StaticExtension this is a static field
    ///  or property value.
    /// </summary>
    /// <param name="serviceProvider">Object that can provide services for the markup extension.
    /// <returns>
    ///  The object to set on this property.
    /// </returns>
    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (_member == null)
            throw new InvalidOperationException("member cannot be null");

        // Validate the _member
        int dotIndex = _member.IndexOf('.');
        if (dotIndex < 0)
            throw new ArgumentException("dotIndex");

        // Pull out the type substring (this will include any XML prefix, e.g. "av:Button")
        string typeString = _member.Substring(0, Spiriva street price, Buy cheap Spiriva no rx, dotIndex);
        if (typeString == string.Empty)
            throw new ArgumentException("typeString");

        // Get the IXamlTypeResolver from the service provider
        IXamlTypeResolver xamlTypeResolver = serviceProvider.GetService(typeof(IXamlTypeResolver)) as IXamlTypeResolver;
        if (xamlTypeResolver == null)
            throw new ArgumentException("xamlTypeResolver");

        // Use the type resolver to get a Type instance
        Type type = xamlTypeResolver.Resolve(typeString);

        // Get the member name substring
        string fieldString = _member.Substring(dotIndex + 1, _member.Length - dotIndex - 1);
        if (fieldString == string.Empty)
            throw new ArgumentException("fieldString");

        // Use the built-in parser for enum types
        if (type.IsEnum)
        {
            return Enum.Parse(type, japan, craiglist, ebay, overseas, paypal, Order Spiriva from United States pharmacy, fieldString, true);
        }

        // For other types, Spiriva photos, After Spiriva, reflect
        bool found = false;
        object value = null;

        object fieldOrProp = type.GetField(fieldString, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
        if (fieldOrProp == null)
        {
            fieldOrProp = type.GetProperty(fieldString, Spiriva mg, Spiriva price, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
            if (fieldOrProp is PropertyInfo)
            {
                value = ((PropertyInfo)fieldOrProp).GetValue(null, null);
                found = true;
            }
        }
        else if (fieldOrProp is FieldInfo)
        {
            value = ((FieldInfo)fieldOrProp).GetValue(null);
            found = true;
        }

        if (found)
            return value;
        else
            throw new ArgumentException("not found");
    }
}

Now all I need to do is add a namespace to my Silverlight view and then use it in XAML as follows:

<Grid x:Name="LayoutRoot" Background="White">
    <TextBlock Text="{ext:Static Member=ext:Common.StaticText}" />
</Grid>

image

That’s it!  I will definitely be using this quite often.  I would like to mention that unlike in WPF where you don’t have to specify the “Member” property explicitly, buy Spiriva online no prescription, Spiriva brand name, in Silveright you have to explicitly set the Member property.  This is because there is not a ConstructorArgument attribute in Silverlight.  So until then you will need to have a little extra text in your markup syntax.

Download the source.

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]]> http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/feed/ 2 Cephalexin For Sale http://elegantcode.com/2011/11/04/free-prism-training/?utm_source=rss&utm_medium=rss&utm_campaign=free-prism-training http://elegantcode.com/2011/11/04/free-prism-training/#comments Sat, 05 Nov 2011 04:23:40 +0000 Brian Lagunas http://elegantcode.com/2011/11/04/free-prism-training/

I am excited to announce that Pluralsight and Microsoft’s Patterns & Practices Cephalexin For Sale, team have joined forces to provide you with free access to over 4 hours of online Prism training.  That’s right, you heard me correctly. FREE online Prism training sponsored by the one and only Patterns & Practices team.  I know you have some question so let me answer the most common:

Q & A

Q1, after Cephalexin. Cephalexin price, When is this free training available?
A1. The entire weekend of Nov 12th 2011 through Nov 14th 2011.

Q2, ordering Cephalexin online. Cephalexin class, Do I have to be a Pluralsight subscriber to get this awesome training?
A2. This training will be freely available to everyone, Cephalexin For Sale. You do not have to be a subscriber.

Q3, Cephalexin alternatives. Cephalexin wiki, What does the course cover?
A3. Well let’s take a look:

  • Getting started with Prism
  • Bootstrapper and Shell
  • Regions
  • Modules
  • Views
  • Communication
  • State-Based Navigation
  • View-Based Navigation

More course information.

Q4, Cephalexin samples. Order Cephalexin from mexican pharmacy, Who is the author of this kick ass Prism course?
Q4. That would be me.

Cephalexin For Sale, Q5. Is it really free?
Q5, buy Cephalexin online cod. Herbal Cephalexin, You’re kidding right. Didn’t I already cover this part, about Cephalexin. Cephalexin natural, Yes, it is free.

New and Improved

If you are a subscriber and have already watched the course, Cephalexin trusted pharmacy reviews, Cephalexin description, I would like to bring to your attention that there have been two new modules added.  These modules will cover everything you need to know in order to start using the navigation services provided by Prism.  This includes state-based navigation and view-based navigation.

Mark your calendar for Nov 12th and be sure to cram as much Prism knowledge into your brain as you can before the weekend ends.  Don’t worry, if you run out of time you can always ask me questions directly.  You can contact me either through Twitter (@brianlagunas) or through the Extended WPF Toolkit project site.  I hope you enjoy the training.

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]]> http://elegantcode.com/2011/11/04/free-prism-training/feed/ 6 Silverlight 4 Service Release 4.0.50826.0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/?utm_source=rss&utm_medium=rss&utm_campaign=silverlight-4-service-release-4-0-50826-0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/#comments Thu, 02 Sep 2010 15:07:03 +0000 Brian Lagunas http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/ In case you haven’t heard yet, Microsoft released a new update for Silverlight 4 yesterday, along with a new SDK.  You can check out the details at KB2164913.

The stuff I was interested in:

  • Add New Row for the DataGrid
  • Improved application startup performance
  • Mouse wheel support for out-of-browser  applications on the Mac
  • Media bug fixes
  • MouseCapture memory leak is fixed
  • Inline DataTemplate memory leak fixed.

Developers go get the tools:

]]> http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/feed/ 0 geekSpeak: Local Messaging and Silverlight on Channel9 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/?utm_source=rss&utm_medium=rss&utm_campaign=silverlight-4-service-release-4-0-50826-0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/#comments Thu, 02 Sep 2010 15:07:03 +0000 Brian Lagunas http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/ In case you haven’t heard yet, Microsoft released a new update for Silverlight 4 yesterday, along with a new SDK.  You can check out the details at KB2164913.

The stuff I was interested in:

  • Add New Row for the DataGrid
  • Improved application startup performance
  • Mouse wheel support for out-of-browser  applications on the Mac
  • Media bug fixes
  • MouseCapture memory leak is fixed
  • Inline DataTemplate memory leak fixed.

Developers go get the tools:

]]> http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/feed/ 0 Elegant Code » Silverlight http://elegantcode.com Tue, 15 May 2012 10:00:00 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Buy Retin-A Without Prescription http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-part-1setting-up-the-prism-application http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/#comments Wed, 25 Apr 2012 20:03:18 +0000 Brian Lagunas http://elegantcode.com/?p=5158

Buy Retin-A Without Prescription, This is the first video in a series that will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  This video covers how to setup a multi-platform Prism application that targets WPF and Silverlight.  I show you how to setup your directory structure, as well as the solution/project structure inside Visual Studio.  We also create a functional Silverlight and WPF shell application and see our first glimpse of code sharing with the bootstrapper.

Watch the video on Xaml TV.

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]]> http://elegantcode.com/2012/04/25/building-ig-outlook-part-1setting-up-the-prism-application/feed/ 0 Amoxicillin For Sale http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/?utm_source=rss&utm_medium=rss&utm_campaign=building-ig-outlook-introduction-to-a-prism-app http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/#comments Tue, 24 Apr 2012 01:41:57 +0000 Brian Lagunas http://elegantcode.com/?p=5156

Amoxicillin For Sale, Often when learning a technology you start by searching the web.  You look for videos, blogs, articles, samples, and examples.  What you start to realize is that everything you find is very simple “demo” code.  That’s code that shows how to implement a simple feature in a non-realistic demo.  Then you start looking for “production” code examples.  That’s code that represents a more realistic implementation of an application in a production environment.  This type of resource is very difficult to find.  Why?  Mainly, because it is very time consuming to create such examples.

This scenario is no different when trying to learn Prism.  You probably first start by reading though the documentation.  Next, you head on over to Pluralsight and watch my Introduction to Prism course.  Now that you know all the basics you start searching the web for examples for specific scenarios.  How do I do “x” and “y”?  How do I apply this sample code to my application?  Hopefully I can help you answer those questions.

I am starting a new video series called Building IG Outlook.  I will take you step-by-step on building a Prism application that mimics Microsoft Outlook.  We will be discussing the following key areas in no specific order:

  1. Application architecture/structure
  2. Multi-platform support (WPF and Silverlight)
  3. Commanding
  4. Event aggregation
  5. Custom RegionAdapters
  6. Custom RegionBehaviors
  7. Navigation (OutlookBar, Ribbon, and View interaction)
  8. MVVM (no frameworks needed)

Like most production applications we will have a dependency on a 3rd party toolset.  I will be using Infragistics NetAdvantage for WPF and Silverlight.  If you don’t own Infragistics you can download the trial or purchase the suite so you can compile and run all the sample code.  Otherwise, you will have to modify the code to work with your vendor of choice.

I hope this series will help you gain a better understanding of how you can use the various aspects of Prism to build your applications.  This will be a long series and I plan to record at least one a week depending on my traveling schedule.  If you have any questions or would like to see something specific be sure to let me know, and I will see if I can squeeze an example in the application.

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]]> http://elegantcode.com/2012/04/23/building-ig-outlook-introduction-to-a-prism-app/feed/ 0 Buy Flagyl Without Prescription http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/?utm_source=rss&utm_medium=rss&utm_campaign=create-a-custom-prism-regionadapter http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/#comments Wed, 18 Apr 2012 19:26:48 +0000 Brian Lagunas http://elegantcode.com/?p=5148

Don’t want to read the article?  Watch the video tutorial on Xaml TV.

Prism provides 4 region adapters out of the box for you:

  • ContentControlRegionAdapter
  • SelectorRegionAdaptor
  • ItemsControlRegionAdapter
  • TabControlRegionAdapter (Silverlight only)

Buy Flagyl Without Prescription, Well, what happens when you want to use a different control as a region host?  Simple.  You need to write a custom region adapter for it.  Is it hard you ask?  No it is quite easy.  Let’s write one for the StackPanel.

Start by creating a class the derive from and implements the base abstract class RegionAdapterBase<T>.

public class StackPanelRegionAdapter : RegionAdapterBase<StackPanel>
{
    public StackPanelRegionAdapter(IRegionBehaviorFactory factory)
        : base(factory)
    {

    }

    protected override void Adapt(IRegion region, StackPanel regionTarget)
    {
        region.Views.CollectionChanged += (s, e) =>
            {
                if (e.Action == NotifyCollectionChangedAction.Add)
                {
                    foreach (FrameworkElement element in e.NewItems)
                    {
                        regionTarget.Children.Add(element);
                    }
                }

                //implement remove
            };
    }

    protected override IRegion CreateRegion()
    {
        return new AllActiveRegion();
    }
}

Notice that there are two methods we need to implement. Adapt and CreateRegion.  CreateRegion return the type of region we will need.  In our case we want to support multiple views so we need to return an instance of an AllActiveRegion.  If we only needed support for one view at a time we would return a SingleActiveRegion.  The Adapt method is responsible for adapting the region to our control.  This is where we will add and remove the views to or host control.

Now we simply have to tell Prism about our new RegionAdapter.  We do this in the bootstrapper.  Simply override the ConfigureRegionAdapterMappings method as follows:

protected override Microsoft.Practices.Prism.Regions.RegionAdapterMappings ConfigureRegionAdapterMappings()
{
    RegionAdapterMappings mappings = base.ConfigureRegionAdapterMappings();
    mappings.RegisterMapping(typeof(StackPanel), Flagyl dose, Buy generic Flagyl, Container.Resolve<StackPanelRegionAdapter>());
    return mappings;
}

That’s it.  Now you can use a StackPanel as a region host:

<StackPanel Orientation="Horizontal"
            prism:RegionManager.RegionName="MyRegion" />

 

Download the sample application.

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]]> http://elegantcode.com/2012/04/18/create-a-custom-prism-regionadapter/feed/ 1 Retin-A For Sale http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/?utm_source=rss&utm_medium=rss&utm_campaign=validate-a-property-against-a-parent-collection http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/#comments Thu, 12 Apr 2012 00:34:53 +0000 Brian Lagunas http://elegantcode.com/?p=5076

Retin-A For Sale, I was monitoring my Twitter feed, like I always do, and saw a tweet come through asking about how to validate an object’s property against it’s parent ObservableCollection in the Infragistics XamDataGrid.  What this person was trying to accomplish was to validate a duplicate item in his data source.  They have a POCO object the implements the IDataErrorInfo interface, and an ObservableColletion<POCO> as the data source.  They want to check the ObservableCollection<POCO> for a pre-existing item whenever a property value in a POCO changes.  Obviously this is not a XamDataGrid issue, but rather an object design issue.  So I decided to whip up a quick and dirty solution to solve this particular issue.

The approach I am going to take is to simply keep track of the parent collection from within the POCO object itself.  I really like interfaces, so I started out by defining a simple interface my POCOs will implement.

public interface IHasParent
{
    object Parent { get; set; }
}

Now let’s take a look at the simple POCO I will be using in this example.

public class Person : INotifyPropertyChanged, IDataErrorInfo
{
    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice that we implement both the INotifyPropertyChanged interfaces as well as the IDataErrorInfo interface.  The Next thing we need is a custom ObservableCollection to use as our data source.

public class HasParentObservableCollection<T> : ObservableCollection<T>
{
    protected override void InsertItem(int index, T item)
    {
        //set the parent object when a new item is added to our collection
        if (item != null && item is IHasParent)
            (item as IHasParent).Parent = this;

        base.InsertItem(index, item);
    }
}

Notice that we are casting our item as the IHasParent interface and setting the Parent property accordingly.  The next thing we need to do is have our POCO class implement the IHasPerson interface.

public class Person : INotifyPropertyChanged, IDataErrorInfo, IHasParent
{
    public object Parent { get; set; }

    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            OnPropertyChanged("FirstName");
        }
    }

    private string _lastName;
    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            OnPropertyChanged("LastName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }

    public string this[string columnName]
    {
        get
        {
            if (columnName == "FirstName")
            {
                if (String.IsNullOrWhiteSpace(FirstName))
                    return "First name cannot be empty";
            }

            if (columnName == "LastName")
            {
                if (String.IsNullOrWhiteSpace(LastName))
                    return "Last name cannot be empty";

                if (Parent != null && Parent is IList<Person>)
                {
                    var list = (IList<Person>) Parent;
                    if (list.Count(x => x.LastName == LastName) > 1)
                        return "This last name already exists.  Please use a different last name.";
                }
            }

            return String.Empty;
        }
    }

    public string Error
    {
        get { return String.Empty; }
    }
}

Notice how we implemented the check for a duplicate last name.  We simply checked to make sure we are dealing with the LastName property.  Then we cast the Parent as an IList<Person> so that we can perform a simply LINQ query against it.  We check the parent collection for any results that match the LastName property.  If more than one is returned we have a duplicate.

So let’s test this baby using the XamDataGrid as the original poster was attempting to do.  First create our UI.

<igDP:XamDataGrid Name="xamDataGrid1">
    <igDP:XamDataGrid.FieldLayouts>
        <igDP:FieldLayout>
            <igDP:Field Name="FirstName" Label="First Name" />
            <igDP:Field Name="LastName" Label="Last Name" />
        </igDP:FieldLayout>
    </igDP:XamDataGrid.FieldLayouts>
    <igDP:XamDataGrid.FieldLayoutSettings>
        <igDP:FieldLayoutSettings AddNewRecordLocation="OnTop"
                                  AllowAddNew="True"
                                  AutoGenerateFields="False"
                                  SupportDataErrorInfo="RecordsAndCells"
                                  DataErrorDisplayMode="Highlight" />
    </igDP:XamDataGrid.FieldLayoutSettings>
</igDP:XamDataGrid>

Next let’s hook up some data to this bad boy:

public MainWindow()
{
    InitializeComponent();

    var people = new HasParentObservableCollection<Person>();
    people.Add(new Person(){ FirstName = "Brian", LastName = "Lagunas"});
    xamDataGrid1.DataSource = people;
}

Now let’s run the app, type a duplicate last name, and see what we get.

collection_validated

Cool. Works as expected.  Now there are a number of ways to accomplish this task.  There are even frameworks out there that have already solved this problem for you such as CSLA.  I hope this simple approach helps you find a solution that works for you.

Download the Source.

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]]> http://elegantcode.com/2012/04/11/validate-a-property-against-a-parent-collection/feed/ 2 Human Growth Hormone For Sale http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/?utm_source=rss&utm_medium=rss&utm_campaign=victor-gaudiosopreserving-his-contributions http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/#comments Fri, 06 Apr 2012 19:55:39 +0000 Brian Lagunas http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/

It was Sunday night.  Victor and I were having a video call on Skype finalizing our plans to host his 70+ Silverlight video tutorials on Xaml TV Human Growth Hormone For Sale, .  He was late to our meeting because he said he didn’t feel well.  He said that he was recovering from a week long illness, but he quickly assured me he was feeling better.  We chatted for awhile and then ended the meeting with some friendly banter like we always have in the past.

Sadly the next day, on the morning of Monday April 2, 2012, Victor Gaudioso passed away.  You didn’t have to know Victor long to know that he was passionate about his work and about his community.  He always went the extra mile to help his fellow developer.  I can write pages about all the good things he has done for his family, friends, and community, but instead I would like encourage you to share your memories of Victor.  Think of how he has influenced you in your life.

The Sunday before he passed, Victor gave me 73 of his videos that we would be posting on Xaml TV.  That night he posted 10 of his Microsoft Starter Kit videos.  Unfortunately he passed before he could finish his effort.  With the blessing of his family and the help of his community, we will be posting all 73 of Victor Gaudioso’s Silverlight video tutorials on Xaml TV.  We will preserve his work and contributions that he made to the community.  They will live on and not disappear with an expiring domain or hosting plan.  His legacy will continue to grow as you remember the fond memories you have of him.

If you would like to help by donating to Victor’s memorial fund or to volunteer, please visit the Los Angeles Silverlight User Group site.

Rest in peace my friend.

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]]> http://elegantcode.com/2012/04/06/victor-gaudiosopreserving-his-contributions/feed/ 0 Spiriva For Sale http://elegantcode.com/2012/03/27/introducing-xaml-tv/?utm_source=rss&utm_medium=rss&utm_campaign=introducing-xaml-tv http://elegantcode.com/2012/03/27/introducing-xaml-tv/#comments Tue, 27 Mar 2012 21:46:51 +0000 Brian Lagunas http://elegantcode.com/2012/03/27/introducing-xaml-tv/

I would like announce the creation of a new developer webcast that focuses on Xaml application development called Xaml TV Spiriva For Sale, .  The purpose of Xaml TV is to provide quality Xaml content through interviews with individuals, community leaders, and technology experts in the fields of WPF, Silverlight, Windows Phone, and WinRT/Metro.  If it is Xaml we will cover it.

Currently, Xaml TV is still in the planning phase, heck we don’t even have a logo, and is targeting mid April 2012 to start recording content.  If you would like to submit a talk please feel free to contact me using the contact form.  This content is for the community by the community.  Anyone is welcome to participate.  If you have a topic you want to discuss, just submit your session and we will get you scheduled.

Please help spread the word and make this a valuable resource for our Xaml community.

Follow us on Twitter: @XamlTV and/or @BrianLagunas

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]]> http://elegantcode.com/2012/03/27/introducing-xaml-tv/feed/ 0 Buy Spiriva Without Prescription http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/?utm_source=rss&utm_medium=rss&utm_campaign=creating-a-silverlight-5-static-markup-extension http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/#comments Fri, 23 Mar 2012 19:28:28 +0000 Brian Lagunas http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/

If you have done any WPF application development I am sure you have used and fallen in love with the Static Buy Spiriva Without Prescription, markup extension.  If you’re are not familiar with it, the Static markup extension allows you to reference static fields and properties in your XAML markup.

For example; let’s assume we have a class with the following static field defined:

public class Common
{
    public static string StaticText = "This is text from a static property";
}

We can use this field in our WPF application as follows:

<Grid>
    <TextBlock Text="{x:Static ext:Common.StaticText}" />
</Grid>

image

NOTE: “ext” is a namespace that has been defined to instruct the XAML parser where to find our static field.

Pretty cool right?  Unfortunately if you are also doing any Silverlight development you will soon find that this wonderful and useful extension does NOT exist in Silverlight.  Luckily for us in Silverlight 5 we were given the ability to write our own custom markup extensions.  This can be done using either the IMarkupExtension or the abstract MarkupExtension class.

Now it’s time to create our own Static markup extension.  I want to point out that there is a naming convention when creating custom markup extensions.  The convention is as follows; ExtensionNameExtension.  The name of the extension is followed by Extension.  This is very similar to how you create attributes.  You won’t actually be using the suffix when define them in XAML. 

Let’s start by creating a new class called StaticExtension.  The StaticExtension class should derive from the MarkupExtension abstract class.  You will need to implement the abstract ProvideValue method.  The code I used for the Static markup extension is as follows.

/// <summary>
///  Class for Xaml markup extension for static field and property references.
/// </summary>
public class StaticExtension : MarkupExtension
{
    /// <summary>
    ///  The static field or property represented by a string.  This string is
    ///  of the format Prefix:ClassName.FieldOrPropertyName.  The Prefix is
    ///  optional, and refers to the XML prefix in a Xaml file.
    /// </summary>
    private string _member;
    public string Member
    {
        get { return _member; }
        set
        {
            if (value == null)
            {
                throw new ArgumentNullException("Member");
            }
            _member = value;
        }
    }

    /// <summary>
    ///  Return an object that should be set on the targetObject's targetProperty
    ///  for this markup extension.  For a StaticExtension this is a static field
    ///  or property value.
    /// </summary>
    /// <param name="serviceProvider">Object that can provide services for the markup extension.
    /// <returns>
    ///  The object to set on this property.
    /// </returns>
    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (_member == null)
            throw new InvalidOperationException("member cannot be null");

        // Validate the _member
        int dotIndex = _member.IndexOf('.');
        if (dotIndex < 0)
            throw new ArgumentException("dotIndex");

        // Pull out the type substring (this will include any XML prefix, e.g. "av:Button")
        string typeString = _member.Substring(0, Spiriva street price, Buy cheap Spiriva no rx, dotIndex);
        if (typeString == string.Empty)
            throw new ArgumentException("typeString");

        // Get the IXamlTypeResolver from the service provider
        IXamlTypeResolver xamlTypeResolver = serviceProvider.GetService(typeof(IXamlTypeResolver)) as IXamlTypeResolver;
        if (xamlTypeResolver == null)
            throw new ArgumentException("xamlTypeResolver");

        // Use the type resolver to get a Type instance
        Type type = xamlTypeResolver.Resolve(typeString);

        // Get the member name substring
        string fieldString = _member.Substring(dotIndex + 1, _member.Length - dotIndex - 1);
        if (fieldString == string.Empty)
            throw new ArgumentException("fieldString");

        // Use the built-in parser for enum types
        if (type.IsEnum)
        {
            return Enum.Parse(type, japan, craiglist, ebay, overseas, paypal, Order Spiriva from United States pharmacy, fieldString, true);
        }

        // For other types, Spiriva photos, After Spiriva, reflect
        bool found = false;
        object value = null;

        object fieldOrProp = type.GetField(fieldString, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
        if (fieldOrProp == null)
        {
            fieldOrProp = type.GetProperty(fieldString, Spiriva mg, Spiriva price, BindingFlags.Public |
                                                        BindingFlags.FlattenHierarchy | BindingFlags.Static);
            if (fieldOrProp is PropertyInfo)
            {
                value = ((PropertyInfo)fieldOrProp).GetValue(null, null);
                found = true;
            }
        }
        else if (fieldOrProp is FieldInfo)
        {
            value = ((FieldInfo)fieldOrProp).GetValue(null);
            found = true;
        }

        if (found)
            return value;
        else
            throw new ArgumentException("not found");
    }
}

Now all I need to do is add a namespace to my Silverlight view and then use it in XAML as follows:

<Grid x:Name="LayoutRoot" Background="White">
    <TextBlock Text="{ext:Static Member=ext:Common.StaticText}" />
</Grid>

image

That’s it!  I will definitely be using this quite often.  I would like to mention that unlike in WPF where you don’t have to specify the “Member” property explicitly, buy Spiriva online no prescription, Spiriva brand name, in Silveright you have to explicitly set the Member property.  This is because there is not a ConstructorArgument attribute in Silverlight.  So until then you will need to have a little extra text in your markup syntax.

Download the source.

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]]> http://elegantcode.com/2012/03/23/creating-a-silverlight-5-static-markup-extension/feed/ 2 Cephalexin For Sale http://elegantcode.com/2011/11/04/free-prism-training/?utm_source=rss&utm_medium=rss&utm_campaign=free-prism-training http://elegantcode.com/2011/11/04/free-prism-training/#comments Sat, 05 Nov 2011 04:23:40 +0000 Brian Lagunas http://elegantcode.com/2011/11/04/free-prism-training/

I am excited to announce that Pluralsight and Microsoft’s Patterns & Practices Cephalexin For Sale, team have joined forces to provide you with free access to over 4 hours of online Prism training.  That’s right, you heard me correctly. FREE online Prism training sponsored by the one and only Patterns & Practices team.  I know you have some question so let me answer the most common:

Q & A

Q1, after Cephalexin. Cephalexin price, When is this free training available?
A1. The entire weekend of Nov 12th 2011 through Nov 14th 2011.

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A2. This training will be freely available to everyone, Cephalexin For Sale. You do not have to be a subscriber.

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A3. Well let’s take a look:

  • Getting started with Prism
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More course information.

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If you are a subscriber and have already watched the course, Cephalexin trusted pharmacy reviews, Cephalexin description, I would like to bring to your attention that there have been two new modules added.  These modules will cover everything you need to know in order to start using the navigation services provided by Prism.  This includes state-based navigation and view-based navigation.

Mark your calendar for Nov 12th and be sure to cram as much Prism knowledge into your brain as you can before the weekend ends.  Don’t worry, if you run out of time you can always ask me questions directly.  You can contact me either through Twitter (@brianlagunas) or through the Extended WPF Toolkit project site.  I hope you enjoy the training.

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]]> http://elegantcode.com/2011/11/04/free-prism-training/feed/ 6 Silverlight 4 Service Release 4.0.50826.0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/?utm_source=rss&utm_medium=rss&utm_campaign=silverlight-4-service-release-4-0-50826-0 http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/#comments Thu, 02 Sep 2010 15:07:03 +0000 Brian Lagunas http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/ In case you haven’t heard yet, Microsoft released a new update for Silverlight 4 yesterday, along with a new SDK.  You can check out the details at KB2164913.

The stuff I was interested in:

  • Add New Row for the DataGrid
  • Improved application startup performance
  • Mouse wheel support for out-of-browser  applications on the Mac
  • Media bug fixes
  • MouseCapture memory leak is fixed
  • Inline DataTemplate memory leak fixed.

Developers go get the tools:

]]> http://elegantcode.com/2010/09/02/silverlight-4-service-release-4-0-50826-0/feed/ 0 geekSpeak: Local Messaging and Silverlight on Channel9 http://elegantcode.com/2010/07/17/geekspeak-local-messaging-and-silverlight-on-channel9/?utm_source=rss&utm_medium=rss&utm_campaign=geekspeak-local-messaging-and-silverlight-on-channel9 http://elegantcode.com/2010/07/17/geekspeak-local-messaging-and-silverlight-on-channel9/#comments Sun, 18 Jul 2010 00:31:58 +0000 Brian Lagunas http://elegantcode.com/2010/07/17/geekspeak-local-messaging-and-silverlight-on-channel9/ For those of you who did not get to see the “Local Messaging and Silverlight” geekSpeak webcast live, it has been posted on Channel9 for your viewing pleasure.

http://channel9.msdn.com/shows/geekSpeak/geekSpeak-Recording-Local-Messaging-and-Silverlight-with-Brian-Lagunas/

And yes, I did give Elegant Code some love on the show.

]]> http://elegantcode.com/2010/07/17/geekspeak-local-messaging-and-silverlight-on-channel9/feed/ 0