Parsing Page Parameters in ASP.Net

This will be obvious to most, but I am slow to catch up to the rest
of you. 

Are you tired of writing parameter validation code in your ASP.Net pages? Usually
it looks something like this:

1protected override void OnLoad(EventArgs
e)
2{
3   if(
!this.IsPostBack )
4  
{
5      
projName = this.ParseRequiredParam(“p”);
6       if(
projName == null || projName.Lentgh < 1)
7          throw new ArgumentNullException( “p”, “You
must pass a project name.” );
8  
}
9}

Instead, place this function in your page’s base class:

1protected string ParseRequiredParam( string paramName
) 


2{ 


3  string value
= this.Request.Params[ paramName ]; 


4  if(
value == null || value.Length < 1 ) 


5  { 


6  throw new ArgumentNullException(
paramName, "Parameter is required."); 


7  } 


8 return value; 


9} 

And simply call it from within
your code like this: 

1protected override void OnLoad(EventArgs
e) 


2{ 
3 if(
!this.IsPostBack ) 
4 { 
5 projName
= this.ParseRequiredParam("p"); 
6 } 
7} 
Enjoy.