Dot Net Code Snippets

Now , i am going to explain how to check Whether the Querystring is present or available or not.

For ex: I am passing id as a querystring to the page2.aspx from page1.aspx.

So on Page1.aspx


Button1_Clickevent()

Response.Redirect("page2.aspx?id=1",false);

Then on Page2.aspx

Page2_Loadevent()

If(!IsPostback)
{
       If(!String.ISNullOrEmpty(Request.QueryString["id"]))
        {
              // get the value of Querstring id , if id is not null or empty
        }
       else if(!String.ISNullOrEmpty(Request.QueryString["name"]))
        {
             // get the value of name querystring if name is not null or empty
        }

}

 
When you run the above code - ie: on Page2.aspx you can get the id Querystring value. this works fine.   


Suppose if you pass some other querystring name ex: name from the Page1.aspx the above code gives



ie: Button2_Clickevent()




         Response.Redirect("page2.aspx?name=Dotnet",false);

Page2_Loadevent()




If(!IsPostback)
{
  if(Request.QueryString["id"] != null) 
   { 
       If(!String.ISNullOrEmpty(Request.QueryString["id"]))
        {
              // get the value of Querstring id , if id is not null or empty
        }
  } 

if ((Request.QueryString["name"] != null)  
{      
   if(!String.ISNullOrEmpty(Request.QueryString["name"]))
        {
             // get the value of name querystring if name is not null or empty
        }

} 
}