Jerry,

Just check to see if it's null first before attempting to process it:

  if (Request.QueryString["myKey"] != null)
      lcKey = Request.QueryString["myKey"];

~~Bonnie


>I'm using ASP.Net to create a WebForm.
>
>In my Page_Load(), I want to test for IsPostBack and capture parameters if any. Here's what I do.
>
>

>///Page_Load()
>string lcKey;
>if (Page.IsPostBack)
>{
>  lcKey = Request.QueryString["myKey"];
>}
>

>
>However, if Page.IsPostBack = True and there were not any parameters passed, I get this error:
>
>Object reference not set to an instance of an object.
>
>If I have a Request.QueryString["myKey"];, do I have to pass parameters? Or, how can I test for parameters being passed?
>
>Thanks,
>
>Jerry