Collection is read-only Error

Emma Krystal · August 15th, 2011, 01:38 AM

Hi,
I am getting this error -:
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NotSupportedException: Collection is read-only.

Source Code
protected void Repeater1_ItemCommand(object source, RepeaterCommandEventArgs e)
{
if (e.CommandName == "Report")
{

string question = e.CommandArgument.ToString();
Request.QueryString["roll"] = question; //here I am getting error
Response.Redirect("~/Report/CrystalReport.aspx");
}
}

Please do lemme know the solution for it...

Thanks
Emma

Imar · August 15th, 2011, 05:12 AM

Hi Emma,

As the error message suggestd, the QueryString collection is read-only. You can read values from it, but not assign to it. Instead, you need to pass your values through the query string part of the address. For example:

Code:

Response.Redirect("~/Report/CrystalReport.aspx?roll=" + e.CommandArgument.ToString());

Hope this helps,

Imar