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Editorial Team
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Asked: 2026-05-22T00:50:14+00:00

my coding is if (Request.QueryString[uid].ToString() != 0) { string dummy =Request.QueryString[uid].ToString(); Label1.Text = dummy;

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my coding is 

if (Request.QueryString["uid"].ToString() != "0")
{
   string dummy  =Request.QueryString["uid"].ToString();
   Label1.Text = dummy;
    Response.Redirect("../Profile/Home1.aspx?uid="+ dummy );
}
else
{
    Label1.Text = "none";
    Session["AccountId"] = 0;
}

my problem is am using in this coding in home page.. if it is the first page in website querystring creates problem.. if the user starts with login page means it works. now i want to avoid the querystring problem.

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1 Answer

  1. Editorial Team

    you have to fix your if condition to check for null – otherwise you will get an Exception when trying to call ToString() on null:

    if(Request.QueryString["uid"] != null &&  Request.QueryString["uid"].ToString() != "0")

    But there is a better way to do this – QueryString already returns a string:

    if(Request.QueryString["uid"] != null && Request.QueryString["uid"] != "0")
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