about querystring in.net

hai,
when i pass the two querystring values one from default.aspx and then anotehr from first.aspx i retrieve these two query string values from the same first.aspx.cs page it accepts only one querystring value.it shows null for another one.
here i attached my codings..

hi,

You can do like as shown below which defines a getter for your str variable
private String Str
    {
        get
        {
            if (Request.QueryString["str"] != null && Convert.ToString( Request.QueryString["str"]) != String.Empty)
            {
                return Convert.ToString(Request.QueryString["str"]);
            }
            else
            {
                return String.Empty;
            }
        }
    }

Check before assigning to it.

in first.aspx.cs

string str1
if(Request.QueryString["str"]!=null)
    str1=Request.QueryString["str"].ToString();

I would prefer to use Convert.ToString() rather than ToString().