Query String

Query String is used for transfer the vaule from one page to another page.

take 2 pages...
in page 1
take 1 button , 1 textbox & in the click event write the code

        Response.Redirect("Default2.aspx?user=" + TextBox1.Text + "");

in page 2
take 1 label control.
write the code in page load event

       Label1.Text = Request.QueryString["user"].ToString();

by this we can use the value of one page into another page
the main drawback of this is that it can transfer the value between 2 pages only...
to overcome this drawback we use "SESSION HANDLING".