page not redirecting to new page

use '&' instead of '@'

try it

private void DataGrid1_ItemCommand(object source, DataGridCommandEventArgs e)
        {
            if (e.CommandName == "ORD")
            {
                string strISBN;
                string strTitle;
                string strAuthor;
                strISBN = e.Item.Cells[1].Text;
                strTitle = e.Item.Cells[2].Text;
                strAuthor = e.Item.Cells[3].Text;

                Response.Redirect("order.aspx?ISBN=" + strISBN + "& Title=" + strTitle + "& Author=" + strAuthor);
            }
        }

Are you sure that that page verb is set to get and not to post?


This is another trick, try it if else
// Initialize the WebRequest.
WebRequest myRequest = WebRequest.Create(""order.aspx?ISBN=" + strISBN + "@ Title=" + strTitle + "@ Author=" + strAuthor");

// Return the response. 
WebResponse myResponse = myRequest.GetResponse();

// Code to use the WebResponse goes here.

// Close the response to free resources.

myResponse.Close();