private void btnContinue_Click(object sender, System.EventArgs e)
        {
            //Download File
            FileInfo file = null;
            string filename = null;
            filename = Server.MapPath("temp\\Customer.xls");
            file = new FileInfo(filename);
            Response.Clear();
            Response.AddHeader("Content-Disposition","attachment; filename=" + "GIRO.doc");
            Response.AddHeader("Content-Length", file.Length.ToString());
            Response.ContentType = "application/xls";
            Response.WriteFile(filename);
            Response.End();
        }