protected void Page_Load(object sender, EventArgs e)
    {
        try
        {
            NetworkCredential NetCredentials = new NetworkCredential();
            NetCredentials.UserName = ConfigurationManager.AppSettings["UserName"];
            NetCredentials.Password = ConfigurationManager.AppSettings["Password"];

            if (Request["OrderNo"].ToString() != "")
            {
                Web_Order_Mail objser = new Web_Order_Mail();
                objser.UseDefaultCredentials = true;
                objser.Credentials           = NetCredentials;
                string str = ConfigurationManager.AppSettings["FilePath"] + objser.OrderConfirmationPrint(Convert.ToString(Request["OrderNo"].ToString()));
                Response.Clear();
                Response.ContentType = "application/pdf";
                Response.WriteFile(str);
                Response.Flush();
            }
        }
        catch (Exception ex)
        {
            var message = new JavaScriptSerializer().Serialize(ex.Message.ToString());
            var script  = string.Format("alert({0});", message);
            ScriptManager.RegisterClientScriptBlock(Page, Page.GetType(), "", script, true);
        }
    }