protected void btnSave_Click(object sender, EventArgs e)
 {
     foreach (Telerik.Web.UI.GridDataItem item in grdResult.MasterTableView.Items)
     {
         HiddenField hdnExamPaperId   = item.FindControl("hdnExamPaperId") as HiddenField;
         HiddenField hdnExamPlaceId   = item.FindControl("hdnExamPlaceId") as HiddenField;
         HiddenField hdnExamDate      = item.FindControl("hdnExamDate") as HiddenField;
         HiddenField hdnExamTime      = item.FindControl("hdnExamTime") as HiddenField;
         TextBox     txtTrackNumber   = item.FindControl("txtTrackNumber") as TextBox;
         Label       lblExamPlaceName = item.FindControl("lblExamPlaceName") as Label;
         if (hdnExamPaperId != null && txtTrackNumber != null && lblExamPlaceName != null && hdnExamPlaceId != null && hdnExamDate != null &&
             hdnExamTime != null)
         {
             var examPaper = !string.IsNullOrEmpty(hdnExamPaperId.Value) ? Convert.ToInt32(hdnExamPaperId.Value) : 0;
             if (eBusiness.AddOrUpdateExamPaper(examPaper, txtTrackNumber.Text, Convert.ToInt32(hdnExamPlaceId.Value)
                                                , hdnExamDate.Value, hdnExamTime.Value))
             {
                 cBusiness.InsertIntoUserLog(int.Parse(Session[sessionNames.userID_Karbar].ToString()), DateTime.Now.ToShortTimeString(),
                                             int.Parse(Session[sessionNames.appID_Karbar].ToString()), 169, "ثبت کد مرسوله شهر " + lblExamPlaceName.Text,
                                             examPaper);
                 lblSuccessMessage.Text = "تغییرات با موفقیت ذخیره شد.";
             }
         }
     }
     pnlSuccessMessageBox.Visible = true;
 }