protected void ItemChkboxActiveuser_CheckedChanged(object sender, EventArgs e)
        {
            ((sender as CheckBox).NamingContainer as GridItem).Selected = (sender as CheckBox).Checked;
            bool checkHeader = true;

            foreach (GridDataItem dataItem in RgvCampusMaster.MasterTableView.Items)
            {
                if ((dataItem.FindControl("ItemChkboxActiveuser") as CheckBox).ClientID == (sender as CheckBox).ClientID)
                {
                    string lbCampusID = Convert.ToString((dataItem.Cells[0].FindControl("lbCampusID") as Label).Text);
                    string strchk     = "";
                    if ((sender as CheckBox).Checked == true)
                    {
                        strchk = "true";
                    }
                    else
                    {
                        strchk = "false";
                    }
                    DataAccessManager.ActiveDeactiveCampusMaster(lbCampusID, strchk);
                    RLChkconstr.Text = string.Empty;
                }
            }
        }