protected void DelegationScheduleGridView_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            int         Id    = Convert.ToInt32(DelegationScheduleGridView.DataKeys[e.RowIndex].Values[0]);
            GridViewRow row   = DelegationScheduleGridView.Rows[e.RowIndex];
            DateTime?   start = SupplierBizLogic.findStartDate(Id);
            DateTime?   end;

            if (start >= DateTime.Now.Date)
            {
                SupplierBizLogic.DeleteDelegation(Id);
                this.BindGrid();
            }
            else
            {
                end = DateTime.Now.Date.AddDays(-1);
                SupplierBizLogic.UpdateDelegation(Id, end);
            }
        }