protected void grdBooking_ItemCommand(object source, DataGridCommandEventArgs e)
        {
            try
            {
                string strCa = e.CommandArgument.ToString();
                txtId.Text = e.CommandArgument.ToString();
                if (e.CommandName == "Edit")
                {
                    grdCustomer.DataSource = BookingService.Booking_GetById(strCa);
                    grdCustomer.DataBind();

                    grdShopcard.DataSource = BookingService.Booking_GetById(strCa);
                    grdShopcard.DataBind();

                    pnUpdate.Visible = true;
                    pnView.Visible   = false;
                }
                if (e.CommandName == "Delete")
                {
                    BookingService.Booking_Delete(strCa);
                    BindGrid();
                }
            }
            catch (Exception ex)
            {
                WebMsgBox.Show(ex.Message);
            }
        }
        protected void lbtDeleteB_Click(object sender, EventArgs e)
        {
            try
            {
                DataGridItem item = default(DataGridItem);
                for (int i = 0; i < grdBooking.Items.Count; i++)
                {
                    item = grdBooking.Items[i];
                    if (item.ItemType == ListItemType.AlternatingItem | item.ItemType == ListItemType.Item)
                    {
                        if (((CheckBox)item.FindControl("ChkSelect")).Checked)
                        {
                            string strId = item.Cells[1].Text;
                            var    dt    = new DataTable();
                            BookingService.Booking_Delete(strId);
                        }
                    }
                }

                grdBooking.CurrentPageIndex = 0;
                BindGrid();
            }
            catch (Exception ex)
            {
                WebMsgBox.Show(ex.Message);
            }
        }