/// <summary>
        /// Xử lý sự kiện thêm
        /// </summary>
        private void Them()
        {
            Window          window = new Window();
            ucHeThongTKTHCT uc     = new ucHeThongTKTHCT();

            uc.TthaiNvu = "";
            window.WindowStartupLocation = WindowStartupLocation.CenterScreen;
            window.Title = DatabaseConstant.layNgonNguTieuDeForm(DatabaseConstant.Function.KT_HE_THONG_TKTH);

            window.Content = uc;
            window.ShowDialog();
            TimKiem();
        }
        /// <summary>
        /// Xử lý sự kiện sửa
        /// </summary>
        private void Xem()
        {
            HT_TKTH_CTIET dr = (HT_TKTH_CTIET)raddgrDanhSachTK.SelectedItem;

            if (dr == null)
            {
                LMessage.ShowMessage("M.DungChung.ChuaChonBanGhi", LMessage.MessageBoxType.Warning);
            }
            else
            {
                Window          window = new Window();
                ucHeThongTKTHCT uc     = new ucHeThongTKTHCT(dr.ID, DatabaseConstant.Action.XEM);
                window.WindowStartupLocation = WindowStartupLocation.CenterScreen;
                window.Title   = DatabaseConstant.layNgonNguTieuDeForm(DatabaseConstant.Function.KT_HE_THONG_TKTH);
                window.Content = uc;
                window.ShowDialog();
                TimKiem();
            }
        }