private void grvCTBanTest_SelectionChanged(object sender, EventArgs e)
        {
            int rowSelected = grvCTBanTest.CurrentRow.Index;

            try
            {
                using (var k = new AppCode.QuanCafe())
                {
                    var kq = k.TimDoUong(k.TimDSCTHD(AppCode.STHoaDon.idHoaDon)[rowSelected].IDDoUong);
                    AppCode.STDoUong.id      = kq.IDDoUong;
                    AppCode.STDoUong.soLuong = int.Parse(grvCTBanTest.Rows[rowSelected].Cells[2].Value.ToString());
                    AppCode.STDoUong.giaban  = int.Parse(grvCTBanTest.Rows[rowSelected].Cells[3].Value.ToString());
                    AppCode.STDoUong.giagoc  = kq.GiaGoc;
                    AppCode.STDoUong.loai    = kq.IDLoai;
                    AppCode.STDoUong.ten     = kq.TenDoUong;
                }
            }
            catch
            {
                return;
            }
        }