private void BtnCapNhapSoLuongVoucher_Click(object sender, RoutedEventArgs e) { int maVoucher = Convert.ToInt32((dtgKhuyenMai.SelectedItem as DataRowView).Row[0]); int soLuong = Int32.Parse(txtSoLuong2.Text); BaseDAO.CapNhatSoLuongVoucher(maVoucher, soLuong); ViewUtil.loadView(ViewEnum.ChuongTrinhKhuyenMai); }