private void LayDonHang()
    {
        DataTable dt = DonHang.LayDanhSachDonHang();

        for (int i = 0; i < dt.Rows.Count; i++)
        {
            int    maTinhTrang = int.Parse(dt.Rows[i]["tinhTrang"].ToString());
            string tinhTrang   = "";
            switch (maTinhTrang)
            {
            case 0:
                tinhTrang = "Chờ xác nhận";
                break;

            case 1:
                tinhTrang = "Đang giao hàng";
                break;

            case 2:
                tinhTrang = "Đã thanh toán";
                break;

            case 3:
                tinhTrang = "Đã hủy";
                break;

            default:
                tinhTrang = "Chờ xác nhận";
                break;
            }

            ltrDonHang.Text += @"
                   <tr id='maDong_" + dt.Rows[i]["maDH"] + @"'>
                        <td class='cotMa'>" + dt.Rows[i]["maDH"] + @"</td>
                       <td class='cotHoTen'>" + dt.Rows[i]["hoTen"] + @"</td>
                       <td class='cotTenDK'>" + dt.Rows[i]["dienThoai"] + @"</td>
                       <td class='cotHoTen'>" + dt.Rows[i]["email"].ToString() + @"</td>
                        <td class='cotDiaChi'>" + dt.Rows[i]["diaChi"].ToString() + @"</td>
                        <td class='cotNgaySinh'>" + dt.Rows[i]["ngayLap"].ToString().Split(' ')[0] + @"</td>
                        <td class='cotHoTen'>" + tinhTrang + @"</td>
                       <td class='cotCongCu'>
                            <a href='Admin.aspx?module=don-dat-hang&thaotac=chi-tiet&id=" + dt.Rows[i]["maDH"] + @"' class='chiTiet' title='Xem chi tiết'></a>
                           <a href='Admin.aspx?module=don-dat-hang&thaotac=chinh-sua&id=" + dt.Rows[i]["maDH"] + @"' class='sua' title='Sửa'></a>
                           <a href=javascript:XoaDonHang('" + dt.Rows[i]["maDH"] + @"') class='xoa' title='Xóa'></a>
                       </td>
                   </tr>
            ";
        }
    }