public DonHangModel GetOdersById(string madon)
        {
            var kq = isp.Getbyid(madon);

            kq.TongDonVi  = 0;
            kq.Tonggiatri = 0;
            kq.chitiet    = isp.getctbymadonhang(kq.MaDH);
            for (int i = 0; i < kq.chitiet.Count; i++)
            {
                kq.Tonggiatri += kq.chitiet[i].DonGia * kq.chitiet[i].SoLuong;
                kq.TongDonVi  += kq.chitiet[i].SoLuong;
            }
            if (kq.MaKH != null)
            {
                kq.thongtinkh = isp2.getbyid(kq.MaKH);
            }
            else
            {
                kq.thongtinkh          = new KhachHangModel();
                kq.thongtinkh.tk       = new TaiKhoanModel();
                kq.thongtinkh.HoTen    = kq.TenKH;
                kq.thongtinkh.tk.Email = kq.Email;
            }
            if (kq.MaDiaChi != null)
            {
                kq.diachinhanhang         = isp2.Getdcbyid(kq.MaDiaChi.Value);
                kq.diachinhanhang.tttinh  = isp2.GetTinh(kq.diachinhanhang.Tinh);
                kq.diachinhanhang.tthuyen = isp2.GetHuyen(kq.diachinhanhang.Huyen);
                kq.diachinhanhang.ttxa    = isp2.GetXa(kq.diachinhanhang.Xa);
            }
            else
            {
                kq.diachinhanhang             = new DiaChiModel();
                kq.diachinhanhang.tttinh      = isp2.GetTinh(kq.Tinh.Value);
                kq.diachinhanhang.tthuyen     = isp2.GetHuyen(kq.Huyen.Value);
                kq.diachinhanhang.ttxa        = isp2.GetXa(kq.Xa.Value);
                kq.diachinhanhang.ChiTiet     = kq.DCChitiet;
                kq.diachinhanhang.SoDienThoai = kq.SoDienThoai;
            }

            return(kq);
        }