public void SelectByIdNguoiDung()
{
DonHangDAL selectDonHangByIdNguoiDung = new DonHangDAL();
selectDonHangByIdNguoiDung._nguoiDung = this._nguoiDung;
KetQua = selectDonHangByIdNguoiDung.SelectByIdNguoiDung();
}