public void RemoveAwaiting( )
        {
            if (SelectedDonHangTamThoi == null)
            {
                return;
            }

            var dialog = IoC.Get <DialogViewModel>();

            dialog.Question    = "Xóa đơn hàng đã chọn?";
            dialog.DisplayName = "";

            var result = _windowManager.ShowDialog(dialog);

            if (result != true)
            {
                return;
            }

            try
            {
                DonHangTamBUS.XoaDonHangTam(SelectedDonHangTamThoi.MaDonHangTam);
                DonHangTamThoiList.Remove(SelectedDonHangTamThoi);
            }
            catch (Exception e)
            {
                var error = IoC.Get <ErrorViewModel>();
                error.ErrorName   = e.Message;
                error.DisplayName = "Lỗi";
                _windowManager.ShowDialog(error);
            }
        }
        public void RefreshDonHangTamThoi( )
        {
            try
            {
                GetDonHangTamFromServer();
            }
            catch (System.Net.WebException e)
            {
                var error = IoC.Get <ErrorViewModel>();
                error.ErrorName   = "Có vấn đề về mạng";
                error.DisplayName = "Lỗi";
                _windowManager.ShowDialog(error);
            }

            DonHangTamThoiList.Clear(  );
            foreach (var donHang in DonHangTamBUS.SelectDonHangTamAll(  ))
            {
                DonHangTamThoiList.Add(new DonHangTamThoi(donHang));
            }
        }