private void OkButton_Click(object sender, RoutedEventArgs e)
        {
            if (_viewModel != null)
            {
                _viewModel.SelectedSubDetailRow.TblPurchaseOrderHeaderRequest = _viewModel.SelectedMainRow.Iserial;
                _viewModel.ReceivePurchase(CmbQty.SelectedIndex == 1);
            }

            if (_viewModel2 != null)
            {
                _viewModel2.SelectedSubDetailRow.TblSalesOrderHeaderRequest = _viewModel2.SelectedMainRow.Iserial;
                _viewModel2.ReceivePurchase(CmbQty.SelectedIndex == 1);
            }

            DialogResult = false;
        }