private void DgProducts_SelectionChanged(object sender, SelectionChangedEventArgs e) { lbPictures.ItemsSource = null; if (dgProducts.SelectedItem as Product != null) { Product p = dgProducts.SelectedItem as Product; editProductForm(p); p.Pictures = DbProduct.GetPictures(p); lbPictures.ItemsSource = p.Pictures; bAddImage.IsEnabled = true; } else { resetProductForm(); bAddImage.IsEnabled = false; } lbPictures.Items.Refresh(); }