IEditableCollectionView to filter out deleted objects - wpf

Question

I'm using my own derived ObservableCollection that implements ICollectionViewFactory to allow me to create my own IEditableCollectionView on top of it. The (main) purpose of the view is to allow filtering out objects flagged as "deleted", so that these records aren't shown to the user but still remains within the collection, as long as they're not marked as "accepted" or rolled back.
Am I on the right track here? Or this isn't the purpose of IEditableCollectionView?
UPDATE: The collection must support adding, removing and editing records.
SECOND UPDATE: The records flagged as "deleted" must still be within the source collection, as a delete operation can be rolled back.

Answer 1

I think what you are after can be achieved much more easily
Say you have a Model
public class Item
{
public bool IsDeleted { get; set; }
public string Name { get; set; }
}
And your ViewModel contains a collection
public ObservableCollection<Item> MyItems { get; set; }
You can add ICollectionView property that will filter your collection by undeleted items. Here is an example:
public ICollectionView UndeletedItems { get; set; }
Filtering logic:
// Collection which will take your ObservableCollection
var itemSourceList = new CollectionViewSource { Source = MyItems };
// ICollectionView the View/UI part
UndeletedItems = itemSourceList.View;
//add the Filter
UndeletedItems.Filter = new Predicate<object>(item => !((Item)item).IsDeleted);
Then bind your View to UndeletedItems instead
<DataGrid ItemsSource="{Binding UndeletedItems}" AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Name}"/>
</DataGrid.Columns>
</DataGrid>
This will hide deleted items while still supporting CRUD operations.
Hope this helps