wpf controls - WPF ObservableCollection Edit Mode

Question

I am using observable collections all around my applications. My problem is that when i use a popup window for editing those entities, my bound lists are getting changed when the user changes those corresponding fields in the window.

How could i simply freeze the observable changes norifications, and release them only when the entity is saved?

Thanks, Oran

Answer 1

I think the issue is not with the collection, but with the entities themselves. ObservableCollection raises an event when an item is added or removed, not when a property of an item is changed. This part is handled by the INotifyPropertyChanged implemented by the item, so it's this notification you need to disable.

I suggest you have a look at the IEditableObject interface, which is designed for this kind of scenario. You can disable the notifications in the BeginEdit method, and reenable them in EndEdit and CancelEdit.

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EDIT: Paul Stovell has a nice implementation of an IEditableObject wrapper here : http://www.paulstovell.com/editable-object-adapter