DataGrid edition 'EditItem' is not allowed for this view` when bound to a WPF DataGrid

Question

I\'ve been reading about this at least for 4 hours, and seems to be the list type, but I have a situation:

A ObservableCollection that has a collection property.

Answer 1

I tried this and the problem is that you have initialized your Level2 collection as Hashset<>. IEditableCollectionView.EditItem() throws this error while trying to update item in Hashset<>. I initialized the collection as List<> and it was working fine.

I am not sure why it is not able to update item in hashset, need to look deeper into it. But changing the Hashset<> to List<> will fix this error.

Hope it helps

Thanks