During a Drag&Drop in a RadTreeView, I encounter some troubles with TreeViewDragDropOptions where the dropped item is positioned. Ideally I would like to get the objects that are positioned before and after (if they exist) the dropped item.
However, following multiple found example (like this one), in my case, the content of TreeViewDragDropOptions is always null.
Those are the objects I am binding to the TreeView:
Here T is a Category
In the ViewModel, an ObservableCollection contains the hierarchy.
Finally, the Views:
And the code behind:
I have no idea what is wrong or what could be missing.
Thank you very much for your help!