Drag/Drop doesn't work when TreeListView is in RadLayoutControl

[Non]

Hello,

I've implemented TreeViewDragDropBehavior for TreeListView by using the sample code from Telerik UI for WPF Demo and it's work.

But when I added the TreeListView into a RadControlLayout, drag/drop events seems stop working. TreeViewDragDropBehavior.OnDragInitialize was fired but nothing happed afterward.

Any workaround about this?

Thanks.

[Martin Ivanov]

Hello Non,

The reported behavior appears because RadLayoutControl internally works with DragDropManager and it cancels the drag operation in certain cases. In order to prevent this you can handle the DragInitialize event fired by RadTreeListView. This way the drag/drop opeartion won't bubble to the layout control.

DragDropManager.AddDragInitializeHandler(this.treeListView, OnTreeListViewDragInitialize);

private void OnTreeListViewDragInitialize(object sender, DragInitializeEventArgs e)
{
    e.Handled = true;
}

I hope this helps.

Regards,
Martin Ivanov
Progress Telerik