I have a button which should be enable only if at least a node is selected.
I’ve binding button’s IsEnabled property on SelectedNode (via converter).
All is ok, even in multiselection if no link are selected.
Some trouble appears when I also select link (for example by drag/drop selection) SelectNode is null.
Binding on SelectedPArts is not possible because it is a collection.
Is there exist a more direct way, than suscribing to SelectedPArts.Collectionchange for maintain a boolean bOneNodeIsSelected. ?