Problem: I need to completely disable selected state of nodes in RadTreeView.
I attach OnClientNodeClicking and OnClientKeyPressing to RadTreeView.
Please, try this markup. It shows strange behaviour:
Step 1. I expand 'Node 1' by clicking on plus image ([+])
Step 2. Now I press 'Enter' (or 'Up', 'Down') key
... and .. first node is selected! (In spite of the fact that I used OnClientKeyPressing)
If in step 1 I expand 'Node 1' by double clicking on text of node - in step 2 node not selected (normal behaviour)