Thank you for contacting us.
I believe the answer to both of your questions is provided by RadListView's client-side component's
method. Please, go through the following online example that is identical in principle to your own scenario:
Do let us know if you need further assistance.
All the best,
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed