One way I can think of is that you use either client-side or server side of the RadTreeView events (Server-Side Events
or Client-Side Events
) and find the user control and then the corresponding control (here
is more information how to achieve this on the server). In case this does not help I would recommend that you open a support ticket and send me a simple runnable page that I can inspect locally and help you out in the particular scenario.
the Telerik team
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