Hi Michael: So you want to update another control upon an event click using an AJAX call.
You will need to handle the event using JavaScript and call the panel update from there. I will check how to do this using Microsoft AJAX framework and I'll post the code here.
If you want to discuss it directly please contact me at daypilot @ annpoint.com.
This example shows how to show selected time range in the UpdatePanel but you can change it to work with any event. Just remember that the handling must be set to PostBack because it's required by ASP.NET AJAX framework.
Let me know if there are any problems with this example.
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