AJAX :: How To Set UserControl As AsyncPostBackTrigger In UpdatePanel

Sep 4, 2012

I have a user control 'UserControl1'.

Which is in update panel of ajax.

Now i want to use trigger in update panel.

Then what should i write in eventname of trigger

<Triggers>
<asp:AsyncPostBackTrigger controlid=" UserControl1 " eventname="????" />
</Triggers> 

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