Partial postback with Javascript

Question

I couldn\'t find something similar in SO.

In ASP.NET, is there any way that on cue I can cause a partial postback with Javascript in an UpdatePanel?
I tried

Answer 1

You can use an AsyncPostBackTrigger with the UpdatePanel to do this. Because you need something that can fire an event, using a button is fairly simple and when hidden works nicely.

If this is your markup:

When you want the panel to be updated, you just need to call:

__doPostBack('<%=ReloadThePanel.ClientID %>', null);

This will make ASP.NET think that ReloadThePanel was clicked and the JavaScript auto-generated due to the trigger will handle the rest.

EDIT

You can do a pure JavaScript update of the UpdatePanel without any triggers or hidden buttons. You just need to invoke __doPostBack with the client-side ID as the first argument.

__doPostBack('<%=UpdatePanel1.ClientID %>', null);