How to .Update() the Update panel from another Form?

Question

I have searched and done all my research but I can't seem to find the answer that I need.

I need my Update panel on Page1.aspx to change/update when I click on the submit button on Page2.aspx...

Any help will be gladly appreciated.

Thanks :)

Answer 1

<asp:Button Text="text" runat="server" OnClientClick="window.opener.__doPostBack('UpdatePanel1', '');" />