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checkboxlist full post back problem is association with PopupControlExtender

Posted By:      Posted Date: August 26, 2010    Points: 0   Category :ASP.Net

I have used a checkboxlist in association with PopupControlExtender. All the items are inside the update panel. I used the server side SelectedIndex changed event of checkbox list for another purpose.  But it cause full post back while checking the check box item. The update panel doent make any sense here.

        <asp:ScriptManager ID="Scriptmanager1" runat="server">
        <asp:UpdatePanel ID="UpdatePanel3" runat="server">

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