update panel post back trigger

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hi!
i ma using update panel with asynchronous post back trigger but the page which is having his code doesnot work properly..i have scroll bar in this page..n when ever i scroll down it automatically scrolls up...how could i resolve this problem

XML

<asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
                                                   <ContentTemplate>
                                                       <div id="ChatContent" runat="server" style="height: 355px; vertical-align: top; overflow-y: auto;
                                                           text-align: left; margin-left: 10px; width: 97%;">
                                                       </div>
                                                   </ContentTemplate>
                                                   <Triggers>
                                                       <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
                                                   </Triggers>
                                               </asp:UpdatePanel>
                                               <asp:Timer ID="Timer1" runat="server" Interval="1000" OnTick="Timer1_Tick">
                                               </asp:Timer>

Posted 14-May-11 3:14am

hinzhonee

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Sandeep Mewara 14-May-11 11:34am

How is your async trigger related to scroll here? Why you mention it?

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Pareen Vatani · Answer 1 · 2011-05-15T04:33:00

I think this should work for you

Put the following script after the ScriptManager on your page. And since the _endRequest event of the PageRequestManager happens before the page is rendered, you wont see your page move

XML

<script type="text/javascript">
    var xPos, yPos;
    var prm = Sys.WebForms.PageRequestManager.getInstance();
    prm.add_beginRequest(BeginRequestHandler);
    prm.add_endRequest(EndRequestHandler);
    function BeginRequestHandler(sender, args) {
        xPos = $get('scrollDiv').scrollLeft;
        yPos = $get('scrollDiv').scrollTop;
    }
    function EndRequestHandler(sender, args) {
        $get('scrollDiv').scrollLeft = xPos;
        $get('scrollDiv').scrollTop = yPos;
    }
</script>