C# – Maintaining page scroll position after updatepanel partial postback

asp.netcpostbackscrollupdatepanel

I am a beginner at ASP.NET and I have a problem maintaining the scroll position of the page after a partial postback of an UpdatePanel. I tried setting MaintainScrollPositionOnPostback="true" in <%@ Page Language="C#" ...%> but it didn't do the trick. Please note that I am using (and have to use) FireFox.

Any help would be appreciated. Thank you! Here is my code:

<asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server">
<asp:HiddenField ID="ClassificationHiddenField" runat="server" />
<asp:HiddenField ID="DateHiddenField" runat="server" />
<table>
    <tr>
        <td>
            <asp:Panel ID="GroupTitlePanel" CssClass="titlePanelBold" BorderStyle="Ridge" runat="server"
                Width="400px">
                <table id="MainTable">
                    <tr>
                        <td align="center" class="style3">
                            <asp:Label ID="GroupLabel" runat="server">
                            </asp:Label>
                        </td>
                        <td align="center" class="style4">
                            <asp:Label ID="ReturnLabel" runat="server" Text="Expected Return">
                            </asp:Label>
                        </td>
                    </tr>
                </table>
            </asp:Panel>
            <br />
            <asp:Panel ID="GroupMainPanel" runat="server" Width="400px">
            </asp:Panel>
        </td>
        <td width='100px'>
        </td>
        <td>
        </td>
    </tr>
</table>
<asp:Panel ID="BottomPanel" runat="server" BorderStyle="Ridge">
    <table>
        <tr>
            <td align="center">
                <br />
                <asp:ToolkitScriptManager ID="ToolkitScriptManager1" EnablePartialRendering="true"
                    runat="server">
                </asp:ToolkitScriptManager>
                <asp:CheckBoxList runat="server" ID="GroupCheckBoxList" RepeatColumns="10" RepeatDirection="Horizontal"
                    RepeatLayout="Table" AutoPostBack="true" ClientIDMode="AutoID" OnSelectedIndexChanged="GroupCheckBoxList_SelectedIndexChanged">
                </asp:CheckBoxList>
            </td>
        </tr>
        <tr>
            <td>
                <asp:UpdatePanel ID="GroupUpdatePanel" runat="server" Visible="true" UpdateMode="conditional">
                    <ContentTemplate>
                        <asp:Panel ID="GroupGraphPanel" runat="server" Visible="true">
                        </asp:Panel>
                    </ContentTemplate>
                    <Triggers>
                        <asp:AsyncPostBackTrigger ControlID="GroupCheckBoxList" EventName="SelectedIndexChanged" />
                    </Triggers>
                </asp:UpdatePanel>
            </td>
        </tr>
    </table>
</asp:Panel>

Best Answer

This looks like the answer to your question. As a plus; it appears to work on every browser not just FF.

http://www.c-sharpcorner.com/Blogs/11804/maintain-scroll-position-on-postback-within-updatepanel.aspx

if you are using IE then its very simple just put the code in your page directive. 

<%@ Page Language="C#" AutoEventWireup="true" 
 CodeFile="Default.aspx.cs" Inherits="_Default"
 MaintainScrollPositionOnPostback="true" %>

but it will not work in Firefox for that you have to add one browser file into your website

Right click on solution explorer > Add New Item

Select Browser File and add it to App_Browsers folder.

Add MaintainScrollPositionOnPostback capability to this browser file as written below. 

<browsers>
  <browser refID="Mozilla">
      <capabilities>
        <capability name="supportsMaintainScrollPositionOnPostback" value="true" />       
    </capabilities>   
  </browser>
</browsers>

Some times this also not work,

Then a simple solution just add a blank Update panel after the grid and onpostback just put the focus to that update panel it will work in any browser. in cs postbackevent updatepanel1.Focus();

If any problem just feel free to ask or any modification reply.

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