Maintain GridView Scroll Position and Header Inside Update Panel

Using The Code

I have written the following JavaScript code for handling the partial postback. which handles the Div scroll position during postback of GridView inside the update panel:

<script language="javascript" type="text/javascript">
// This Script is used to maintain Grid Scroll on Partial Postback
var scrollTop;
//Register Begin Request and End Request 
Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(BeginRequestHandler);
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
//Get The Div Scroll Position
Function BeginRequestHandler(sender, args) 
{
var m = document.getElementById('divGrid');
scrollTop=m.scrollTop;
}
//Set The Div Scroll Position
function EndRequestHandler(sender, args)
{
var m = document.getElementById('divGrid');
m.scrollTop = scrollTop;
} 
</script>

Following is the code for GridView. Gridview should be placed inside a Update panel and Div control. Div allow us to scroll the gridview.

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<div id="divGrid" style="overflow: auto; height: 130px"> 
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4"
DataSourceID="SqlDataSource1" ForeColor="#333333" GridLines="None" Width="235px"
OnSelectedIndexChanged="GridView1_SelectedIndexChanged">
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<HeaderStyle CssClass="HeaderFreez" />
<Columns>
<asp:BoundField DataField="Roll" HeaderText="Roll" SortExpression="Roll" />
<asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
<asp:BoundField DataField="Langauge" HeaderText="Language" SortExpression="Langauge" />
<asp:CommandField ShowSelectButton="True" />
</Columns>
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#999999" />
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
</asp:GridView>
</div>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" 
ConnectionString="<%$ ConnectionStrings:DotNetRnDDBConnectionString %>"
SelectCommand="SELECT * FROM [StudDetails]"></asp:SqlDataSource>
</ContentTemplate>
</asp:UpdatePanel>

Here is the CSS code which is used to freeze the Header of GridView. Just add this class as a HeaderStyleclass of Gridview.This will freeze the Grids Header. We can use it in all other cases also where we need to freeze the header.

.HeaderFreez
{
   position:relative ;
   top:expression(this.offsetParent.scrollTop);
   z-index: 10;
}

View More Details http://www.codeproject.com/KB/aspnet/AjaxScroll.aspx