ASP.Net

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="NoPostback.Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Label runat="server" ID="outputLabel" ></asp:Label><br />
        <asp:ScriptManager runat="server" ID="sm1"></asp:ScriptManager>
        <asp:Timer runat="server" Interval="5000" ID="RefreshTimer" OnTick="RefreshTimer_Tick"></asp:Timer>
        <asp:UpdatePanel runat="server">
            <Triggers>
                <asp:AsyncPostBackTrigger ControlID="RefreshTimer" EventName="Tick" />
            </Triggers>
            <ContentTemplate>
                <asp:GridView runat="server" ID="testgrid"></asp:GridView>
            </ContentTemplate>
        </asp:UpdatePanel>
    </div>
    </form>
</body>
</html>