HI
Try this sample..
<%@ Page Language="C#" EnableEventValidation="false" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs"
Inherits="POC.WebForm2" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="up" runat="server">
<ContentTemplate>
<asp:DataList ID="dl" runat="server">
<ItemTemplate>
<asp:ImageButton ImageUrl="box.jpg" OnClick="btn_Click" runat="server" />
</ItemTemplate>
</asp:DataList>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
code behind:
protected void btn_Click(object sender, ImageClickEventArgs e)
{
Response.Redirect("ProductDetails.aspx");
}