updatepanel timer every one second

hi,

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml.Linq;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        XDocument document = XDocument.Load("http://localhost:56466/1000217859.xml");


        var test = from t1 in document.Descendants("path")
                     where t1.Parent.Element("path").Element("name") != null
                   select t1.Parent.Element("path").Element("name");

     //   IEnumerable<XElement> list1 = document.Root.Descendants("events");


        GridView1.DataSource = test;
        GridView1.DataBind();
    }
    protected void Unnamed_Tick(object sender, EventArgs e)
    {
        XDocument document = XDocument.Load("http://localhost:56466/1000217859.xml");


        var test = from t1 in document.Descendants("path")
                   where t1.Parent.Element("path").Element("name") != null
                   select t1.Parent.Element("path").Element("name");

        GridView1.DataSource = test;
        GridView1.DataBind();
    }
}

My code working...

I want to ask you how to use timer every one second.

Before:


after:



I need every one second to show first picture. Marked text.
Thanks.