<%@ Page Language="C#"
AutoEventWireup="true"
CodeFile="TestwebPage.aspx.cs"
Inherits="TestwebPage"
%>
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 runat="server">
    <title>Untitled
Pagetitle>
    <script type="text/javascript">
    function
Filter(Obj)
     {
        var
grid=document.getElementById('GridView1');
        var
terms = Obj.value;
        var
cellNr = "0";//grid colunm cellindex in which you want to search
        var
ele;
        for (var r = 1; r < grid.rows.length; r++) 
        {
          ele =
grid.rows[r].cells[cellNr].innerHTML.replace(/<[^>]+>/g, "");
          if
(ele.toLowerCase().indexOf(terms) >= 0)
                grid.rows[r].style.display = '';
          else
grid.rows[r].style.display = 'none';
        }
    };
    script>
head>
<body>
    <form id="form1" runat="server"> 
    <div>
        <input type="text" onkeyup="Filter(this);" />
        <asp:GridView ID="GridView1" runat="server">
        asp:GridView>        
    div>
    form>
body>
html>
public partial class TestwebPage : System.Web.UI.Page
{
    protected void Page_Load(object
sender, EventArgs e)
    {     
        clsDashboard
objDB = new clsDashboard();
        DataTable
dt1 = new DataTable();
        string
sqlQryCity = string.Empty;
        sqlQryCity = "select
Main_Node_Name from ea_treeview";
        dt1 = objDB.getdatawithdt(sqlQryCity);
        GridView1.DataSource = dt1;
        GridView1.DataBind();       
    }
}