Ediatble Textbox in asp.net

ASPX Page

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajax" %>

<title>Ajax AutoCompleteExtender without Webservicetitle>

head>

<body>

<ajax:ToolkitScriptManager ID="ScriptManager1" runat="server"/>

<div>

<asp:TextBox ID="txtCountry" runat="server">asp:TextBox>

<ajax:AutoCompleteExtender ID="AutoCompleteExtender1" runat="server" TargetControlID="txtCountry"

MinimumPrefixLength="1" EnableCaching="true" CompletionSetCount="1" CompletionInterval="1000"ServiceMethod="GetCountries" >

ajax:AutoCompleteExtender>

div>

form>

body>

html>

Aspx.cs

Codding

using System.Data;

using System.Data.SqlClient;

using System.Collections.Generic;

using System.Configuration;

[System.Web.Script.Services.ScriptMethod()]

[System.Web.Services.WebMethod]

public static List<string> GetCountries(string prefixText)

{

SqlConnection con = newSqlConnection(ConfigurationManager.ConnectionStrings["dbconnection"].ToString());

con.Open();

SqlCommand cmd = new SqlCommand("select * from Country where CountryName like @Name+'%'", con);

cmd.Parameters.AddWithValue("@Name", prefixText);

SqlDataAdapter da = new SqlDataAdapter(cmd);

DataTable dt = new DataTable();

da.Fill(dt);

List<string> CountryNames = new List<string>();

for (int i = 0; i < dt.Rows.Count; i++)

{

CountryNames.Add(dt.Rows[i][1].ToString());

}

return CountryNames;

}