AJAX Auto Complete Extender for textbox in Asp.net webForm.(How to Link .Net-WebService to a AJAX Auto complete Extender! )

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C#

ASP.NET

Ajax

Hi everyone
i'm new to web services in asp.net. well basically in my asp.net Solution ,it has 3 basic projects namely (PAL(all the web form interfaces are there) , BAL(refer business logic) and DAL ( refer data access -SQL server part). PAL is linked to BAL and BAL is LINKED to DAL. then i want to add a Ajax auto complete extender to a Textbox in a web form located at PAL .just say testwebform.aspx and i write a webService in a BAL namely webService1 and add a webmethod as follows..

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Data;
using System.Data.Sql;
using AjaxControlToolkit;
using DAL;

namespace BAL
{
    /// <summary>
    /// Summary description for WebService1
    /// </summary>
    [WebService(Namespace = "http://testserver/webservices")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
     [System.Web.Script.Services.ScriptService]
     //[System.Web.Services.WebMethod]
     //[System.Web.Script.Services.ScriptMethod]

    public class WebService1 : System.Web.Services.WebService
    {

        [WebMethod]
        public String[] GetCompanyList(String prefixText, Int32 count)
        {
            String[] strList = null;
            List<string> strCompanyList = new List<string>();

            String Consigneeprefix = prefixText + "%";
            String Sql = "SELECT TOP'"+count+"'[conCode],[conName] FROM [tblConsignee] WHERE [cusCode] ='"+webSupport.ShipperCode().Trim() +"' AND  [conName] LIKE'" + Consigneeprefix +"'";

// webSupport.ShipperCode refer to get the ShipperCode for Sql Query String via.

            DataTable dt = new DataTable();
            dt = SQLTrans.executeQuery(Sql, "tbl");

            if (dt.Rows.Count> 0)
 
            {
                for ( int i = 0 ; i< dt.Rows.Count;i++)
                {
                  // Here is the Douted area in web method.

                  strCompanyList.Add(AjaxControlToolkit.AutoCompleteExtender.
                  CreateAutoCompleteItem(dt.Rows[i][0].ToString(), Convert.ToString(dt.Rows[i][1].ToString())));


                }

                strList = new String[10];
                strList = strCompanyList.ToArray();


            }
            else
            {
                //No records found

            }
            
            return strList;
        }
    }
}

then i called the web service method from PAL's particular webform by using following AJAX auto completeextender as follows. and it says "Server tag is Not well formed". i refer Using AJAX AutoCompleteExtender for autosuggest[^] to get the idea of webServices and AJAX auto Complete extender.But i also dnt know how to Link return SQL query's return two Fields([conCode],[conName]) values. it is conCode to a value flied of the Extender and conNameto Text feild in the Ajax extender.

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">

<asp:TextBox ID="TextBox1" runat="server" Height="19px" Width="256px"></asp:TextBox>
    
            <asp:AutoCompleteExtender ID="txtAutoCompleteforCompany_AutoCompleteExtender"
	            MinimumPrefixLength="1" TargetControlID="TextBox1" 
	            CompletionSetCount="10"CompletionInterval="100" 
	            ServiceMethod="GetCompanyList" 
	            ServicePath="../BAL/WebService1.asmx"
	            runat="server" OnClientItemSelected="setCompanyMasterID" 
	            CompletionListElementID="listPlacement">
            </asp:AutoCompleteExtender>




</asp:Content>

If Someone Could help me on this matter it could be a great help for me.
Thanks in Advance!!!