AJAX AutocompleteExtender isn't working. Web Service works - web-services

Question

This is c# .net 2.0. I am using a masterpage.
The WebService works fine on its own.
I am completely stumped. When I type in the TextBox, nothing happens.
Files:
EditTicket.aspx
AutoComplete.asmx
App_Code/AutoComplete.cs
EditTicket.aspx:
<%# Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc2" %>
<asp:ScriptManager id="ScriptManager1" runat="server" EnablepageMethods="true">
<Services>
<asp:ServiceReference Path="AutoComplete.asmx" />
</Services>
</asp:ScriptManager>
<cc2:AutoCompleteExtender
runat="server"
ID="AutoCompleteExtender1"
ServicePath="AutoComplete.asmx"
ServiceMethod="AutoComplete2"
MinimumPrefixLength="1"
CompletionSetCount="12"
TargetControlID="TextBox3"
EnableCaching="True" >
</cc2:AutoCompleteExtender>
<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
AutoComplete.asmx:
<%# WebService Language="C#" CodeBehind="~/App_Code/AutoComplete.cs" Class="AutoComplete" %>
AutoComplete.cs:
using System;
using System.Web;
using System.Collections;
using System.Web.Services;
using System.Web.Script.Services;
using System.Web.Services.Protocols;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;
/// <summary>
/// Summary description for AutoComplete
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ScriptService]
public class AutoComplete : System.Web.Services.WebService {
public AutoComplete () {
//Uncomment the following line if using designed components
//InitializeComponent();
}
[WebMethod]
[ScriptMethod]
public string[] AutoComplete2(string prefixText,int count)
{
string conString = ConfigurationManager.ConnectionStrings["DB"].ConnectionString;
SqlConnection connection = new SqlConnection(conString);
connection.Open();
SqlParameter prm;
string sql = "Select program_name FROM CM_Programs WHERE program_name LIKE #prefixText";
SqlDataAdapter cmd = new SqlDataAdapter(sql, connection);
prm = new SqlParameter("#prefixText", SqlDbType.VarChar, 50);
prm.Value = prefixText+ "%";
cmd.SelectCommand.Parameters.Add(prm);
DataTable dt = new DataTable();
cmd.Fill(dt);
string[] items = new string[dt.Rows.Count];
int i = 0;
foreach (DataRow dr in dt.Rows)
{
items.SetValue(dr["program_name"].ToString(),i);
i++;
}
connection.Close();
return items;
}
}

Answer 1

"Nothing happens" is not an easy description to go on. When you say nothing happens, have you checked that
The server code is being hit for the
web service?
Your query is being executed and
returning results?
Your items array is being populated
correctly?
If "nothing" is that none of the above is happening, I would start checking that there are no javascript errors on the page and that your AutoComplete extender is rendering correctly (examine the page controls in a trace).

Answer 2

Try fiddling with the CompletionInterval property. I have used this control in the past and wasn't seeing the behavior I expected until I set the CompletionInterval to a much lower value. It defaults to 1000 (ms), I would give it a shot with a value of 1, just to see if everything is working as it should (and womp's steps should help to narrow down where the communication issues are happening) and if it does work, keep increasing the value until you hit a value that makes sense (1 ms sends a lot of requests to the server). Report back on what works and what doesn't.