AutoComplete Not firing

Question

It all looks good below I have provided the 3 parts the service works fine if queried.

/// 

/// Summary description for AutoCompleteService
/// &l         


        

Answer 1

If the autocomplete is JQueryUI and you wish to provide some custom parameters to the autocomplete then you will need to provide a function to set the source. Have a look here this should help you to define it.

Also as @Shadow-Wizzard said you may want to make sure that you have the right id's

Answer 2

try the following code. that is working for me..

  $(document).ready(function () {
        $('[ID$=txtLastname]').live('keyup.autocomplete', function () {

            $(this).autocomplete({
                source: function (request, response) {
                    $.ajax({
                        url: '<%=ResolveUrl("~/Resources/WebService.asmx/LastName") %>',
                        data: "{ 'prefix': '" + request.term + "'}",
                        dataType: "json",
                        type: "POST",
                        contentType: "application/json; charset=utf-8",
                        success: function (data) {
                            response($.map(data.d, function (item) {
                                return {
                                    label: item.split('-')[0],
                                    val: item.split('-')[1]
                                }
                            }))
                        },
                        error: function (response) {
                            alert(response.responseText);
                        },
                        failure: function (response) {
                            alert(response.responseText);
                        }
                    });
                },
                select: function (e, i) {
                },
                minLength: 1
            });
        });

Web method is

 [WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public string[] LastName(string prefix)
{
    List<string> customers = new List<string>();
    using (SqlConnection conn = new SqlConnection())
    {
        string connectionstring = CCMMUtility.GetCacheForWholeApplication();
        conn.ConnectionString = connectionstring;
        using (SqlCommand cmd = new SqlCommand())
        {
            cmd.CommandText = "select distinct top(10) Lastname from tblusers where  " +
            "Lastname  like '%'+ @SearchText + '%' order by Lastname";
            cmd.Parameters.AddWithValue("@SearchText", prefix);
            cmd.Connection = conn;
            conn.Open();
            using (SqlDataReader sdr = cmd.ExecuteReader())
            {
                while (sdr.Read())
                {
                    customers.Add(string.Format("{0}", sdr["Lastname"]));
                }
            }
            conn.Close();
        }
        return customers.ToArray();
    }
}