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Thread: Please Help !!! ajax autocomplete extender javascript error 'Access Denied'

  1. #1
    Join Date
    Apr 2008

    Please Help !!! ajax autocomplete extender javascript error 'Access Denied'

    I am using ajax autocomplete extender for a text box. It works fine if I create the webservice that calls the data in my project itself. However, when I try to use a webservice which existing on another project inside my solution, I keep getting the java script error "Access Is Denied".

    Can some one help what is wrong?

    (My source code is below)

    Thank in advance

    This is my AutoComplete.asmx file - this file is in a seperate 'Ajax Enbled web site project'''

    using System;
    using System.Data;
    using System.Web;
    using System.Collections.Generic;
    using System.Web.Services;
    using System.Web.Services.Protocols;
    using System.ComponentModel;

    using System.Web.Script.Services;

    namespace BusinessLogicWS

    /// <summary>

    /// Summary description for AutoComplete

    /// </summary>

    [WebService(Namespace = "")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

    public class AutoComplete : System.Web.Services.WebService


    [WebMethod]public string[] GetCompletionList(string prefixText, int count)

    if (count == 0)

    count = 10;


    if (prefixText.Equals("xyz"))

    return new string[0];

    Random random = new Random();
    List<string> items = new List<string>(count);

    for (int i = 0; i < count; i++)

    char c1 = (char)random.Next(65, 90);
    char c2 = (char)random.Next(97, 122);

    char c3 = (char)random.Next(97, 122);

    items.Add(prefixText + c1 + c2 + c3);


    return items.ToArray();



    This is my ajax auto complete extender control which calls the web service - this is in a class library and within a webpart

    <ajaxToolkit:AutoCompleteExtender runat="server" BehaviorID="AutoCompleteEx" ID="autoComplete1" ServicePath = "http://localhost:49573/AutoComplete.asmx"

    TargetControlID="txtAutoComplete" ServiceMethod="GetCompletionList" MinimumPrefixLength="2"

    CompletionInterval="1000" EnableCaching="true" CompletionSetCount="20" CompletionListCssClass="autocomplete_completionListElement"

    CompletionListItemCssClass="autocomplete_listItem" CompletionListHighlightedItemCssClass="autocomplete_highlightedListItem"

    DelimiterCharacters=";, :">


  2. #2
    Join Date
    May 2007
    "Access Denied" errors mainly occur because of the cross domain access problem in ajax apps. The xmlhttprequest object cannot access data from another domain. You can try using a proxy.
    More on PHP Ajax and other technologies @ my homepage:

  3. #3
    Join Date
    Apr 2007
    Sterling Heights, Michigan
    It can also be caused by IE Security restrictions.

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