Yet another instance of an ASP.net AJAX SYS Undefined Error

I am facing a challenging situation with my ASP.net 2.0 Web Project developed in VS 2008. The issue is occurring on my development XP system as well as our Windows 2000 and 2008 servers. The project utilizes AJAX 1 and makes references to System.Web.Extensions 1.0.61025.0 and AJAXControlToolkit 1.0.10618.0.

My aim is to utilize the ScriptManager and potentially the ToolkitScriptManager control to assist with embedding JavaScript files.

Prior to attempting embedding, I need to resolve the notorious SYS undefined JavaScript error. When using the ScriptManager to include JavaScript files via the Path attribute, it functions properly. Though the SYS error persists, the JavaScript files are included on the generated page and function correctly. Currently, I am working with a blank page containing only test text. This page is encapsulated within a MasterPage that includes an empty ScriptManager.

During debugging of this page, an error arises regarding Sys.WebForms.PageRequestManager (refer to HTML code below).

I have gone through the process of uninstalling and reinstalling AJAX, copying the System.Web.Extensions to my bin directory, scrutinizing my web.config settings countless times, and exploring numerous search results pages, forums, and blogs until dizzy.

I recognize that it may be something simple that I am overlooking. Below is my condensed code; can anyone assist me in troubleshooting and pinpoint what I am missing?

Thank you

Web.config

<?xml version="1.0"?>
<configuration>
  <configSections>
    <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
      <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
        <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication"/>
        <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
          <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="Everywhere" />
          <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication" />
          <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication" />
        </sectionGroup>
      </sectionGroup>
    </sectionGroup>
  </configSections>

  <appSettings>
    …
  </appSettings>


...truncated for brevity...

MasterPage

<%@ Master Language="C#" AutoEventWireup="true" Codebehind="…" Inherits="…" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    …
</head>
<body>
    <form id="form1" runat="server">
        <asp:ScriptManager runat="server" ID="ScriptManager" />
…
    </form>
</body>
</html>

Content ASPX Page

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="…" Inherits="…" MasterPageFile="…" %>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
    <div>
    Hello from TestMaster.aspx
    </div>
</asp:Content>

Generated HTML

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head><title>
    Untitled Page
</title>
    <link href="App_Themes/GFYStyle/main-styles.css" type="text/css" rel="stylesheet" /><link href="App_Themes/GFYStyle/menu.css" type="text/css" rel="stylesheet" /></head>
<body>
    <form name="aspnetForm" method="post" action="testmaster.aspx" id="aspnetForm">
<div>
<input type="hidden" name="__EVENTTARGET" id="__EVENTTARGET" value="" />
<input type="hidden" name="__EVENTARGUMENT" id="__EVENTARGUMENT" value="" />
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwULLTEwMDUyNjYzMjhkZA==" />
</div>

<script type="text/javascript">
//<![CDATA[
var theForm = document.forms['aspnetForm'];
if (!theForm) {
    theForm = document.aspnetForm;
}
function __doPostBack(eventTarget, eventArgument) {
    if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
        theForm.__EVENTTARGET.value = eventTarget;
        theForm.__EVENTARGUMENT.value = eventArgument;
        theForm.submit();
    }
}
//]]>
</script>

...truncated for brevity...
c#asp.netjavascriptajax

Answer №1

I've encountered this issue previously.

Look for the embedded JavaScript files in ajax toolkit and check their modified dates. Make sure they are not dated in the future.

To confirm, inspect the links that appear in the view source with *.axd and try running each one. If you encounter an error with any of them, that's likely where the problem lies.

Best regards

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