'undefined' is null or not an object error when using RadMenu for TopSiteMap navigation

[Frank Witte]

I've deployed the Telerik.Web.UI.dll and Telerik.Web.Design.dll into the GAC on my SharePoint 2010 server (Enterprise Edition).
I've added the DLLs to the <SafeControls> section in the web.config of my SharePoint Web Application

Using the Starter Master Pages (codeplex), I've registred the Telerik.Web.UI tag prefix in the Master Page:

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI, Version=2010.2.826.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4" %>

I'm using the default scriptmanager:

<asp:ScriptManager id="ScriptManager" runat="server" EnablePageMethods="false" EnablePartialRendering="true" EnableScriptGlobalization="false" EnableScriptLocalization="true" />

I've replaced the ASPmenu with a RADMenu:

<PublishingNavigation:PortalSiteMapDataSource
            ID="topSiteMap"
            runat="server"
            EnableViewState="false"
            SiteMapProvider="CombinedNavSiteMapProvider"
            StartFromCurrentNode="true"
            StartingNodeOffset="0"
            ShowStartingNode="false"
            TrimNonCurrentTypes="Heading" StartingNodeUrl="/"/>

        <!-- top navigation menu (set to use the new Simple Rendering) -->
        <!--<SharePoint:AspMenu
          ID="TopNavigationMenuV4"
          Runat="server"
          EnableViewState="false"
          DataSourceID="topSiteMap"
          AccessKey="<%$Resources:wss,navigation_accesskey%>"
          UseSimpleRendering="true"
          UseSeparateCss="false"
          Orientation="Horizontal"
          StaticDisplayLevels="1"
          MaximumDynamicDisplayLevels="1"
          SkipLinkText=""
          CssClass="s4-tn">
        </SharePoint:AspMenu>-->
        <telerik:RadMenu ID="TopNavigationTabStrip" runat="server" DataSourceID="topSiteMap" />

When I view the page in IE or Firefox, I get a JavaScript error:

Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; Media Center PC 6.0; InfoPath.3; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET4.0C; .NET4.0E)
Timestamp: Thu, 23 Sep 2010 10:31:37 UTC

Message: 'undefined' is null or not an object
Line: 5
Char: 94383
Code: 0
URI: http://XXX:####/ScriptResource.axd?d=WswgWMgKZb031fWGc9I5ZLzgi20lxIllsJPhxdY4UBJLJ1TFFFRh_e3Vyqj6roU61CRKpyn1RoxLJbHJKmEDp4foWysMWkjHZqVGbNmmHaY1&t=ffffffffec2d9970

 

Have I missed something, or is this a known issue?

[T. Tsonev]

Hello Frank,

I've answered to your bug report. I'm also posting the reply here for community reference.

Everything seems fine with the RadControls registration. The only problem we can spot is the comment you've used to remove the old menu:

<!--<SharePoint:AspMenu>
</SharePoint:AspMenu>-->

This is an HTML comment and it will not stop the control from rendering and registering its scripts. The browser will however ignore the control markup. This is the most likely reason for the error you're receiving.

Please use a server-side comment or remove the content altogether:

<%--<SharePoint:AspMenu>
</SharePoint:AspMenu>--%>

I hope this helps.

Sincerely yours,
Tsvetomir Tsonev
the Telerik team