This is a migrated thread and some comments may be shown as answers.

Menu inside noscript tag

1 Answer 23 Views
Menu
This is a migrated thread and some comments may be shown as answers.
Kam
Top achievements
Rank 1
Kam asked on 03 Oct 2013, 01:43 PM
Hi,

I have implemented a two level radmenu on our website and trying to render a secondary menu in case javascript is disabled on client's browser. I want this second menu to appear under the main menu only if javascript is disabled on the browser, so I am rendering this second radmenu inside <noscript> tag. It works fine as expected when javscript is disabled, and also works fine (menu doesn't appear) if javasript is enabled.
However, I get a javascript error (obviously when it's enabled) :
Error: Sys.ArgumentException: Value must not be null for Controls and Behaviors.
Parameter name: element
By looking at the Call Stack of the browser's developers tool, I think it is due to the following script that gets rendered automatically by telerik on the page (I have trimmed down the syntax)

Sys.Application.add_init(function() {
    $create(Telerik.Web.UI.RadMenu, {"_childListElementCssClass":null,"_enableItemImagesPreloading":true,"_flow":0,"_skin...;
});

It is definitely something to do with radmenu inside <noscript> tag, as if I render it without this tag, and with javascript enabled on browser, everything works fine.

I am using IE 8 with compatibility mode turned on.

Thanks in advance

Kam

1 Answer, 1 is accepted

Sort by
0
Dimitar Terziev
Telerik team
answered on 04 Oct 2013, 01:44 PM
Hi,

In order to use the RadMenu in scenarios when the javascript is disabled, there are two properties which should be set to false. The first one is  RegisterWithScriptManager and the second one is EnableEmbeddedScripts. When these properties are set the framework won't try to execute the $create statement for the menu inside the "noscript" tag. I just want to mention that our controls rely heavily on javascript so you won't be able to interact with the control if the java-script on the page is disabled). Here is a sample markup with the aforementioned properties set to false for the "noscript" menu:
<form id="form1" runat="server">
       <telerik:RadScriptManager ID="RadScriptManager1" runat="server"></telerik:RadScriptManager>
       <div>
           <telerik:RadMenu ID="RadMenu1" runat="server">
               <Items>
                   <telerik:RadMenuItem Text="Item1">
                       <Items>
                           <telerik:RadMenuItem Text="Item1"></telerik:RadMenuItem>
                           <telerik:RadMenuItem Text="Item2"></telerik:RadMenuItem>
                           <telerik:RadMenuItem Text="Item3"></telerik:RadMenuItem>
                       </Items>
                   </telerik:RadMenuItem>
                   <telerik:RadMenuItem Text="Item2"></telerik:RadMenuItem>
                   <telerik:RadMenuItem Text="Item3"></telerik:RadMenuItem>
               </Items>
           </telerik:RadMenu>
           <noscript>
               <telerik:RadMenu ID="RadMenu2" runat="server" RegisterWithScriptManager="false" EnableEmbeddedScripts="false">
                   <Items>
                       <telerik:RadMenuItem Text="Item2">
                           <Items>
                               <telerik:RadMenuItem Text="Item1"></telerik:RadMenuItem>
                               <telerik:RadMenuItem Text="Item2"></telerik:RadMenuItem>
                               <telerik:RadMenuItem Text="Item3"></telerik:RadMenuItem>
                           </Items>
                       </telerik:RadMenuItem>
                       <telerik:RadMenuItem Text="Item2"></telerik:RadMenuItem>
                       <telerik:RadMenuItem Text="Item3"></telerik:RadMenuItem>
                   </Items>
               </telerik:RadMenu>
           </noscript>
       </div>
   </form>


Regards,
Dimitar Terziev
Telerik
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to the blog feed now.
Tags
Menu
Asked by
Kam
Top achievements
Rank 1
Answers by
Dimitar Terziev
Telerik team
Share this question
or