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IIS7 and Telerik.Web.UI.WebResource.axd' is missing in web.config

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

Stephen asked on 18 Jun 2008, 11:32 PM

Hello,

I am running Windows Server 2008 (IIS7) and am getting the following error:

'~/Telerik.Web.UI.WebResource.axd' is missing in web.config. RadScriptManager requires a HttpHandler registration in web.config.

I have already found information in the forum and your troubleshooting guides about moving the Telerik handler from the HttpHandler section to the system.webServer handlers area. I have this in my web.config:

    
            <system.webServer> 
        
                <handlers> 
        
                ...     
        
                <add path="Telerik.Web.UI.WebResource.axd" verb="*" type="Telerik.Web.UI.WebResource, Telerik.Web.UI, Version=2008.1.415.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4" 
        
                     name="Telerik.Web.UI.WebResource"/> 
        
                </handlers> 
        
                ... 
        
            </system.webServer>

However, when I try to run my page that has an RadScriptManager on it, I get the error mentioned earlier. The handler does not appear to be loading.

Any help with this would be appreciated.

Thanks,
Stephen

27 Answers, 1 is accepted

answered on 21 Aug 2008, 12:28 PM

RadScriptManager_VS2005.png

Hello Adam,

I cannot reproduce this issue - take a look at the screenshot I attached. Could you please try to create a new project and check if the problem still persists?

Regards,
Daniel
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

answered on 12 Mar 2009, 01:09 AM

Even though your OS has IIS7, your project may be configured to use the ASP.NET Development Web Server when you run your project (by pressing F5). For me, I added the handler definition to BOTH sections of the web.config, once in /configuration/system.webServer/handlers and again in /configuration/system.web/httpHandlers, using the short type notation mentioned by Erjan.

I added it to both because I wanted to debug locally using Visual Studio's WebDevServer as well as show it to others on my team using IIS7.

I also took out the strong typing information and used the short notation simply because it's not needed unless you're loading out of the GAC or targeting a specific version... Complications for down the road!

Wes

answered on 28 Sep 2009, 02:28 AM

Make sure you are running your app pool in classic mode.

Try adding this to your web config, especially if it starts working after you login. Basically the security can block access to the axd call.

    
            <location path="Telerik.Web.UI.WebResource.axd">  
        
                    <system.web> 
        
                        <authorization> 
        
                            <allow users="*" /> 
        
                        </authorization> 
        
                    </system.web> 
        
                </location>

answered on 06 Jan 2010, 10:05 PM

Here is one more bit of information for anybody trying to use Telerik controls under SharePoint 2007 with IIS7. I was getting the generic 'An error has occurred' SharePoint message when my web part that uses Telerik controls tried to load. Here is the solution:

If the app pool for your SharePoint site is set to Classic mode rather than Integrated, you'll need to add an entry for the handler under <httpHandlers> as described for IIS 5/6. If the app pool is set to Integrated mode then you'll need to add the handler to <system.webServer> as described for IIS 7. The usual caveats regarding GAC deployment versus bin apply, like needing to include the version number of the assembly when it's stored in the GAC, etc. I added entries to both sections and things seem to be fine.

Note to any Telerik people reading this: the documentation on adding the handler for IIS 7 says "When in Integrated mode, IIS7 reads the application configuration from the <system.webServer> section group in the application configuration file". That's all well and good, but it doesn't go on to say what is required when not in Integrated mode. One sentence saying you have to fall back to the IIS 6 instructions in that case would be useful.

answered on 30 Mar 2011, 02:38 PM

Hello,

I'm having the same issue. Getting the "'~/Telerik.Web.UI.WebResource.axd' is missing in web.config. RadScriptManager requires a HttpHandler registration in web.config." error.

My configuration :

Windows 7
IIS 7
Application Pool running asp.net V2.0 with Integrated pipeline.
Telerik.Web.UI.DLL is NOT in my GAC.
The application is using .NET 3.5 with Telerik ASP.NET AJAX controls version 2009.2.920.35.

BTW, design mode is not working. I'm getting the "Failed to create designer ' error.
In my web.config, I tried :
        <httpHandlers>
            <add path="Telerik.Web.UI.WebResource.axd" verb="*" type="Telerik.Web.UI.WebResource, Telerik.Web.UI, Version=2009.2.920.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4" validate="false" />
        </httpHandlers>

AND
         <httpHandlers>
            <add path="Telerik.Web.UI.WebResource.axd" verb="*" type="Telerik.Web.UI.WebResource, Telerik.Web.UI" validate="false" />
        </httpHandlers>

Both of them not working.

If I put in the <system.webserver><handlers>, then the compiler generates an error : "Unrecognized configuration section system.webserver".

I have no idea what I can try next.   Any thoughts?

Thank you,
Annie

answered on 01 Mar 2012, 08:26 PM

It seems that this problem is very common.

I have the same issue however none of the posted solutions have worked for me.

I have IIS 7.5 running on W2008 R2 SP1

I have this entry:

 45:     <handlers>
 46:       <add name="Telerik.Web.UI.WebResource" verb="*" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource, Telerik.Web.UI" />
 47:     </handlers>

and this is the error I get

Cannot add duplicate collection entry of type 'add' with unique key attribute 'name' set to 'Telerik.Web.UI.WebResource'

I have tried both ASP.NET 4.0 Classic and ASP.NET 4.0 with the same results

Please help

This is the server error:

HTTP Error 500.19 - Internal Server Error

The requested page cannot be accessed because the related configuration data for the page is invalid.

answered on 26 Aug 2012, 08:24 AM

I have the same Problem too i got an Error

HTTP Error 500.19 - Internal Server Error

when i Add this Tag

       <handlers>
         <add name="Telerik.Web.UI.WebResource" verb="*" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource, Telerik.Web.UI" />
       </handlers>

I'm using AJAX Rad Control Q1 2102 in project based on framework 4 hosted on Godaddy ,
when i comment the this Tag in the webconfig the site loaded successfully but the radscript manager or loading panel does not work and and all the grid commands cause post back for all page , I'm not happy for this issue ): .and hope any one can help ?

answered on 20 Nov 2013, 12:29 PM

simple-web-config.zip

Hi,

For IIS7+ when the application pool is in integrated mode you need to add the HTTP handlers a little differently: http://www.telerik.com/help/aspnet-ajax/introduction-registering-the-httphandlers-on-windows-vista-iis-7-integrated-mode.html. I am also adding here a simple web.config file that shows all our handlers and modules registrations, so you can use it as base. If the handlers are not read properly the scripts the controls require will not be present on the page and thus the controls will not function.
Another option is to use the scripts cdn for scripts and/or the skins cdn for the stylesheets.

Regards,
Marin Bratanov
Telerik

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