HttpHandler registration issue

1 Answer 236 Views

UI for ASP.NET AJAX in ASP.NET MVC

Saikat asked on 11 Nov 2021, 11:14 AM

Hi Team,

I am getting the below error while debugging one of our code .

'~/Telerik.Web.UI.WebResource.axd' is missing in web.config. RadStyleSheetManager requires a HttpHandler registration in web.config. Please, use the control Smart Tag to add the handler automatically, or see the help for more information: Controls > RadStyleSheetManager

though the entry is present in the web.config

Can you please help me with this?

1 Answer, 1 is accepted

answered on 15 Nov 2021, 04:42 PM

Hi Saikat,

We have already answered your support ticket on the matter, for convenience I am pasting my colleague Rumen's reply here as well:

Here are a few ideas you can try:

remove RadCompression as it is deprecated

try setting the EnableHandlerDetection property to false for the stylesheet manager and the script manager as it may be that simply the application pool user is not allowed to read the web.config and thus the check fails even if the handler will actually work:

<telerik:RadScriptManager ID="ScriptManager1" runat="server" EnableHandlerDetection="false">
</telerik:RadScriptManager>
<telerik:RadStyleSheetManager runat="server" ID="RadStyleSheetManager1" EnableHandlerDetection="false">
</telerik:RadStyleSheetManager>

review the following article in case the webresource requests themselves break, the most common reason is that authentication blocks them and you'd need to add <location> elements to allow it. Link: https://docs.telerik.com/devtools/aspnet-ajax/general-information/troubleshooting/web-resources-troubleshooting. Example:
```
<configuration>
...
<location path="Telerik.Web.UI.WebResource.axd">
   <system.web>
     <authorization>
       <allow users="*"/>
     </authorization>
   </system.web>
 </location>
...
</configuration>
```
Check for any nested web.config files
Examine other support cases on the topic:
- https://aspnetfaq.com/resolving-the-error-telerik-web-ui-webresource-axd-is-missing-in-web-config/
- https://www.telerik.com/forums/telerik-web-ui-webresource-axd-is-missing-in-web-config

If this does not help you resolve the situation, can you please send me a Fiddler Jam capture?

Regards,
Vessy
Progress Telerik

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