The telerik dialogs require a HttpHandler registration in the web.config file

[Darius]

Hi,

I am using RadSpell and RadEditor, and have put following in web.config, but I still get error: "Web.config registration missing! The Telerik dialogs require a HttpHandler registration in the web.config file....". Why do I still get this error, and how do I make it go away ? Thank you.

 

<httpHandlers>
    ...
    <add path="Telerik.Web.UI.DialogHandler.aspx" verb="*" type="Telerik.Web.UI.DialogHandler" validate="false" />
</httpHandlers>
...
<system.webServer>
    <handlers>
        ...
        <add name="Telerik_Web_UI_DialogHandler_aspx" verb="*" preCondition="integratedMode" path="Telerik.Web.UI.DialogHandler.aspx" type="Telerik.Web.UI.DialogHandler" />
    </handlers>
</system.webServer>

[Rumen]

Hello Darius,

There is a very detailed KB article on the matter: Error: Web.config registration missing! The Telerik dialogs require a HttpHandler registration in the web.config file. 

Please, follow the provided instructions to fix the problem and share the solution that works for you with the community.

If you experience any troubles just let us know.

Regards,
Rumen
Progress Telerik

[Darius]

Finally narrowed the issue down to MVC routing. My application is a hybrid MVC-WebForms application. I need to have the following lines of code, but it's causing the Telerik httphandler error for radeditor. Is there a workaround ?

 

public static void RegisterRoutes(RouteCollection routes)
       {

           routes.MapRoute(
               name: "Default",
               url: "{controller}/{action}/{t}",
               defaults: new
               {
                   controller = "xxxx",
                   action = "yyyy",
                   t = UrlParameter.Optional

               }
           );
       }

[Darius]

Thank you Rumen. Number #3 worked in my case in the link you provided. It wasn't the MapRoute that was the issue. I had to add the following Ignore, per instructions:

 

System.Web.Routing.RouteTable.Routes.Ignore("{*dialogs}", new { dialogs = @".*Telerik\.Web\.UI\.DialogHandler\.aspx.*" });

    System.Web.Routing.RouteTable.Routes.Ignore("{*allaxd}", new { allaxd = @".*\.axd(/.*)?" });

[Rumen]

Great news! I am glad that the problem was resolved and everything is fine now :)

Regards,
Rumen
Progress Telerik