Error pages not found, throwing ELMAH error with Custom Error Pages

Question

I\'ve made some modifications to Global.asax so that I can show custom error pages (403, 404, and 500) Here\'s the code:

    public class MvcApplication : Sy         


        

Answer 1

If you are running in IIS 7 integrated mode, you will need to add Response.TrySkipIisCustomErrors = true; in Application_Error. Otherwise IIS will still redirect the client to a custom error page, despite anything you do in code.

See here for additional details: http://www.west-wind.com/weblog/posts/2009/Apr/29/IIS-7-Error-Pages-taking-over-500-Errors

Edit: here's the body of my Application_Error:

if (HttpContext.Current != null)
{
    Server.ClearError();
    Response.TrySkipIisCustomErrors = true;
    RouteData data = new RouteData();
    data.Values.Add("controller", "Error");
    data.Values.Add("action", "Error");
    IController controller = new MyApp.Controllers.ErrorController();
    controller.Execute(new RequestContext(new HttpContextWrapper(Context), data));
}

Answer 2

Finally got it working to my satisfaction...

The Elmah.Mvc package applies a "hidden" error handler. I've disabled this by adding the following line in web.config <appSettings> (the value was set to "false" by default from nuget install)

<add key="elmah.mvc.disableHandleErrorFilter" value="true" />

So, now my errors propagate up to Application_Error and are logged by Elmah, bypassing the Elmah filter, and display the proper error page (not the one in /shared/error.cshtml)