The code is taken from http://blogs.microsoft.co.il/blogs/shay/archive/2009/03/06/real-world-error-hadnling-in-asp-net-mvc-rc2.aspx and works in ASP.net MVC 1.0 as well
Here's how I handle http exceptions:
protected void Application_Error(object sender, EventArgs e) { Exception exception = Server.GetLastError(); // Log the exception. ILogger logger = Container.Resolve<ILogger>(); logger.Error(exception); Response.Clear(); HttpException httpException = exception as HttpException; RouteData routeData = new RouteData(); routeData.Values.Add("controller", "Error"); if (httpException == null) { routeData.Values.Add("action", "Index"); } else //It's an Http Exception, Let's handle it. { switch (httpException.GetHttpCode()) { case 404: // Page not found. routeData.Values.Add("action", "HttpError404"); break; case 500: // Server error. routeData.Values.Add("action", "HttpError500"); break; // Here you can handle Views to other error codes. // I choose a General error template default: routeData.Values.Add("action", "General"); break; } } // Pass exception details to the target error View. routeData.Values.Add("error", exception); // Clear the error on server. Server.ClearError(); // Avoid IIS7 getting in the middle Response.TrySkipIisCustomErrors = true; // Call target Controller and pass the routeData. IController errorController = new ErrorController(); errorController.Execute(new RequestContext( new HttpContextWrapper(Context), routeData)); } 
