MVC global exceptions

Question

I am coding an MVC 5 internet application, and I have a question in regards to handling exceptions globally.

I have my Application_Error setup in my global.asax file. This caters to errors such as 404 HttpExceptions.

How can I send all errors that occur in a controller to the Application_Error function? An example is the following exception:

System.Web.HttpRequestValidationException: A potentially dangerous Request.Form value was detected from the client (name="").

I have written a OnException(ExceptionContext filterContext) for my controller, but am not sure on how to get the Application_Error function to handle these errors. Do I need to pass the exception from the OnException function, or is this the wrong approach?

Thanks in advance.

Answer 1

You can create a global filter by adding the following class to your App_Start folder:-

public class FilterConfig
    {
        public static void RegisterGlobalFilters(GlobalFilterCollection filters)
        {
            filters.Add(new HandleErrorAttribute());

        }
    }

HandleErrorAttribute can be replaced with your own custom Exception Filter.

All you then need to do is make sure you add the following line of code to the App_Start method of your Gloabal.asax :-

 public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            //AreaRegistration.RegisterAllAreas();
            //RouteConfig.RegisterRoutes(RouteTable.Routes);
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        }
    }

Hope this helps.