MVC Override OnException Error: No suitable method found to override - asp.net-mvc-3

Question

I'm trying to override OnException in Global.asax to handle error and writing log. I'm not sure which part is wrong, I keep on getting the error "MyApp.MvcApplication.OnException(System.Web.Mvc.ExceptionContext)': no suitable method found to override" whenever I rebuild my solution.
this is the code I have in Application_Start()
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
WebApiConfig.Register(GlobalConfiguration.Configuration);
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
AuthConfig.RegisterAuth();
}
And this is the code I have in OnException()
protected override void OnException(ExceptionContext context)
{
Exception ex = context.Exception;
if (!string.IsNullOrEmpty(ex.Message) ||
!string.IsNullOrEmpty(ex.Source.ToString()) ||
!string.IsNullOrEmpty(ex.StackTrace))
{
WriteLog(ex.Message.ToString(), ex.StackTrace.ToString(), ex.Source.ToString(), "0");
context.Result = new ViewResult
{
ViewName = String.Format("~/ErrorPage/ErrorPage?message={0}&stack={1}&source={2}", HttpUtility.UrlEncode(ex.Message), HttpUtility.UrlEncode(ex.StackTrace), HttpUtility.UrlEncode(ex.Source))
};
}
context.ExceptionHandled = true;
}
The WriteLog() function is tested working in other application, I don't think there's any problem in it and I even tried:
protected override void OnException(ExceptionContext context) {
Exception ex = context.Exception;
context.Result = new ViewResult
{
ViewName = "~/Shared/Error.cshtml";
};
context.ExceptionHandled = true;
}
But nothing work. The error just remain there.
How could such problem occur and how do I fix it? I read many tutorial about this, I don't think I'm spelling OnException() wrongly.
Please help. Thanks

Answer 1

There isn't any OnException inside Global.asax
You have two ways:
Create your own HandleErrorAttribute and register in FilterConfig.cs
public class HandleExceptionsAttribute : HandleErrorAttribute
{
public override void OnException(ExceptionContext filterContext)
{
(...)
}
}
FilterConfig.cs:
public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
filters.Add(new HandleExceptionsAttribute());
(...)
}
Or, if you have a BaseController where all controllers are inherited from, override the OnException method.
PS: I would go for the filter one.

Answer 2

There is no method OnException in the global asax, that method belongs to the controllers.to handle errors in the global asax use the method Application_Error(object sender, EventArgs e)