MVC :: Onexceptions Execute When Error Happens In Controller?

I have Asp.net mvc project I am new to this project. help me out step by step to catch the Errors in Controler class and Log those errors. what I did here is.

1) Using Enterprise Library 5.0 I configured the Loging and Exceptoin handling.

2) I wrote This Method In ControllerBase Class( please correct me if I am wrong)

protected override void OnException(ExceptionContext filterContext){ // Bail if we can't do anything if (filterContext == null) return; // log var ex = filterContext.Exception ?? new Exception("No further information exists."); LogException(ex); filterContext.ExceptionHandled = true; var data = new ErrorPresentation { ErrorMessage = HttpUtility.HtmlEncode(ex.Message), TheException = ex }; filterContext.Result = View("Error", data); base.OnException(filterContext);}

what do I need to do catch the Controller Error.. How OnException will Execute when some error happens in controller? do i need to code anhything in controller?

4) where do i need to check this Log Information? how?

5) is this OnException Method I wrote like I created One Class and Inherted from Controller class something like this

Namespace ......... : Controller