Best practices for asp.net mvc error handling [closed]

Question

I'm looking for a standard way to handle errors in asp.net mvc 2.0 or 3.0

• 404 error handler
• Controller scope exception error handler
• Global scope exception error handler

Answer 1

For controller scope errors try using a custom Exception attribute i.e.

public class RedirectOnErrorAttribute : FilterAttribute, IExceptionFilter
{
    public void OnException(ExceptionContext filterContext)
    {

        // Don't interfere if the exception is already handled
        if(filterContext.ExceptionHandled)
        return;

        //.. log exception and do appropriate redirects here

     }
}

Then decorate the controllers with the attribute and error handling should be yours

[RedirectOnError]
public class TestController : Controller
{
     //.. Actions etc...
}

Doesn't help if the error is with the routing though - i.e. it can't find a controller in the first place. For that try the Application Error handler in Global.asax i.e.

 protected void Application_Error(object sender, EventArgs e)
 {
      //.. perhaps direct to a custom error page is here
 }

I don't know if it's 'best practice' though. Does work.