Exam 70-486 topic 1 question 70 discussion

ActionFilterAttribute, because "override" keyword can't be used with interface ;-)

Target 1 is ActionFilterAttribute, because it implements IResultFilter Target 2 is OnActionExecuting because log should be written before Action Executed Target 3 is OnResultExecuted, because log should be written after result is returned

This is the Interface namespace Microsoft.AspNetCore.Mvc.Filters { /// <summary> /// A filter that surrounds execution of the action. /// </summary> public interface IActionFilter : IFilterMetadata { /// <summary> /// Called before the action executes, after model binding is complete. /// </summary> /// <param name="context">The <see cref="ActionExecutingContext"/>.</param> void OnActionExecuting(ActionExecutingContext context); /// <summary> /// Called after the action executes, before the action result. /// </summary> /// <param name="context">The <see cref="ActionExecutedContext"/>.</param> void OnActionExecuted(ActionExecutedContext context); } }

Right answer is Target 1: Option 2) public class LogActionFilter : ActionFilterAttribute Target 2: Option 3) OnActionExecuting(ActionExecutingContext filterContext) Target 3: Option 6) OnResultExecuted(ResultExecutedContext filterContext) https://stackoverflow.com/questions/32035121/custom-action-filter-in-mvc

FINAL ANSWER: public class LogActionFilter : ActionFilterAttribute OnActionExecuting(ActionExecutingContext filterContext) OnActionExecuted(ActionExecutedContext filterContext)

FINAL ANSWER: ActionFilterAttribute OnActionExecuting OnActionExecuted

I think onActionExecuted should be the right answer

it s actionFilterAttribute not IFilter because we don't have override when we implement interfaces

You can but ActionFilter is better folllowing SoC and extensibility points

I think so too as you cant implement OnResulting and OnResulted without implementing IResultFilter

The image shown in the solution shows the incorrect answer highlighted for Target 3. However the text below does detail the correct solution (OnActionExecuted...)