1. Custom
ActionFilterAttribute
Bryan lin
2014/03/21

2. Agenda
 Introduction of ActionFilterAttribute
 Implementation of custom ActionFilterAttribute

3. Introduction of ActionFilterAttribute
 System.Web.Mvc.ActionFilterAttribute has the ability for inserting some
logics before/after action executing or result executing(such as render
html)

4. Introduction of ActionFilterAttribute
 System.Web.Mvc.ActionFilterAttribute has 4 methods:
 public virtual void OnActionExecuted(ActionExecutedContext filterContext);
 public virtual void OnActionExecuting(ActionExecutingContext filterContext);
 public virtual void OnResultExecuted(ResultExecutedContext filterContext);
 public virtual void OnResultExecuting(ResultExecutingContext filterContext);

5. Introduction of ActionFilterAttribute
 Do something before action executing, we can override the method
 public override void OnActionExecuted(ActionExecutedContext filterContext);
 Do something after action executing, we can override the method
 public override void OnActionExecuting(ActionExecutingContext filterContext);
 Do something before result executing, we can override the method
 public override void OnResultExecuted(ResultExecutedContext filterContext);
 Do something after result executing, we can override the method
 public virtual void OnResultExecuting(ResultExecutingContext filterContext);

6. Implementation of custom
ActionFilterAttribute
 Step 1: Inherit the ActionFilterAttribute

7. Implementation of custom
ActionFilterAttribute
 Step 2: Override the method that you want to add your logics on the
timing

8. Implementation of custom
ActionFilterAttribute
 Step 3: Modify the FilterConfig in App_Start folder and add your custom
ActionFilterAttribute here, that’s all.

9. FAQ