Custom ActionFilterAttributeBryan lin

2014/03/21

Agenda

Introduction of ActionFilterAttribute

Implementation of custom ActionFilterAttribute

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)

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);

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);

Implementation of custom ActionFilterAttribute

Step 1: Inherit the ActionFilterAttribute

Implementation of custom ActionFilterAttribute

Step 2: Override the method that you want to add your logics on the timing

Implementation of custom ActionFilterAttribute

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

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