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过滤器有4种

类别	实现接口	默认类实现	说明
Authorization	IAuthorizationFilter	AuthorizeAttribute	在所有的Action之前以及所有的过滤器运行之前执行，实现权限验证
Action	IActionFilter	ActionFilterAttribute	在Action将要执行和执行后运行，但是在Result之前
Result	IResultFilter	ActionFilterAttribute	在将要返回Result之前和之后运行
Exception	IExceptionFilter	HandleErrorAttribute	在执行Filter和Action过程中出现异常时运行，可用于异常处理

　　因为Controller类也实现了上面的4个接口 IActionFilter, IAuthorizationFilter, IExceptionFilter, IResultFilter，因此在Controller类中，也可以实现对应的方法。执行顺序如下：

　　

[MyAuthorizationFilter][MyActionFilter]public class IndexController : Controller{public ActionResult Index(){Response.Write("我是IndexController中的Index<hr />");return View();}protected override void OnAuthorization(AuthorizationContext filterContext){filterContext.HttpContext.Response.Write("我是IndexController中的OnAuthorization<hr />");base.OnAuthorization(filterContext);}protected override void OnActionExecuting(ActionExecutingContext filterContext){filterContext.HttpContext.Response.Write("我是IndexController中的OnActionExecuting<hr />");base.OnActionExecuting(filterContext);}protected override void OnActionExecuted(ActionExecutedContext filterContext){filterContext.HttpContext.Response.Write("我是IndexController中的OnActionExecuted<hr />");base.OnActionExecuted(filterContext);}protected override void OnResultExecuting(ResultExecutingContext filterContext){filterContext.HttpContext.Response.Write("我是IndexController中的OnResultExecuting<hr />");base.OnResultExecuting(filterContext);}protected override void OnResultExecuted(ResultExecutedContext filterContext){filterContext.HttpContext.Response.Write("我是IndexController中的OnActionExecuted<hr />");base.OnResultExecuted(filterContext);}}

 public class MyActionFilter : ActionFilterAttribute{public override void OnActionExecuting(ActionExecutingContext filterContext){filterContext.HttpContext.Response.Write("我是MyActionFilter中的OnActionExecuting<hr />");base.OnActionExecuting(filterContext);}public override void OnActionExecuted(ActionExecutedContext filterContext){filterContext.HttpContext.Response.Write("我是MyActionFilter中的OnActionExecuted<hr />");base.OnActionExecuted(filterContext);}public override void OnResultExecuting(ResultExecutingContext filterContext){filterContext.HttpContext.Response.Write("我是MyActionFilter中的OnResultExecuting<hr />");base.OnResultExecuting(filterContext);}public override void OnResultExecuted(ResultExecutedContext filterContext){filterContext.HttpContext.Response.Write("我是MyActionFilter中的OnResultExecuted<hr />");base.OnResultExecuted(filterContext);}}

 public class MyAuthorizationFilter:AuthorizeAttribute{public override void OnAuthorization(AuthorizationContext filterContext){filterContext.HttpContext.Response.Write("我是MyAuthorizationFilter中的OnAuthorization<hr />");return;}}

全局Controller配置，在Controller级中添加，对应的Action放在对应的Action级中添加。如果是整个项目注册，是在App_Start中FilterConfig中配置。