MVC3中如何获取当前的action啊

MVC3中怎么获取当前的action啊？
RT

------解决方案--------------------
二、当前controller、action的获取 
RouteData.Route.GetRouteData(this.HttpContext).Values["controller"] 
RouteData.Route.GetRouteData(this.HttpContext).Values["action"] 
或 
RouteData.Values["controller"] 
RouteData.Values["action"] 

如果在视图中可以用 
ViewContext.RouteData.Route.GetRouteData(this.Context).Values["controller"] 
ViewContext.RouteData.Route.GetRouteData(this.Context).Values["action"] 
或 
ViewContext.RouteData.Values["controller"] 
ViewContext.RouteData.Values["action"]