asp.net-mvc - 如何为所有 Controller 编写 Action 过滤器

Question

这是一个示例操作过滤器。我们知道，当我们编写 Action 过滤器时，我们需要用这样的属性来装饰 Controller ，以便将它用于任何 Controller 。

我想知道是否有任何方法可以编写一个适用于所有 Controller 的操作过滤器，而我不需要用操作过滤器属性来装饰所有 Controller 。有什么想法吗？

[LogActionFilter]
public class HomeController : Controller
{}

public class LogActionFilter : ActionFilterAttribute

     {
          public override void OnActionExecuting(ActionExecutingContext filterContext)
          {
               Log("OnActionExecuting", filterContext.RouteData);       
          }

          public override void OnActionExecuted(ActionExecutedContext filterContext)
          {
               Log("OnActionExecuted", filterContext.RouteData);       
          }

          private void Log(string methodName, RouteData routeData)
          {
               var controllerName = routeData.Values["controller"];
               var actionName = routeData.Values["action"];
               var message = String.Format("{0} controller:{1} action:{2}", methodName, controllerName, actionName);
               Debug.WriteLine(message, "Action Filter Log");
          }

     }

Answer 1

public class LogActionFilterAttribute : IActionFilter
    {
        public void OnActionExecuted(ActionExecutedContext filterContext)
        {
            Log("OnActionExecuted", filterContext.RouteData);    
        }

        public void OnActionExecuting(ActionExecutingContext filterContext)
        {
            Log("OnActionExecuting", filterContext.RouteData);  
        }

        private void Log(string methodName, RouteData routeData)
        {
            var controllerName = routeData.Values["controller"];
            var actionName = routeData.Values["action"];
            var message = String.Format("{0} controller:{1} action:{2}", methodName, controllerName, actionName);
            Debug.WriteLine(message, "Action Filter Log");
        }
    }

public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            GlobalFilters.Filters.Add(new LogActionFilterAttribute());
        }
    }