一个简单的ActionFilter

  
    

   
     
   
      [AttributeUsage(AttributeTargets.Class
   
     |
   
     AttributeTargets.Method,
 Inherited
   
     =
   
     true
   
     ,AllowMultiple
   
     =
   
     true
   
     )]
 
   
     public
   
      
   
     class
   
      LogAttribute :FilterAttribute,IActionFilter,IResultFilter
 {
 
   
     public
   
      
   
     string
   
      LogName { 
   
     get
   
     ; 
   
     set
   
     ; }

 
   
     public
   
      
   
     void
   
      Log(
   
     string
   
      controller, 
   
     string
   
      action, 
   
     string
   
      msg)
 {
 
   
     if
   
      (
   
     !
   
     string
   
     .IsNullOrEmpty(LogName))
 {
 TextWriter writer 
   
     =
   
      
   
     new
   
      StreamWriter(LogName, 
   
     true
   
     );
 writer.WriteLine(
   
     "
   
     Time:{0}
   
     "
   
     , DateTime.Now.ToString(
   
     "
   
     yyyy-MM-dd hh:mm:ss
   
     "
   
     ));
 writer.WriteLine(
   
     "
   
     Controller:{0}
   
     "
   
     , controller);
 writer.WriteLine(
   
     "
   
     Action:{0}
   
     "
   
     , action);
 writer.WriteLine(
   
     "
   
     Msg:{0}
   
     "
   
     , msg);
 writer.WriteLine(
   
     "
   
     System:{0}
   
     "
   
     , System.Environment.OSVersion.Version.ToString());
 writer.WriteLine(
   
     "
   
     ThreadID:{0}
   
     "
   
     , AppDomain.GetCurrentThreadId());
 writer.Close();
 }
 }

 
   
     public
   
      
   
     void
   
      OnActionExecuting(ActionExecutingContext filterContext)
 {
 Log(filterContext.RouteData.Values[
   
     "
   
     controller
   
     "
   
     ].ToString(), filterContext.RouteData.Values[
   
     "
   
     action
   
     "
   
     ].ToString(), 
   
     "
   
     Action Executing...
   
     "
   
     );
 }

 
   
     public
   
      
   
     void
   
      OnActionExecuted(ActionExecutedContext filterContext)
 {
 Log(filterContext.RouteData.Values[
   
     "
   
     controller
   
     "
   
     ].ToString(), filterContext.RouteData.Values[
   
     "
   
     action
   
     "
   
     ].ToString(), 
   
     "
   
     Action Executed.
   
     "
   
     );
 }

 
   
     public
   
      
   
     void
   
      OnResultExecuting(ResultExecutingContext filterContext)
 {
 Log(filterContext.RouteData.Values[
   
     "
   
     controller
   
     "
   
     ].ToString(),
 filterContext.RouteData.Values[
   
     "
   
     action
   
     "
   
     ].ToString(),
 
   
     "
   
     Result executing...
   
     "
   
     );
 }

 
   
     public
   
      
   
     void
   
      OnResultExecuted(ResultExecutedContext filterContext)
 {
 Log(filterContext.RouteData.Values[
   
     "
   
     controller
   
     "
   
     ].ToString(),
 filterContext.RouteData.Values[
   
     "
   
     action
   
     "
   
     ].ToString(),
 
   
     "
   
     Result executed
   
     "
   
     );
 }

 }