FilterAttribute の Order プロパティを指定した場合の実行順序を確認してみた

SampleController.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace MvcApp.Controllers {
	[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = true)]
	public class SampleAttribute : FilterAttribute, IAuthorizationFilter, IActionFilter, IResultFilter, IExceptionFilter {
		private void Log() {
			Trace.WriteLine(string.Format("{0}:{1}", new StackTrace().GetFrame(1).GetMethod().Name, Order));
		}

		public void OnAuthorization(AuthorizationContext filterContext) {
			Log();
		}

		public void OnActionExecuting(ActionExecutingContext filterContext) {
			Log();
		}

		public void OnActionExecuted(ActionExecutedContext filterContext) {
			Log();
		}

		public void OnResultExecuting(ResultExecutingContext filterContext) {
			Log();
		}

		public void OnResultExecuted(ResultExecutedContext filterContext) {
			Log();
		}

		public void OnException(ExceptionContext filterContext) {
			Log();
		}
	}

	[Sample, Sample(Order = 1), Sample(Order = 2)]
	public class SampleController : Controller {
		private void Log() {
			Trace.WriteLine(string.Format("{0}:Controller", new StackTrace().GetFrame(1).GetMethod().Name));
		}

		protected override void OnAuthorization(AuthorizationContext filterContext) {
			Log();
		}

		protected override void OnActionExecuting(ActionExecutingContext filterContext) {
			Log();
		}

		protected override void OnActionExecuted(ActionExecutedContext filterContext) {
			Log();
		}

		protected override void OnResultExecuting(ResultExecutingContext filterContext) {
			Log();
		}

		protected override void OnResultExecuted(ResultExecutedContext filterContext) {
			Log();
		}

		protected override void OnException(ExceptionContext filterContext) {
			Log();
		}

		public ActionResult Index() {
			return new EmptyResult();
		}
		/*
		/sample/index

		OnAuthorization、OnActionExecuting、OnResultExecuting は Order の昇順
		Controller のメソッドは一番最初
		OnActionExecuted と OnResultExecuted は逆順

		OnAuthorization:Controller
		OnAuthorization:-1
		OnAuthorization:1
		OnAuthorization:2
		OnActionExecuting:Controller
		OnActionExecuting:-1
		OnActionExecuting:1
		OnActionExecuting:2
		OnActionExecuted:2
		OnActionExecuted:1
		OnActionExecuted:-1
		OnActionExecuted:Controller
		OnResultExecuting:Controller
		OnResultExecuting:-1
		OnResultExecuting:1
		OnResultExecuting:2
		OnResultExecuted:2
		OnResultExecuted:1
		OnResultExecuted:-1
		OnResultExecuted:Controller
		*/

		public ActionResult Error() {
			throw new Exception("Test");
		}
		/*
		/sample/error

		OnException は逆順
		OnActionExecuted は例外が発生しても呼ばれる様子

		OnAuthorization:Controller
		OnAuthorization:-1
		OnAuthorization:1
		OnAuthorization:2
		OnActionExecuting:Controller
		OnActionExecuting:-1
		OnActionExecuting:1
		OnActionExecuting:2
		型 'System.Exception' の初回例外が MvcApp.dll で発生しました
		OnActionExecuted:2
		OnActionExecuted:1
		OnActionExecuted:-1
		OnActionExecuted:Controller
		OnException:2
		OnException:1
		OnException:-1
		OnException:Controller
		*/
	}
}

ASP.NET MVC でのフィルタリング