为什么"OnActionExecuted“以相反的顺序执行？

Question

我有两个动作过滤器"ActionFilter1“和"ActionFilter2，

public class ActionFilter1 : FilterAttribute, IActionFilter
{
    public void OnActionExecuting(ActionExecutingContext filterContext)
    {
        HttpContext.Current.Application["Order"] += "Action 1: OnActionExecuting <br/>";
    }

    public void OnActionExecuted(ActionExecutedContext filterContext)
    {
        HttpContext.Current.Application["Order"] += "Action 1: OnActionExecuted <br/>";
    }
}

public class ActionFilter2 : FilterAttribute, IActionFilter
{
    public void OnActionExecuting(ActionExecutingContext filterContext)
    {
        HttpContext.Current.Application["Order"] += "Action 2: OnActionExecuting <br/>";
    }

    public void OnActionExecuted(ActionExecutedContext filterContext)
    {
        HttpContext.Current.Application["Order"] += "Action 2: OnActionExecuted <br/>";
    }
}

我在带有"Order“的控制器操作方法上应用了这两个过滤器，

[ActionFilter1(Order = 1)]
    [ActionFilter2(Order = 2)]
    public ActionResult Index()
    {
        return View();
    }

在浏览器上执行Page时，执行的动作筛选器的输出如下，

行动1: OnActionExecuting

行动2: OnActionExecuting

行动2: OnActionExecuted

行动1: OnActionExecuted

问题-为什么"OnActionExecuted“以相反的顺序执行，而"OnActionExecuting”顺序是正确的，因为我提供了属性？

谢谢,

Answer 1

这是记录在案的行为。这是链接论MSDN

OnActionExecuting(ActionExecutingContext)、OnResultExecuting(ResultExecutingContext)和OnAuthorization(AuthorizationContext)过滤器按前向顺序运行。OnActionExecuted(ActionExecutedContext)、OnResultExecuting(ResultExecutingContext)和OnException(ExceptionContext)过滤器按相反顺序运行。