在BaseController的OnActionExecuting之前调用FilterAttribute的OnActionExecuting

Question

我有一个BaseController我ViewData通过覆盖在集合中放入一些数据OnActionExecuting.

现在我有一个ChildController不需要该视图数据的Action .

为此,我创建了一个DontPopulateViewDataActionFilterAttribute,在其上设置bool,以BaseController防止BaseController填充viewdata.

问题:ActionFilters OnActionExecuting方法在BaseController之前和之后调用.

ActionFilters是否会OnActionExecuting在基本控制器中被覆盖之前被调用,有没有办法解决这个问题？

Answer 1

除了马尔万是什么张贴Aouida并建议(使用基类的一个ActionFilter),我不认为你将能够创建一个基类的OnActionExecuting()重载之前执行一个ActionFilter.以下代码:

 [MyActionFilter(Name = "Base", Order = 2)]
 public class MyBaseController : Controller
 {
     protected override void OnActionExecuting(ActionExecutingContext filterContext)
     {
        Response.Write("MyBaseController::OnActionExecuting()<br>");
        base.OnActionExecuting(filterContext);
     }

     protected override void Execute(System.Web.Routing.RequestContext requestContext)
     {
        requestContext.HttpContext.Response.Write("MyBaseController::Execute()<br>");
        base.Execute(requestContext);
     }

    protected override void OnActionExecuted(ActionExecutedContext filterContext)
    {
        Response.Write("MyBaseController::OnActionExecuted()<br>");
        base.OnActionExecuted(filterContext);
    }
 }

 public class MyActionFilter : ActionFilterAttribute
 {
    public string Name;

    public override void OnActionExecuted(ActionExecutedContext filterContext)
    {
        filterContext.HttpContext.Response.Write("MyActionFilter_" + Name + "::OnActionExecuted()<br>");
        base.OnActionExecuted(filterContext);
    }

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        filterContext.HttpContext.Response.Write("MyActionFilter_" + Name + "::OnActionExecuting()<br>");
        base.OnActionExecuting(filterContext);
    }
 }

 public class MyTestController : MyBaseController
 {
     [MyActionFilter(Name = "Derived", Order = 1)]
     public void Index()
     {
        Response.Write("MyTestController::Index()<br>");
     }
 }

产生这个输出:

MyBaseController::Execute()
MyBaseController::OnActionExecuting()
MyActionFilter_Derived::OnActionExecuting()
MyActionFilter_Base::OnActionExecuting()
MyTestController::Index()
MyActionFilter_Base::OnActionExecuted()
MyActionFilter_Derived::OnActionExecuted()
MyBaseController::OnActionExecuted()