我有一个BaseController,我在其中通过重写OnActionExecuting在ViewData集合中放入一些数据.
现在我在ChildController中有一个不需要该视图数据的Action.
为此,我创建了一个DontPopulateViewData ActionFilterAttribute,它在BaseController上设置一个bool,阻止BaseController填充viewdata.
问题:ActionFilters OnActionExecuting方法在BaseController中调用之后而不是之前调用.
在基本控制器中重写OnActionExecuting之前是否总是会调用ActionFilters,有没有办法解决这个问题?
解决方法
除了Marwan Aouida发布和建议的内容(在基类上使用ActionFilter)之外,我认为您无法创建在基类的OnActionExecuting()重载之前执行的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()