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()
