使用 Html.Action 时，ControllerContext 为 null 且 BaseController.OnActionExecuting() 未调用
我们使用 BaseController 在每个操作执行之前缓存基本身份验证信息：
public abstract class BaseController : Controller
{
protected bool IsLoggedIn { get; set; }
protected string Username { get; set; }
...
protected override void OnActionExecuting(ActionExecutingContext filterContext)
{
var identity = base.User.Identity;
this.IsLoggedIn = identity.IsAuthenticated;
this.Username = identity.Name;
...
}
}
并且我们的子控制器具有主页（Index）和部分视图（GetNavigation）的操作：
[Authorize]
public partial class CollaborationController : BaseController
{
[HttpGet]
public virtual ViewResult Index()
{
var viewModel = this.MakeViewModel<FullPageViewModel>();
return this.View(MVC.Collaboration.Views.Index, viewModel);
}
[HttpGet]
public virtual PartialViewResult GetNavigation()
{
var viewModel = NavigationViewModel.Make(this.User);
return this.PartialView(MVC.Collaboration.Views.Navigation, viewModel);
}
}
并且部分视图直接渲染with Html.Action()：
@Html.Action(MVC.Collaboration.GetNavigation())
看起来应该可以工作，但是 BaseController.OnActionExecuting 不会被调用。我什至无法直接调用它，因为 this.ControllerContext 和 base.User 都是 null。我还尝试对 ActionFilterAttribute 进行子类化，但它的 OnActionExecuting 方法也没有被调用。
We use a BaseController to cache basic authentication information before every action executes:
public abstract class BaseController : Controller
{
protected bool IsLoggedIn { get; set; }
protected string Username { get; set; }
...
protected override void OnActionExecuting(ActionExecutingContext filterContext)
{
var identity = base.User.Identity;
this.IsLoggedIn = identity.IsAuthenticated;
this.Username = identity.Name;
...
}
}
And our child controller has a actions for the main page (Index) and a partial view (GetNavigation):
[Authorize]
public partial class CollaborationController : BaseController
{
[HttpGet]
public virtual ViewResult Index()
{
var viewModel = this.MakeViewModel<FullPageViewModel>();
return this.View(MVC.Collaboration.Views.Index, viewModel);
}
[HttpGet]
public virtual PartialViewResult GetNavigation()
{
var viewModel = NavigationViewModel.Make(this.User);
return this.PartialView(MVC.Collaboration.Views.Navigation, viewModel);
}
}
And the partial view is rendered directly with Html.Action():
@Html.Action(MVC.Collaboration.GetNavigation())
Seems like it should work, but BaseController.OnActionExecuting does not get called. And I can't even call it directly because this.ControllerContext and base.User are both null. I also tried subclassing ActionFilterAttribute, but its OnActionExecuting method doesn't get called, either.
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我知道这是一个老问题，但这是我处理这个问题的方法。在我的子控制器中，我创建 OnActionExecuting 方法并从那里调用基本控制器。
I know this is an old question but here is how I handle this. In my child controller I create the OnActionExecuting method and call the base controller from there.
至少有点回答了我自己的问题：
替换
修复
它。 MVCContrib 的语法似乎是罪魁祸首，有人知道为什么吗？更好的是，有人知道一种解决方法可以让我避免那些讨厌的、非重构安全的魔法字符串吗？
At least sort-of answered my own question:
Substituting
for
fixes it. MVCContrib's syntax seems to be the culprit, anyone know why? Even better, anyone know a work-around that lets me avoid those nasty, non-refactoring-safe, magic strings?