ActionFilterAttribute的Ninject 2属性注入不工作

我有一个方法属性,它期望Ninject2注入几个属性,但是 userSession 和 jobRepository 将显示为空:

[AttributeUsage(AttributeTargets.Method, AllowMultiple = false)]
public class JobAttribute : ActionFilterAttribute {
    [Inject]
    private IUserSession userSession;

    [Inject]
    private IJobRepository jobRepository;

    public override void OnActionExecuting(ActionExecutingContext filterContext) {
        var filter = new JobFilter(userSession, jobRepository);

        filter.OnActionExecuting(filterContext);
    }
}

控制器中的方法如下:

[AcceptGet, Job]
public ActionResult Dimensions(Job job) {
    return View(job.Building);
}

我知道设置正在运行,因为如果我在控制器上使用构造函数注入,控制器的参数就会被注入。这对属性没有太大帮助,尽管需要使用属性注入。我是不是错过了什么?

以下是global.asax.cs的相关药水:

public class MvcApplication : Ninject.Web.Mvc.NinjectHttpApplication {
    protected override void OnApplicationStarted() {
        RegisterRoutes(RouteTable.Routes);
        RegisterAllControllersIn(Assembly.GetExecutingAssembly());
    }

    ...snip...

    protected override IKernel CreateKernel() {
        return new StandardKernel(
            new RepositoryConfiguration(),
            new AuthenticationModule(),
            new AutoMapperConfiguration()
        );
    }
}

public class RepositoryConfiguration : NinjectModule {
    public override void Load() {
        Bind<ICustomerRepository>().To<CustomerRepository>();
        Bind<IJobRepository>().To<JobRepository>();
    }
}

public class AuthenticationModule : NinjectModule {
    public override void Load() {
        Bind<MbdQuote.Core.AppService.IUserSession>().To<UserSession>();
    }
}