asp.net – 无法启用/正在运行Web API属性路由

我有一个简单的ApiController尝试在api / hello / {number}和hello / {number}定义一个HttpGet：

public class HelloController : ApiController
{
    public class Hello
    {
        public string user { get; set; }
        public string password { get; set; }
    }

    [Route("api/hello/{number}")]
    [Route("hello/{number}")]
    [HttpGet]
    public IEnumerable<Hello> GetStuff(int number)
    {
        var response = Request.CreateResponse(HttpStatusCode.Created,number);
        return null;
    }

    [Route("api/hello")]
    [HttpPost]
    public HttpResponseMessage PostHello(Hello value) 
    {
        var response = Request.CreateResponse(HttpStatusCode.Created,value);
        return response;
    }
}

我有这个作为我的RouteConfig,启用属性路由：

public class RouteConfig
{
    public static void RegisterRoutes(RouteCollection routes)
    {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
        routes.MapMvcAttributeRoutes();

        routes.MapRoute(
            name: "Default",url: "{controller}/{action}/{id}",defaults: new { controller = "Home",action = "Index",id = UrlParameter.Optional }
        );
    }
}

WebAPIConfig：

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        config.MapHttpAttributeRoutes();
    }
}

最后,这是我的Application_Start(),我注册了WebApiConfig：

protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);
        GlobalConfiguration.Configure(WebApiConfig.Register);
    }

有没有人看到我失踪的东西？我得到404错误(无法在GetStuff()中遇到断点)以下所有内容：

> http：// localhost / api / hello
> http：// localhost / api / hello / 1
> http：// localhost / hello
> http：// localhost / hello / 2

我的帖子也不起作用.