问未通过属性路由找到子文件夹中的Web API控制器

EN

Site
-Controllers
--API
---EventsController.cs

[RoutePrefix("api")]
public class EventsController : Controller
{
    [Route("event")]
    public ActionResult Index()
    {
        return View("~/Views/Home/Index.cshtml");
    }

public static void Register(HttpConfiguration config)
{
    // Web API configuration and services

    // Web API routes
    config.MapHttpAttributeRoutes();

    config.Routes.MapHttpRoute(
        name: "DefaultApi",
        routeTemplate: "api/{controller}/{id}",
        defaults: new { id = RouteParameter.Optional }
    );
}

<Error>
  <Message>
    No HTTP resource was found that matches the request URI 'http://127.0.0.1:8080/api/event'.
  </Message>
  <MessageDetail>
    No type was found that matches the controller named 'event'.
  </MessageDetail>
</Error>

public static void Register(HttpConfiguration config)
{
    // Web API configuration and services

    // Web API routes
    config.MapHttpAttributeRoutes();

    //config.Routes.MapHttpRoute(
    //  name: "DefaultApi",
    //  routeTemplate: "api/{controller}/{id}",
    //  defaults: new { id = RouteParameter.Optional }
    //);
}