问ASP.NET WebApi HelpPage如何避免显示指向同一资源的多个路由

EN

config.Services.Replace(typeof(IApiExplorer), new CustomApiExplorer(config));

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

public class CustomApiExplorer : ApiExplorer
{
    public CustomApiExplorer(HttpConfiguration config) : base(config) { }

    public override bool ShouldExploreAction(string actionVariableValue, HttpActionDescriptor actionDescriptor, IHttpRoute route)
    {
        //get current route name
        string routeNameKey = "routeName";
        if(route.DataTokens.ContainsKey(routeNameKey))
        {
            string routeName = (string)route.DataTokens[routeNameKey];

            ReflectedHttpActionDescriptor descriptor = (ReflectedHttpActionDescriptor)actionDescriptor;

            if(routeName == "DefaultApi" 
                && descriptor.ControllerDescriptor.ControllerType == typeof(ValuesController)
                && descriptor.ActionName == "Something")
            {
                return false; //do not show this action for this particular route
            }
        }

        // for other actions let the default behavior take place
        return base.ShouldExploreAction(actionVariableValue, actionDescriptor, route);
    }
}

/// <summary>
/// Out of the box Web API doesn't provide any 'MapHttpRoute' extension which takes in the 'data tokens', so here
/// we are creating a new extension.
/// </summary>
public static class MyExtensions
{
    public static IHttpRoute MapHttpRoute(this HttpRouteCollection routes, string name, string routeTemplate, 
                                            object defaults, object constraints, object dataTokens, 
                                            HttpMessageHandler handler)
    {
        if (routes == null)
        {
            throw new ArgumentNullException("routes");
        }

        HttpRouteValueDictionary defaultsDictionary = new HttpRouteValueDictionary(defaults);
        HttpRouteValueDictionary constraintsDictionary = new HttpRouteValueDictionary(constraints);
        HttpRouteValueDictionary dataTokensDictionary = new HttpRouteValueDictionary(dataTokens);
        IHttpRoute route = routes.CreateRoute(routeTemplate, defaultsDictionary, constraintsDictionary, dataTokensDictionary, handler: handler);
        routes.Add(name, route);
        return route;
    }
}