[具有路由属性的Web API版本控制时如何获取控制器名称

Question

我需要从我的路由中获取控制器名称，如果在WebApiConfig中使用标准路由代码，则可以这样做。

但是，如果我使用路由属性，它将开始变得有些困难，尤其是在尝试版本控制时。

示例：如果我调用一个api / terms / bonuses，并且我有一个BonusController和BonusV2Controller以及一个BonusV3Controller，那么这段代码将返回最新的控制器版本3。没关系，我可以接受它返回默认的最新和最大版本。 。

var attributedRoutesData = request.GetRouteData().GetSubRoutes();
var subRouteData = attributedRoutesData.FirstOrDefault();

var actions = (ReflectedHttpActionDescriptor[])subRouteData.Route.DataTokens["actions"];
//This seems to get latest controller name. ie. V2
controllerName = actions[0].ControllerDescriptor.ControllerName;

现在，如果我请求版本1，为简单起见，我将使用查询字符串并调用api / terms / bonuses？v = 2

因此，此代码不再有效（显然）。

如何获得V2控制器名称？

如果我放弃路由属性，而仅使用WebApiConfig路由，则此代码会很愉快。

HttpControllerDescriptor controllerDescriptor = null; 
var controllers = GetControllerMapping();
var routeData = request.GetRouteData();
var controllerName = (string)routeData.Values["controller"];

更新：

这是我的完整选择器代码。

IDictionary<string, HttpControllerDescriptor> controllers = GetControllerMapping();                                             

var attributedRoutesData = request.GetRouteData().GetSubRoutes();
var subRouteData = attributedRoutesData.LastOrDefault(); //LastOrDefault() will get PeopleController, FirstOrDefault will get People{version}Controller which we don't want

var actions = (ReflectedHttpActionDescriptor[])subRouteData.Route.DataTokens["actions"];
var controllerName = actions[0].ControllerDescriptor.ControllerName;


//For controller name without attribute routing
//var controllerName = (string)routeData.Values["controller"];

HttpControllerDescriptor oldControllerDescriptor;
if (controllers.TryGetValue(controllerName, out oldControllerDescriptor))
{
    //TODO: Different techniques for handling version api requests.
    var apiVersion = GetVersionFromQueryString(request);
    //var version = GetVersionFromHeader(request);
    //var version = GetVersionFromAcceptHeaderVersion(request);
    //var version = GetVersionFromMediaType(request);

    if (!String.IsNullOrEmpty(apiVersion))
    {
        var newControllerName = String.Concat(controllerName, "V", apiVersion);

        HttpControllerDescriptor newControllerDescriptor;
        if (controllers.TryGetValue(newControllerName, out newControllerDescriptor))
        {
            return newControllerDescriptor;
            }
        }
        return oldControllerDescriptor;
    }
    return null;

Answer 1

 var subRouteData = request.GetRouteData().GetSubRoutes().LastOrDefault();

 if (subRouteData != null && subRouteData.Route != null)
 {
  var actions = subRouteData.Route.DataTokens["actions"] as HttpActionDescriptor[];

  if (actions != null && actions.Length > 0)
  {
     controllerName = actions[0].ControllerDescriptor.ControllerName;
  }
}