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[英]Web Api 2 API not recognizing Multiple Attributes for Routing (Versioning)
[英]How to get controller name when Web API versioning with routing attributes
我需要從我的路由中獲取控制器名稱,如果在 WebApiConfig 中使用標准路由代碼,我可以這樣做。
但是,如果我使用路由屬性,它開始變得有點困難,尤其是在嘗試版本時。
示例:如果我調用 api/terms/bonuses 並且我有一個 BonusController 和 BonusV2Controller 以及一個 BonusV3Controller,則此代碼返回最新的控制器版本 3。沒關系,我可以接受返回最新和最好的版本作為默認值。
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;
現在,如果我請求版本 1,為簡單起見,我將使用查詢字符串並調用 api/terms/bonuses?v=2
所以這段代碼不再有效(顯然)。
如何獲得 V2 控制器名稱?
如果我放棄路由屬性而只使用 WebApiConfig 路由,則此代碼運行良好。
HttpControllerDescriptor controllerDescriptor = null;
var controllers = GetControllerMapping();
var routeData = request.GetRouteData();
var controllerName = (string)routeData.Values["controller"];
更新:
這是我的完整選擇器代碼。
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;
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;
}
}
最后我找到了:
filterContext.ActionContext.ControllerContext.ControllerDescriptor.ControllerName
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