AttributeRouting WebAPI现在产生错误

Question

我刚刚在我的AttributeRouting项目上更新(从V3.x版本)到最新版本的WebAPI，它刚刚开始产生我以前从未见过的错误。

现在，每当调用API时，我都会得到如下错误：

System.InvalidOperationException: The constraint entry 'inboundHttpMethod' on the route with route template 'my/path' must have a string value or be of a type which implements 'IHttpRouteConstraint'.
   at System.Web.Http.Routing.HttpRoute.ProcessConstraint(HttpRequestMessage request, Object constraint, String parameterName, HttpRouteValueDictionary values, HttpRouteDirection routeDirection)
   at System.Web.Http.Routing.HttpRoute.ProcessConstraints(HttpRequestMessage request, HttpRouteValueDictionary values, HttpRouteDirection routeDirection)
   at System.Web.Http.Routing.HttpRoute.GetRouteData(String virtualPathRoot, HttpRequestMessage request)
   at AttributeRouting.Web.Http.Framework.HttpAttributeRoute.GetRouteData(String virtualPathRoot, HttpRequestMessage request)
   at System.Web.Http.WebHost.Routing.HttpWebRoute.GetRouteData(HttpContextBase httpContext)
   at System.Web.Routing.RouteCollection.GetRouteData(HttpContextBase httpContext)
   at System.Web.Routing.UrlRoutingModule.PostResolveRequestCache(HttpContextBase context)
   at System.Web.Routing.UrlRoutingModule.OnApplicationPostResolveRequestCache(Object sender, EventArgs e)
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

几个月来一直没有问题。

没有文档的细节有任何使用上的变化。我的配置文件看起来是正确的。

哪里出问题了？我找不到其他人报告这件事。

Answer 1

肯定在内存托管类型问题上。最近，在更新到MVC 5之后，我遇到了同样的问题。我查看了不同的帖子，实际上找到了一个最终帮助我解决的问题。我就是这样解决这个问题的。

安装属性路由库后，必须在global.ascx文件中包含以下内容。

AttributeRoutingHttpConfig.RegisterRoutes(GlobalConfiguration.Configuration.Routes);

在AttributeRoutingHttpConfig类中，替换以下代码：

routes.MapHttpAttributeRoutes();

使用

routes.MapHttpAttributeRoutes(cfg =>
{
            cfg.InMemory = true;
            cfg.AutoGenerateRouteNames = true;
            cfg.AddRoutesFromAssemblyOf<ANY_API_Controller>();
        });

在这里，ANY_API_Controller引用了项目中的任何一个apicontroller类。