升級到sitecore後WEB API調用出現500錯誤8

Question

最近，我們從Sitecore 7.5升級到Sitecore 8.0。升級後，自定義Web API調用開始返回與下面的異常500個錯誤代碼：

Message:"An error has occurred." 
ExceptionMessage:"ValueFactory attempted to access the Value property of this instance." 
ExceptionType:"System.InvalidOperationException" 
StackTrace:" at System.Lazy`1.CreateValue() 
    at System.Lazy`1.LazyInitValue() 
    at System.Web.Http.Dispatcher.DefaultHttpControllerSelector.GetControllerMapping() 
    at System.Web.Http.Routing.AttributeRoutingMapper.AddRouteEntries(SubRouteCollection collector, HttpConfiguration configuration, IInlineConstraintResolver constraintResolver, IDirectRouteProvider directRouteProvider) 
    at System.Web.Http.Routing.AttributeRoutingMapper.<>c__DisplayClass2.<>c__DisplayClass4.<MapAttributeRoutes>b__1() 
    at System.Web.Http.Routing.RouteCollectionRoute.EnsureInitialized(Func`1 initializer) 
    at System.Web.Http.Routing.AttributeRoutingMapper.<>c__DisplayClass2.<MapAttributeRoutes>b__0(HttpConfiguration config) 
    at System.Web.Http.CorsHttpConfigurationExtensions.<>c__DisplayClass3.<AddCorsMessageHandler>b__0(HttpConfiguration config) 
    at System.Web.Http.HttpConfiguration.ApplyControllerSettings(HttpControllerSettings settings, HttpConfiguration configuration) 
    at System.Web.Http.Controllers.HttpControllerDescriptor.InvokeAttributesOnControllerType(HttpControllerDescriptor controllerDescriptor, Type type) 
    at System.Web.Http.Dispatcher.DefaultHttpControllerSelector.InitializeControllerInfoCache() 
    at System.Lazy`1.CreateValue() 
    at System.Lazy`1.LazyInitValue() 
    at System.Web.Http.Dispatcher.DefaultHttpControllerSelector.GetControllerMapping() 
    at System.Web.Http.Routing.AttributeRoutingMapper.AddRouteEntries(SubRouteCollection collector, HttpConfiguration configuration, IInlineConstraintResolver constraintResolver, IDirectRouteProvider directRouteProvider) 
    at System.Web.Http.Routing.AttributeRoutingMapper.<>c__DisplayClass2.<>c__DisplayClass4.<MapAttributeRoutes>b__1() 
    at System.Web.Http.Routing.RouteCollectionRoute.EnsureInitialized(Func`1 initializer) 
    at System.Web.Http.Routing.AttributeRoutingMapper.<>c__DisplayClass2.<MapAttributeRoutes>b__0(HttpConfiguration config) 
    at System.Web.Http.CorsHttpConfigurationExtensions.<>c__DisplayClass3.<AddCorsMessageHandler>b__0(HttpConfiguration config) 
    at System.Web.Http.HttpConfiguration.ApplyControllerSettings(HttpControllerSettings settings, HttpConfiguration configuration) 
    at System.Web.Http.Controllers.HttpControllerDescriptor.InvokeAttributesOnControllerType(HttpControllerDescriptor controllerDescriptor, Type type) 
    at Sitecore.Services.Infrastructure.Web.Http.Dispatcher.NamespaceHttpControllerSelector.InitializeControllerDictionary() 
    at System.Lazy`1.CreateValue() 
--- End of stack trace from previous location where exception was thrown --- 
    at System.Lazy`1.get_Value() 
    at Sitecore.Services.Infrastructure.Web.Http.Dispatcher.NamespaceHttpControllerSelector.SelectController(HttpRequestMessage request) 
    at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()" 

路線註冊在global.asax.cs：

protected void Application_Start(object sender, EventArgs e) 
     { 
      GlobalConfiguration.Configure(config => 
      { 
       config.MapHttpAttributeRoutes(); 

       //config.Routes.MapHttpRoute(
       // name: "DefaultApi", 
       // routeTemplate: "api/{controller}/{id}", 
       // defaults: new { id = RouteParameter.Optional } 
       //); 
      }); 
      SqlServerTypes.Utilities.LoadNativeAssemblies(Server.MapPath("~/bin")); 
     } 

Answer 1

This solution嘗試升級時爲我們工作。您應該完整閱讀該文章以瞭解其功能，但總之您需要創建一個自定義的HttpControllerSelector，並在Sitecore添加完所有路由之後將其與Sitecore交換。注意：這個摘要都不是我的。我從鏈接的文章中收集了所有這些內容。

就像旁註一樣，我強烈建議避免將Sitecore 8升級到原位。我會說，使用全新安裝的Sitecore 8然後通過軟件包遷移您的內容幾乎總是一個更好的選擇。 This blog是一個很好的看看這兩個選項。