Breeze.js WebApi 2 启动问题答案

【问题标题】：Breeze.js WebApi 2 Startup IssueBreeze.js WebApi 2 启动问题
【发布时间】：2015-03-30 09:24:59
【问题描述】：

我正在尝试使用微风.js 服务器端 asp.net web api 2 进行基本设置。我有微风路由设置和微风注释的 web api 控制器。调用元数据操作（或与此相关的任何操作）会在下面抛出此错误。据我所知，这与延迟加载我的实体上的导航属性无关。

这个错误似乎是微风数据结构内部的惰性类型？我引用的是 Breeze.WebApi2 和 Breeze.ContextProvider v1.4，以及 Breeze.ContextProvider.EF6

根据微风文档，我已在我的数据库上下文中明确禁用延迟加载。 dbContext.Configuration.LazyLoadingEnabled = false;
dbContext.Configuration.ProxyCreationEnabled = false;

谢谢。

   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.Lazy`1.get_Value()
   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)\r\n   at System.Web.Http.Routing.AttributeRoutingMapper.<>c__DisplayClass2.<MapAttributeRoutes>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.Controllers.HttpControllerDescriptor.Initialize()
   at System.Web.Http.Controllers.HttpControllerDescriptor..ctor(HttpConfiguration configuration, String controllerName, Type controllerType)
   at System.Web.Http.Dispatcher.DefaultHttpControllerSelector.InitializeControllerInfoCache()\r\n   at System.Lazy`1.CreateValue()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Lazy`1.get_Value()
   at System.Web.Http.Dispatcher.DefaultHttpControllerSelector.SelectController(HttpRequestMessage request)
   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()"}

【问题讨论】：

标签： asp.net-web-api breeze

【解决方案1】：

事实证明，这与注册路线的顺序有关。我删除了 Breeze nuget 安装添加的 webactivor.PreApplicationStartMethod() 程序集指令，并在配置并开始工作的标准 web api 路由之后手动调用到 Global.asax 中的 Breeze 路由配置中。之前设置似乎会导致问题。

【讨论】：