Visual Studio 2013을 설치했으며 앱을 실행할 때 아래 오류가 발생합니다.

이 객체를 어디에서 초기화해야하는지 전혀 모른다.

무엇을해야합니까?

    Server Error in '/' Application.

The object has not yet been initialized. Ensure that HttpConfiguration.EnsureInitialized() is called in the application's startup code after all other initialization code.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: The object has not yet been initialized. Ensure that HttpConfiguration.EnsureInitialized() is called in the application's startup code after all other initialization code.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[InvalidOperationException: The object has not yet been initialized. Ensure that HttpConfiguration.EnsureInitialized() is called in the application's startup code after all other initialization code.]
   System.Web.Http.Routing.RouteCollectionRoute.get_SubRoutes() +101
   System.Web.Http.Routing.RouteCollectionRoute.GetRouteData(String virtualPathRoot, HttpRequestMessage request) +63
   System.Web.Http.WebHost.Routing.HttpWebRoute.GetRouteData(HttpContextBase httpContext) +107
   System.Web.Routing.RouteCollection.GetRouteData(HttpContextBase httpContext) +233
   System.Web.Routing.UrlRoutingModule.PostResolveRequestCache(HttpContextBase context) +60
   System.Web.Routing.UrlRoutingModule.OnApplicationPostResolveRequestCache(Object sender, EventArgs e) +82
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +136
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +69

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.18408

이것은 AlumCloud입니다

답변

GlobalConfiguration.Configuration.EnsureInitialized(); 

WebApiConfig.Register(GlobalConfiguration.Configuration);

GlobalConfiguration.Configure(WebApiConfig.Register);

GlobalConfiguration.Configure(config =>
{
    WebApiConfig.Register(config);
    config.MapAttributeRoutes();
    ...
});

public Action<HttpConfiguration> Initializer;

public void EnsureInitialized()
{
    if (_initialized)
    {
        return;
    }
    _initialized = true;
    Initializer(this);
}

public static void MapAttributeRoutes(...)
{
    RouteCollectionRoute aggregateRoute = new RouteCollectionRoute();
    configuration.Routes.Add(AttributeRouteName, aggregateRoute);

    ...

    Action<HttpConfiguration> previousInitializer = configuration.Initializer;
    configuration.Initializer = config =>
    {
        previousInitializer(config);
        ...
    };
}

public static void Configure(Action<HttpConfiguration> configurationCallback)
{
    if (configurationCallback == null)
    {
        throw new ArgumentNullException("configurationCallback");
    }

    configurationCallback.Invoke(Configuration);
    Configuration.EnsureInitialized();
}

[Route("my-route?field={field}")]
public void MyRoute([FromUri] string field)
{
}

[Route("my-route")]
public void MyRoute([FromUri] string field)
{
}

[Route("/api/abc/{client}")] 

[Route("api/abc/{client}")]