使用依賴注入HttpContext會話爲空

Question

使用OWIN和AutoFac作爲IoC容器，我試圖使用依賴注入將HttpContext注入會話狀態存儲機制，但HttpContext.Session爲null。另外，我不確定它是否重要，但是我試圖將HttpContextWrapper（HttpContext.Current）注入到的類是作爲nuget包構建的外部dll。

Autofac註冊，註冊我的Autofac模塊

public static void Register(IAppBuilder app) 
    { 
      var builder = new ContainerBuilder(); 
      builder.RegisterControllers(Assembly.GetExecutingAssembly()); 
      builder.RegisterModelBinderProvider(); 
      builder.RegisterFilterProvider(); 

      builder.RegisterModule(new GatewayModule()); 

      var container = builder.Build(); 
      DependencyResolver.SetResolver(new AutofacDependencyResolver(container)); 
      app.UseAutofacMiddleware(container); 
    } 

而對於autofac模塊的代碼：

public class GatewayModule : Module 
{ 
    protected override void Load(ContainerBuilder builder) 
    { 
     builder.RegisterType<SessionStateTokenStore>() 
      .WithParameter(new TypedParameter(typeof(HttpContextBase), new HttpContextWrapper(HttpContext.Current))) 
      .As<ITokenStore>().InstancePerRequest(); 
    } 
} 

然而，當我看着我的SessionStateTokenStore，_httpContext.Session爲空。這裏是我的調試器中的觀察窗口的圖像。 HttpContext.Session is null

爲什麼HttpContext.Session爲空，我該如何解決它？

Answer 1

你可以讓Autofac解析HttpContextBase，並且看到它解決了這個問題嗎？

// HttpContext 
builder.Register(c => new HttpContextWrapper(HttpContext.Current) as HttpContextBase) 
    .As<HttpContextBase>().InstancePerLifetimeScope(); 
builder.Register(c => c.Resolve<HttpContextBase>().Request) 
    .As<HttpRequestBase>().InstancePerLifetimeScope(); 
builder.Register(c => c.Resolve<HttpContextBase>().Response) 
    .As<HttpResponseBase>().InstancePerLifetimeScope(); 
builder.Register(c => c.Resolve<HttpContextBase>().Server) 
    .As<HttpServerUtilityBase>().InstancePerLifetimeScope(); 
builder.Register(c => c.Resolve<HttpContextBase>().Session) 
    .As<HttpSessionStateBase>().InstancePerLifetimeScope(); 

builder.RegisterType<SessionStateTokenStore>() 
    .As<ITokenStore>().InstancePerRequest();