尝试将依赖注入与 CreatePerOwinContext 一起使用时出现 ObjectDisposedException答案

【问题标题】：ObjectDisposedException when trying to use Dependency Injection with CreatePerOwinContext尝试将依赖注入与 CreatePerOwinContext 一起使用时出现 ObjectDisposedException
【发布时间】：2017-05-14 00:22:06
【问题描述】：

我正在尝试将 DI 与 OWIN CreatePerOwinContext 扩展一起使用。我也在使用OAuthAuthorizationServerProvider。在 OAuthAuthorizationServerProvider 中，我尝试使用以下方法获取用户管理器的实例：OAuthGrantResourceOwnerCredentialsContext.OwinContext.GetUserManager。

启动文件：

public void Configuration(IAppBuilder app)
        {
            DataProtectionProvider = app.GetDataProtectionProvider();
            var config = new HttpConfiguration {DependencyResolver = new UnityDependencyResolver(UnityRegistrations.GetConfiguredContainer())};
            WebApiConfig.Register(config);

            //Allow Cross Domain Calls
            app.UseCors(CorsOptions.AllowAll);



            //I verified that my AppUserManager is getting constructed properly
            //var manager = UnityRegistrations.GetConfiguredContainer().Resolve<AppUserManager>();

            app.CreatePerOwinContext(() => UnityRegistrations.GetConfiguredContainer().Resolve<AppUserManager>());


            OAuthOptions = new OAuthAuthorizationServerOptions
            {
                // Point at which the Bearer token middleware will be mounted
                TokenEndpointPath = new PathString("/token"),
                // An implementation of the OAuthAuthorizationServerProvider which the middleware
                // will use for determining whether a user should be authenticated or not
                Provider = new OAuthProvider("self"),
                // How long a bearer token should be valid for
                AccessTokenExpireTimeSpan = TimeSpan.FromHours(24),
                // Allows authentication over HTTP instead of forcing HTTPS
                AllowInsecureHttp = true
            };

            app.UseOAuthBearerTokens(OAuthOptions); 
            app.UseWebApi(config);
        }

这是GetConfiguredContainer 方法：

private static readonly Lazy<IUnityContainer> Container = new 

    public static IUnityContainer GetConfiguredContainer()
    {
         return Container.Value;
    }

    Lazy<IUnityContainer>(() => {
                var container = new UnityContainer();

                //Registers the Types
                Register(container);

                return container;
            });

在我的OAuthAuthorizationServerProvider 实现的GrantResourceOwnerCredentials 中，我尝试获取AppUserManager 的实例：

public override async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
        {
            //Inspecting the _userManager I see the ObjectDisposedException
             _userManager = context.OwinContext.GetUserManager<AppUserManager>();


            var user = await _userManager.FindByNameAsync(context.UserName);
        }

我正在尝试使用 Web API 和 Owin 来实现吗？

【问题讨论】：

标签： asp.net-web-api owin unity-container

【解决方案1】：

我犯了一个菜鸟错误。出于某种原因，在我的 AppUserManager Unity 注册中，我添加了一个 HierarchicalLifetimeManager。这显然是一个错误。它过早地处置。我的 DbContext 在其注册时也有一个HierarchicalLifetimeManager。欢乐时光！

错误

_unityContainer.RegisterType<AppUserManager>(new HierarchicalLifetimeManager());

正确

_unityContainer.RegisterType<AppUserManager>();

【讨论】：