Question

我正在尝试将Autofac配置为与我的Web API / Oauth Identity项目配合使用，但它似乎不起作用。我一直得到'无法在构造函数上解析参数ApplicationUserManager ....'

这是未实例化的服务：

public class EmployeeService : Service<Employee>, IEmployeeService
{
    private readonly ApplicationUserManager _userManager;

    public EmployeeService(IUnitOfWork uow, ApplicationUserManager userManager)
        : base(uow)
    {
        _userManager = userManager;
    }

    // .. other code
}

ApplicationUserManager：

public class ApplicationUserManager : UserManager<Employee>
{
    public ApplicationUserManager(IUserStore<Employee> store, IdentityFactoryOptions<ApplicationUserManager> options)
        : base(store)
    {
        this.EmailService = new EmailService();

        var dataProtectionProvider = options.DataProtectionProvider;
        if (dataProtectionProvider != null)
        {
            this.UserTokenProvider = new DataProtectorTokenProvider<Employee>(dataProtectionProvider.Create("ASP.NET Identity"))
            {
                //Code for email confirmation and reset password life time
                TokenLifespan = TimeSpan.FromHours(6)
            };
        }

        // UserValidator and PasswordValidator
        // ...
    }
}

autofac配置：

public static void RegisterAutofac()
{
    var builder = new ContainerBuilder();

    builder.RegisterApiControllers(Assembly.GetExecutingAssembly());

    builder.RegisterAssemblyTypes(typeof(IRepository<>).Assembly).AsClosedTypesOf(typeof(IRepository<>));

    builder.RegisterAssemblyTypes(AppDomain.CurrentDomain.GetAssemblies())
        .Where(t => t.Name.EndsWith("Service"))
        .AsImplementedInterfaces();

    // Tried, doesn't work:
    //builder.RegisterType<MyContext>();
    //builder.RegisterType<UserStore<Employee>>().AsImplementedInterfaces();
    //builder.RegisterType<ApplicationUserManager>().As<UserManager<Employee>>();

    // Also doesn't work:
    builder.RegisterInstance(new MyContext());
    builder.RegisterType<UserStore<Employee>>().AsImplementedInterfaces().InstancePerRequest();
    builder.Register<IdentityFactoryOptions<ApplicationUserManager>>(c => 
        new IdentityFactoryOptions<ApplicationUserManager>()
        {
            DataProtectionProvider = new Microsoft.Owin.Security.DataProtection.DpapiDataProtectionProvider("ApplicationN‌ame")
        }); 
    builder.RegisterType<ApplicationUserManager>().As<UserManager<Employee>>().InstancePerRequest();

    builder.RegisterType<UnitOfWork>().As<IUnitOfWork>();

    var container = builder.Build();

    DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
    var resolver = new AutofacWebApiDependencyResolver(container);
    GlobalConfiguration.Configuration.DependencyResolver = resolver;
}

以下确实有效，但不使用DI：

public class EmployeeService : Service<Employee>, IEmployeeService
{
    private readonly ApplicationUserManager _userManager;

    public EmployeeService(IUnitOfWork uow)
        : base(uow)
    {
        var store = new UserStore<Employee>(Uow.GetDbContext());
        _userManager = new ApplicationUserManager(store);
    }
}

任何人都知道我做错了什么？

（如果需要更多信息，可以提供更多代码）

修改

异常消息＆amp;堆栈跟踪：

exceptionMessage：“找不到任何构造函数类型上的'Autofac.Core.Activators.Reflection.DefaultConstructorFinder' 可以使用。调用'AngularMVC.Services.EmployeeService' 可用的服务和参数：无法解析参数 'AngularMVC.DAL.ApplicationUserManager userManager'的构造函数 'Void .ctor（AngularMVC.DAL.IUnitOfWork， AngularMVC.DAL.ApplicationUserManager）'。“exceptionType： “Autofac.Core.DependencyResolutionException”stackTrace：“at Autofac.Core.Activators.Reflection.ReflectionActivator.ActivateInstance（IComponentContext 上下文，IEnumerable 1 parameters) at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable 1 参数）在Autofac.Core.Resolving.InstanceLookup.Execute（）at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance（ISharingLifetimeScope currentOperationScope，IComponentRegistration注册， IEnumerable 1 parameters) at Autofac.Core.Resolving.InstanceLookup.ResolveComponent(IComponentRegistration registration, IEnumerable 1个参数）at Autofac.Core.Activators.Reflection.AutowiringParameter＆LT;＆GT; c__DisplayClass2.b__0（）在 Autofac.Core.Activators.Reflection.ConstructorParameterBinding.Instantiate（）在 Autofac.Core.Activators.Reflection.ReflectionActivator.ActivateInstance（IComponentContext 上下文，IEnumerable 1 parameters) at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable 1 参数）在Autofac.Core.Resolving.InstanceLookup.Execute（）at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance（ISharingLifetimeScope currentOperationScope，IComponentRegistration注册， IEnumerable 1 parameters) at Autofac.Core.Resolving.ResolveOperation.ResolveComponent(IComponentRegistration registration, IEnumerable 1个参数）at Autofac.Core.Resolving.ResolveOperation.Execute（IComponentRegistration 注册，IEnumerable 1 parameters) at Autofac.Core.Lifetime.LifetimeScope.ResolveComponent(IComponentRegistration registration, IEnumerable 1参数）at Autofac.ResolutionExtensions.TryResolveService（IComponentContext 上下文，服务服务，IEnumerable 1 parameters, Object& instance) at Autofac.ResolutionExtensions.ResolveOptionalService(IComponentContext context, Service service, IEnumerable 1个参数）at Autofac.ResolutionExtensions.ResolveOptional（IComponentContext context，类型serviceType，IEnumerable 1 parameters) at Autofac.ResolutionExtensions.ResolveOptional(IComponentContext context, Type serviceType) at Autofac.Integration.WebApi.AutofacWebApiDependencyScope.GetService(Type serviceType) at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.GetInstanceOrActivator(HttpRequestMessage request, Type controllerType, Func 1＆amp;激活者） System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create（HttpRequestMessage 请求，HttpControllerDescriptor controllerDescriptor，Type controllerType）“

Answer 1

这就是我在Autofac中注册ApplicationUserManager的方法，它适用于我的所有应用程序。

builder.Register(c => HttpContext.Current.GetOwinContext().GetUserManager).As<ApplicationUserManager>();

这将告诉Autofac，当我要求ApplicationUserManager时，请从我的Current HttpContext中的OwinContext获取UserManager。

这将从类中获取OwinContext和HttpContext的逻辑和依赖性，并使代码更好地使用。

您也可以对IAuthenticationManager执行相同的操作，也可以使用

删除您的OwinContext依赖项

builder.Register(c => HttpContext.Current.GetOwinContext().Authentication).As<IAuthenticationManager>();

Autofac无法解析参数ApplicationUserManager

1 个答案: