c# - Unity IOC，无法修复无参数构造函数问题

Question

我有以下构造函数(只有一个用于 Controller ):

[Authorize]
public class AccountController : Controller
{
    public AccountController(ApplicationUserManager userManager, ApplicationSignInManager signInManager,
        IAccountService accountSrv)
    {
        UserManager = userManager;
        SignInManager = signInManager;
        AccountService = accountSrv;
    }

    private IAccountService AccountService { get; }

    private ApplicationSignInManager SignInManager { get; }

    private ApplicationUserManager UserManager { get; }

我希望 MVC 使用正确的参数来调用它，所以我尝试了以下方法:
Global.asax.cs

public class MvcApplication : HttpApplication
{
    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);
        DALMapper.Mapping();
        LabMapper.Mapping();

        var container = new UnityContainer();
        container
            .RegisterType<IDALContext, DALContext>()
            .RegisterType<IConsultantService, ConsultantService>()
            .RegisterType<IProjectService, ProjectService>()
            .RegisterType<IAccountService, AccountService>()
            .RegisterType<AccountController, AccountController>()
            .RegisterType<ApplicationUserManager, ApplicationUserManager>()
            .RegisterType<ApplicationSignInManager, ApplicationSignInManager>()
            .RegisterInstance<IAccountService>(new AccountService(new DALContext()), new ContainerControlledLifetimeManager())
        ;

        DependencyResolver.SetResolver(new UnityDependencyResolver(container));

(UnityDependencyResolver 是:)

public class UnityDependencyResolver : IDependencyResolver
{
    private readonly IUnityContainer _container;

    public UnityDependencyResolver(IUnityContainer container)
    {
        _container = container;
    }

    public object GetService(Type serviceType)
    {
        try
        {
            return _container.Resolve(serviceType);
        }
        catch
        {
            return null;
        }
    }

    public IEnumerable<object> GetServices(Type serviceType)
    {
        try
        {
            return _container.ResolveAll(serviceType);
        }
        catch
        {
            return new List<object>();
        }
    }
}

我在其中注册所需的每种类型(尽管输入/来自类型相同(我对 Unity 还很陌生)，但结果感觉很奇怪)。

但是这不起作用。 (据我所知，从MV3开始，默认的 Controller 工厂将使用服务定位器，因此不需要实现自己的工厂)。

出了什么问题？

当前结果:

Server Error in '/' Application.

No parameterless constructor defined for this object.

Answer 1

如果我正确理解您的问题，则解决 ApplicationUserManager 和 ApplicationSignInManager 的依赖关系时存在问题。 这是为我解决问题的代码:

//for accountcontroller
        container.RegisterType<DbContext, ApplicationDBContext>(new HierarchicalLifetimeManager());
        container.RegisterType<UserManager<ApplicationUser>>(new HierarchicalLifetimeManager());
        container.RegisterType<IUserStore<ApplicationUser>, UserStore<ApplicationUser>>(new HierarchicalLifetimeManager());
        container.RegisterType<IAuthenticationManager>(new InjectionFactory(o => HttpContext.Current.GetOwinContext().Authentication));