当前类型IUserStore<ApplicationUser>和DbConnection分别是接口和抽象class，无法构造

Question

如果我上网 http://localhost:58472/Account/Register 我有这个例外

System.InvalidOperationException: The current type, IUserStore<ApplicationUser>, is an interface and cannot be constructed. Are you missing a type mapping?

这是我的代码：

public class ApplicationUserManager : UserManager<ApplicationUser>
{
    public ApplicationUserManager(IUserStore<ApplicationUser> store)
        : base(store)
    { }

    public static ApplicationUserManager Create(
        IdentityFactoryOptions<ApplicationUserManager> options, 
        IOwinContext context) 
    {
        var manager = new ApplicationUserManager(
            new UserStore<ApplicationUser>(context.Get<ApplicationDbContext>())
        );

        // other code
        return manager;   
    }
}

这是控制器中的代码：

[Authorize]
public class AccountController : Controller
{
    private ApplicationSignInManager _signInManager;
    private ApplicationUserManager _userManager;

    public AccountController()
    {
    }

    public AccountController(
        ApplicationUserManager userManager,
        ApplicationSignInManager signInManager)
    {
        UserManager = userManager;
        SignInManager = signInManager;
    }

    public ApplicationSignInManager SignInManager
    {
        get
        {
            return _signInManager ?? 
                HttpContext.GetOwinContext().Get<ApplicationSignInManager>();
        }
        private set
        {
            _signInManager = value;
        }
    }

    public ApplicationUserManager UserManager
    {
        get
        {
            return _userManager ?? 
                HttpContext.GetOwinContext().GetUserManager<ApplicationUserManager>();
        }
        private set
        {
            _userManager = value;
        }
    }

    [HttpGet]
    [AllowAnonymous]
    public ActionResult Login(string returnUrl)
    {
        ViewBag.ReturnUrl = returnUrl;
        return View();
    }
}

所以你看了我的代码就知道了，我在新建MVC项目的时候没有对原来的代码做任何改动，但是出现了上面的错误。我做错了什么？

我很好地制作了一个名为 ProfileController 的新控制器，其代码与我的第二个代码块中的代码相同，但没有 ApplicationSignInManager，因为我不需要那个。

我还使用 Unity 容器来注册和管理服务。这是代码：

public static class UnityConfig
{
    public static void RegisterComponents()
    {
        var container = new UnityContainer();

        container.RegisterType<IGenericRepo<Category>, GenericRepo<Category>>();
        container.RegisterType<ICategoryService, CategoryService>();
        //container.RegisterType<IUser, ApplicationUser>(); 

        DependencyResolver.SetResolver(new UnityDependencyResolver(container));
    }
}

如果我取消注释上面代码中的行，那么当我运行站点时没有任何区别。

更新：

根据@Jay 的评论，我在 Unity 管理器中添加了这段代码。

container.RegisterType<IUserStore<ApplicationUser>, UserStore<ApplicationUser>>();

现在我遇到了这个异常：

System.InvalidOperationException: The current type, System.Data.Common.DbConnection, is an abstract class and cannot be constructed. Are you missing a type mapping?

这是堆栈跟踪中的一些信息：

InvalidOperationException

An error occurred when trying to create a controller of type AccountController. Make sure that the controller has a parameterless public constructor.

是的，我有一个无参数的 public 构造函数。
ResolutionFailedException

Resolution of the dependency failed, type = "AccountController", name = "(none)".

所以我在 Unity 管理器中添加了这一行：

container.RegisterType<IDbConnection, DbConnection>();

但我仍然有同样的异常。

The current type, System.Data.Common.DbConnection...

更新：

根据@RandyLevy 的评论，我试过了，帮助解决了这个问题 Configure Unity DI for ASP.NET Identity:

将此添加到 AccountController:

// two fields added
private readonly UserManager<ApplicationUser> _userManager;
private readonly RoleManager<IdentityRole> _roleManager;

// constructor added
public AccountController(
    IUserStore<ApplicationUser> userStore, 
    IRoleStore<IdentityRole> roleStore, 
    ApplicationSignInManager signInManager)
{
    _userManager = new UserManager<ApplicationUser>(userStore);
    _roleManager = new RoleManager<IdentityRole>(roleStore);
    SignInManager = signInManager; // I need this
}

public ApplicationSignInManager SignInManager // I need this
{
    get
    {
        return _signInManager ?? 
            HttpContext.GetOwinContext().Get<ApplicationSignInManager>();
    }
    private set
    {
        _signInManager = value;
    }
}

public UserManager<ApplicationUser> UserManager // replace by other property 
                                                // type of ApplicationUserManager 
{
    get
    {
        return _userManager ?? 
            HttpContext.GetOwinContext().GetUserManager<ApplicationUserManager>();
    }
    //private set // comment this because _usermanager is readonly.
    //{
    //    _userManager = value;
    //}
}

//public ApplicationUserManager UserManager // replaced by the property type of 
//                                          // UserManager<ApplicationUser>
//{
//    get
//    {
//        return _userManager ?? 
//            HttpContext.GetOwinContext().GetUserManager<ApplicationUserManager>();
//    }
//    private set
//    {
//        _userManager = value;
//    }
//}

将其添加到 UnityManager 中：

InjectionConstructor accountInjectionConstructor = 
    new InjectionConstructor(new ApplicationDbContext());

container.RegisterType<AccountController>();
container.RegisterType<IController, Controller>();

container.RegisterType
    <IRoleStore<IdentityRole>, RoleStore<IdentityRole>>
    (accountInjectionConstructor); // on this line

container.RegisterType
    <IUserStore<ApplicationUser>, UserStore<ApplicationUser>>
    (accountInjectionConstructor);

但是我在评论的行上遇到了这个错误（没有运行时间异常）：

The type RoleStore<IdentityRole> cannot be used as type parameter TTo in the generic type or method below:
UnityContainerExtensions.RegisterType<TFrom, TTo>
    (IUnityContainer, params InjectionMember[])
There is no implicit reference conversion from RoleStore<IdentityRole> to IRoleStore<IdentityRole>.

Answer 1

我终于找到了解决问题的方法。我已将此代码添加到 Unity 管理器中。

container.RegisterType<DbContext, ApplicationDbContext>(new HierarchicalLifetimeManager());
container.RegisterType<UserManager<ApplicationUser>>(new HierarchicalLifetimeManager());
container.RegisterType<IUserStore<ApplicationUser>, UserStore<ApplicationUser>>(new HierarchicalLifetimeManager());
container.RegisterType<AccountController>(new InjectionConstructor());

Answer 2

更新 H. Pauwelyn 的回答。最初的问题是 Unity 试图用两个参数调用构造函数。

public AccountController(
    ApplicationUserManager userManager,
    ApplicationSignInManager signInManager)
{
    UserManager = userManager;
    SignInManager = signInManager;
}

下一行将告诉 Unity 改为调用无参数构造函数，不需要任何其他内容。这对我有用。

container.RegisterType<AccountController>(new InjectionConstructor());

Answer 3

或者，可以使用 [ApplicationUserManager userManager,ApplicationSignInManager signInManager] 从 AccountController 中删除构造函数，只留下一个无参数的构造函数（或一个具有统一解析依赖项的构造函数），因为 UserManager 和 SignInManager 在调用时都会自行解析...

当前类型IUserStore<ApplicationUser>和DbConnection分别是接口和抽象class，无法构造

The current types, IUserStore<ApplicationUser> and DbConnection, are respectively an interface and abstract class and cannot be constructed

c#

asp.net-mvc

user-management

unity-container

invalidoperationexception