无法创建 Identity 类 的对象(UserManager 和 RoleManager)

Can not create objects of Identity classes (UserManager and RoleManager)

我正在开发一个 3 层架构应用程序,因此我在数据访问层将 UserManager 和 RoleManager 添加到我的 UnitOfWork。 但是当我尝试创建 UserManager 和 RoleManager classes 的对象时,我得到了这个错误:

There is no argument given that corresponds to the required formal parameter 'optionsAccessor' 
of 'UserManager<IdentityUser>.UserManager(IUserStore<IdentityUser>, IOptions<IdentityOptions>, 
IPasswordHasher<IdentityUser>, IEnumerable<IUserValidator<IdentityUser>>, 
IEnumerable<IPasswordValidator<IdentityUser>>, ILookupNormalizer, IdentityErrorDescriber, 
IServiceProvider, ILogger<UserManager<IdentityUser>>)'

There is no argument given that corresponds to the required formal parameter 'roleValidators'
 of 'RoleManager<IdentityRole>.RoleManager(IRoleStore<IdentityRole>, IEnumerable<IRoleValidator<IdentityRole>>, 
ILookupNormalizer, IdentityErrorDescriber, ILogger<RoleManager<IdentityRole>>)'

我的 UnitOfWork 的一部分 class

    public class IdentityUnitOfWork : IUnitOfWork
    {
        private UserManager<IdentityUser> _userManager;
        private RoleManager<IdentityRole> _roleManager;
        private ApplicationContext _context;

        public IdentityUnitOfWork(ApplicationContext context)
        {
            _userManager = new UserManager<IdentityUser>(context);// error 1
            _roleManager = new RoleManager<IdentityRole>(context);// error 2
            _context = context;
        }
    }

更新

当我尝试创建自己的 RoleManagerUserManager class 时,我遇到了同样的错误。

我的ApplicationRoleclass

    public class ApplicationRole : IdentityRole
    {

    }

我的ApplicationRoleManagerclass

    public class ApplicationRoleManager : RoleManager<ApplicationRole>
    {
        public ApplicationRoleManager(RoleStore<ApplicationRole> store)
                    : base(store)// error in a here (in a base)
        {

        }
    }

您已将身份服务添加到 IoC 容器。所以你可以像这样在 UnitOfWork 的构造函数中使用依赖注入:

public class IdentityUnitOfWork : IUnitOfWork
{
    private UserManager<IdentityUser> _userManager;
    private RoleManager<IdentityRole> _roleManager;
    private ApplicationContext _context;

    public IdentityUnitOfWork(ApplicationContext context, 
        UserManager<IdentityUser> userManager,
        RoleManager<IdentityRole> roleManager)
    {
        _userManager = userManager;
        _roleManager = roleManager;
        _context = context;
    }
}