异常-asp.net core 3.1 部分服务无法构建

Question

尝试通过向 IdentityUser 添加字段并覆盖 SignInManager 中的方法并在项目启动中获取此异常来自定义 asp.net core 3.1 身份

System.AggregateException
  HResult=0x80131500
  Message=Some services are not able to be constructed (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.IUserClaimsPrincipalFactory`1[id1.AxUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.UserClaimsPrincipalFactory`1[id1.AxUser]': Unable to resolve service for type 'id1.AxUserStore' while attempting to activate 'id1.AxUserManager'.)
..
..

我认为拨打电话的顺序可能搞砸了，但试图移动它们并没有帮助，这就是它的样子

public void ConfigureServices(IServiceCollection services)
        {

            services.AddDbContext<AxDbContext>(options =>
                options.UseSqlServer(
                    Configuration.GetConnectionString("DefaultConnection")));

            services.AddDefaultIdentity<AxUser>(options => { options.SignIn.RequireConfirmedAccount = true; options.User.RequireUniqueEmail = false; })
                .AddEntityFrameworkStores<AxDbContext>()
                .AddUserStore<AxUserStore>()
                .AddUserManager<AxUserManager>()
                .AddDefaultTokenProviders()
                .AddSignInManager<AxSignInManager>()
                ;
                //.AddClaimsPrincipalFactory<AxUserClaimsPrincipalFactory>()

其他代码是

public class AxUser : IdentityUser    { // complete class
        [PersonalData]public int SiteID { get; set; }
    }

public class AxDbContext : IdentityDbContext<AxUser>    { // complete class
        public AxDbContext(DbContextOptions<AxDbContext> options): base(options){}
    }

public class AxUserStore : UserStore<AxUser>{
        public AxUserStore(AxDbContext ctx, IdentityErrorDescriber errorDescriber) :base(ctx, errorDescriber) {}
          ....         //other methods
  }

  public class AxUserManager : UserManager<AxUser>    { // complete class !
        public AxUserManager(AxUserStore store, IOptions<IdentityOptions> optionsAccessor,
            IPasswordHasher<AxUser> passwordHasher, IEnumerable<IUserValidator<AxUser>> userValidators,
            IEnumerable<IPasswordValidator<AxUser>> passwordValidators, ILookupNormalizer keyNormalizer,
            IdentityErrorDescriber errors, IServiceProvider services, ILogger<UserManager<AxUser>> logger)
            : base(store, optionsAccessor, passwordHasher, userValidators, passwordValidators, keyNormalizer, errors, services, logger){ }
    }

// complete class
    public class AxUserClaimsPrincipalFactory : UserClaimsPrincipalFactory<AxUser, IdentityRole>   {
        public AxUserClaimsPrincipalFactory(AxUserManager userManager, 
            RoleManager<IdentityRole> roleManager,
            IOptions<IdentityOptions> optionsAccessor) 
            : base(userManager, roleManager, optionsAccessor)        {        }
    }

public class AxSignInManager : SignInManager<AxUser>{
        public AxSignInManager(UserManager<AxUser> userManager, IHttpContextAccessor contextAccessor, UserClaimsPrincipalFactory<AxUser> claimsFactory, IOptions<IdentityOptions> optionsAccessor, 
            ILogger<AxSignInManager> logger, IAuthenticationSchemeProvider schemes, IUserConfirmation<AxUser> confirmation)
            :base(userManager, contextAccessor, claimsFactory, optionsAccessor, logger, schemes, confirmation) { }

    }
         

我只需要覆盖 UserStore 和 SignInManager 中的几个方法，其余的类都是在我试图让它在启动时不崩溃时创建的！

感谢任何帮助

Answer 1

不确定您的其他代码是什么，只需使用您给定的代码进行如下更改即可。那么应用运行时就不会抛出异常：

services.AddDbContext<AxDbContext>(options =>
options.UseSqlServer(
    Configuration.GetConnectionString("DefaultConnection")));

services.AddIdentity<AxUser,IdentityRole>(options => { options.SignIn.RequireConfirmedAccount = true; options.User.RequireUniqueEmail = false; })
    .AddEntityFrameworkStores<AxDbContext>()             
    .AddDefaultTokenProviders();

services.AddScoped<AxUserStore>();
services.AddScoped<AxUserManager>();
services.AddScoped<AxSignInManager>();
services.AddScoped<AxUserClaimsPrincipalFactory>();
services.AddScoped<UserClaimsPrincipalFactory<AxUser>>();

详细解释你可以查看下面的答案：

DI 通常用于接口驱动的开发； .AddUserManager() 指定实现 UserManager，而不是服务接口。这意味着它仍然希望您获得 UserManager 并仅以这种方式使用它；它会给你一个 ApplicationUserManager。

https://stackoverflow.com/a/30457561/11398810