AspNet Core3 身份配置

Question

我正在尝试遵循 AspNet Core 1.1 的一些过时的教程项目（同时我使用的是 Visual Studio 2019 预览版 2.0，并且安装了 .net core v3.0.0-preview9）

我已经有一个数据库，其中包含由 EntityFrameworkCore3.00-preview 创建的几个表，它工作正常。

现在我正在尝试将自动化添加到项目中所以我从 IdentityDbContext 派生了我的数据库上下文类，

public class MyDbContext : IdentityDbContext

代替

public class WorldContext : DbContext

进行添加迁移和更新数据库，在数据库中我看到许多新表

此时我的应用程序可以启动，但就在我添加一行的那一刻

services.AddIdentity<IdentityUser, IdentityRole>();

到 Startup.cs 中的 ConfigurationServices

应用程序崩溃并显示以下消息：

System.AggregateException HResult=0x80131500 消息=无法构建某些服务（验证服务描述符时出错：“ServiceType: Microsoft.AspNetCore.Identity.ISecurityStampValidator Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.SecurityStampValidator 1[Microsoft.AspNetCore.Identity.IdentityUser]': Unable to resolve service for type 'Microsoft.AspNetCore.Identity.IUserStore1[Microsoft.AspNetCore .Identity.IdentityUser]'同时尝试激活'Microsoft.AspNetCore.Identity.UserManager 1[Microsoft.AspNetCore.Identity.IdentityUser]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.ITwoFactorSecurityStampValidator Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.TwoFactorSecurityStampValidator1[Microsoft.AspNetCore.Identity.IdentityUser]'：无法解析类型'Microsoft.AspNetCore.Identity.IUserStore 1[Microsoft.AspNetCore.Identity.IdentityUser]' while attempting to activate 'Microsoft.AspNetCore.Identity.UserManager1[Microsoft.AspNetCore. Identity.IdentityUser]'。）（验证服务描述符“ServiceType：Microsoft.AspNetCore.Identity.IUserClaimsPrincipalFactory”时出错1[Microsoft.AspNetCore.Identity.IdentityUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.UserClaimsPrincipalFactory2[Microsoft.AspNetCore.Identity.IdentityUser,Microsoft.AspNetCore.Identity.IdentityRole]'：无法解析类型'Microsoft.AspNetCore.Identity.IUserStore 1[Microsoft.AspNetCore.Identity.IdentityUser]' while attempting to activate 'Microsoft.AspNetCore.Identity.UserManager1[Microsoft.AspNetCore.Identity.IdentityUser]'的服务。）（错误时验证服务描述符“ServiceType: Microsoft.AspNetCore.Identity.UserManager 1[Microsoft.AspNetCore.Identity.IdentityUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.UserManager1[Microsoft.AspNetCore.Identity.IdentityUser]”：无法解析“Microsoft.AspNetCore.Identity.IUserStore 1[Microsoft.AspNetCore.Identity.IdentityUser]' while attempting to activate 'Microsoft.AspNetCore.Identity.UserManager1[Microsoft.AspNetCore.Identity.IdentityUser] ”类型的服务'.)（验证服务描述符时出错：“ServiceType: Microsoft.AspNetCore.Identity.SignInManager 1[Microsoft.AspNetCore.Identity.IdentityUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.SignInManager1[Microsoft.AspNetCore.Identity.IdentityUser]”：无法解析“Microsoft.AspNetCore.Identity.IUserStore”类型的服务1[Microsoft.AspNetCore.Identity.IdentityUser]' while attempting to activate 'Microsoft.AspNetCore.Identity.UserManager1[Microsoft.AspNetCore.Identity.IdentityUser]'。）（验证服务描述符“ServiceType：Microsoft.AspNetCore.Identity.RoleManager 1[Microsoft.AspNetCore.Identity.IdentityRole] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.RoleManager1[Microsoft.AspNetCore.Identity.IdentityRole]”时出错：无法解析类型“Microsoft”的服务.AspNetCore.Identity.IRoleStore 1[Microsoft.AspNetCore.Identity.IdentityRole]' while attempting to activate 'Microsoft.AspNetCore.Identity.RoleManager1[Microsoft.AspNetCore.Identity.IdentityRole]'.) Source=Microsoft.Extensions.DependencyInjection StackTrace: at Microsoft.Extensions.DependencyInjection.ServiceProvider..ctor(IEnumerable 1 serviceDescriptors, ServiceProviderOptions options) at Microsoft.Extensions.DependencyInjection.ServiceCollectionContainerBuilderExtensions.BuildServiceProvider(IServiceCollection services, ServiceProviderOptions options) at Microsoft.Extensions.DependencyInjection.DefaultServiceProviderFactory.CreateServiceProvider(IServiceCollection containerBuilder) at Microsoft.Extensions.Hosting.Internal.ServiceFactoryAdapter1.CreateServiceProvider(Object containerBuilder) at Microsoft .Extensions.Hosting.HostBuilder.CreateServiceProvider() at Microsoft.Extensions.Hosting.HostBuilder.Build() at TheWorld.Program.Main(String[] args) in C:\Users\mli2805\source\repos\TheWorld\TheWorld\程序.cs：第10行

内部异常 1：InvalidOperationException：1[Microsoft.AspNetCore.Identity.IdentityUser]': Unable to resolve service for type 'Microsoft.AspNetCore.Identity.IUserStore在尝试激活“ ServiceType：Microsoft.AspNetCore.Identity.ISecurityStampValidator Lifetime：Scoped ImplementationType：Microsoft.AspNetCore.Identity.SecurityStampValidator 1[Microsoft.AspNetCore.Identity.IdentityUser]”时出错：Microsoft.AspNetCore.Identity.UserManager`1[Microsoft.AspNetCore.Identity.IdentityUser]'。

内部异常 2：InvalidOperationException：无法解析“Microsoft.AspNetCore.Identity.IUserStore 1[Microsoft.AspNetCore.Identity.IdentityUser]' while attempting to activate 'Microsoft.AspNetCore.Identity.UserManager1[Microsoft.AspNetCore.Identity.IdentityUser]”类型的服务。

如果我实施 public class MyUserStore : IUserStore<IdentityUser>

并添加一行 services.AddScoped<IUserStore<IdentityUser>, MyUserStore>();

到 ConfigurationServices，我收到关于下一个错误

无法解析“Microsoft.AspNetCore.Identity.IRoleStore”类型的服务

等等，虽然在教程中没有关于实现所有这些接口的内容。在我看来，我在配置服务中做错了什么？

Answer 1

您需要添加AddEntityFrameworkStores<TContext>()：

services.AddIdentity<IdentityUser, IdentityRole>()
    .AddEntityFrameworkStores<WorldContext>();

FWIW，ASP.NET Core 1.1 并没有“有点过时”。引用该版本的文档已经过时，几乎毫无用处。2.X 中发生了如此大的变化，3.X 中的变化更大。您应该找到不同的文章/教程。