如何解决AspNet Core中的运行时标识配置问题

Question

我正在使用创建一个应用程序。Net Core 3并使用AspNetCore。身份EntityFrameworkCore用于创建用户角色，但在编写数据库种子设定命令后，我遇到了运行时错误。

我的Startup.cs类

public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext<DataContext>(opt => {
opt.UseSqlite(Configuration.GetConnectionString("DefaultConnection"));
});
services.AddCors(opt => {
opt.AddPolicy("CorsPolicy", policy => {
policy.AllowAnyHeader().AllowAnyMethod().WithOrigins("http://localhost:3000");
});
});
services.AddControllers();
services.AddMediatR(typeof(List.Handler).Assembly);
services.AddMvc(option => option.EnableEndpointRouting = false)
.AddFluentValidation(cfg => cfg.RegisterValidatorsFromAssemblyContaining<Create>());
var builder = services.AddIdentityCore<AppUser>().AddEntityFrameworkStores<DbContext>();
var identityBuilder = new IdentityBuilder(builder.UserType, builder.Services);
identityBuilder.AddEntityFrameworkStores<DataContext>();
identityBuilder.AddSignInManager<SignInManager<AppUser>>();
}

`

我的数据上下文类是

public class DataContext : IdentityDbContext<AppUser>
{
public DataContext(DbContextOptions options) : base(options)
{
}
public DbSet<Value> Values { get; set; }
public DbSet<Activity> Acitivities {get;set;}
protected override void OnModelCreating(ModelBuilder builder)
{
base.OnModelCreating(builder);
builder.Entity<Value>()
.HasData(
new Value {Id = 1, Name = "Biraz1"},
new Value {Id = 2, Name = "Biraz2"},
new Value {Id = 3, Name = "Biraz3"}
);
}
}

我的AppUser类

using Microsoft.AspNetCore.Identity;
namespace Domain
{
public class AppUser : IdentityUser
{
public string DisplayName { get; set; }
}
}

我的Program.cs类是

public static void Main(string[] args)
{
var host = CreateHostBuilder(args).Build();
//Create database based on our Migrations
using (var scope = host.Services.CreateScope())
{
var services = scope.ServiceProvider;
try 
{
var context = services.GetRequiredService<DataContext>();
var userManager = services.GetRequiredService<UserManager<AppUser>>();
context.Database.Migrate();
Seed.SeedData(context, userManager).Wait();
}
catch (Exception ex)
{
var logger = services.GetRequiredService<ILogger<Program>>();
logger.LogError(ex, "An error occured during migration");
}
}
host.Run();

}

我得到的错误：

An error occurred while starting the application.
AggregateException: Some services are not able to be constructed (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.IUserClaimsPrincipalFactory`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.UserClaimsPrincipalFactory`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.UserManager`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.UserManager`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.IUserStore`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.ISecurityStampValidator Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.SecurityStampValidator`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.ITwoFactorSecurityStampValidator Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.TwoFactorSecurityStampValidator`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.SignInManager`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.SignInManager`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.)
Microsoft.Extensions.DependencyInjection.ServiceProvider..ctor(IEnumerable<ServiceDescriptor> serviceDescriptors, ServiceProviderOptions options)
InvalidOperationException: Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.IUserClaimsPrincipalFactory`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.UserClaimsPrincipalFactory`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.ValidateService(ServiceDescriptor descriptor)
InvalidOperationException: Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.UserManager`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.UserManager`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.ValidateService(ServiceDescriptor descriptor)
InvalidOperationException: Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.IUserStore`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.ValidateService(ServiceDescriptor descriptor)
InvalidOperationException: Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.ISecurityStampValidator Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.SecurityStampValidator`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.ValidateService(ServiceDescriptor descriptor)
InvalidOperationException: Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.ITwoFactorSecurityStampValidator Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.TwoFactorSecurityStampValidator`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.ValidateService(ServiceDescriptor descriptor)
InvalidOperationException: Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.SignInManager`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.SignInManager`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.ValidateService(ServiceDescriptor descriptor)
AggregateException: Some services are not able to be constructed (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.IUserClaimsPrincipalFactory`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.UserClaimsPrincipalFactory`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.UserManager`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.UserManager`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.IUserStore`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.ISecurityStampValidator Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.SecurityStampValidator`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.ITwoFactorSecurityStampValidator Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.TwoFactorSecurityStampValidator`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.SignInManager`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.SignInManager`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.)
Microsoft.Extensions.DependencyInjection.ServiceProvider..ctor(IEnumerable<ServiceDescriptor> serviceDescriptors, ServiceProviderOptions options)
Microsoft.Extensions.DependencyInjection.ServiceCollectionContainerBuilderExtensions.BuildServiceProvider(IServiceCollection services, ServiceProviderOptions options)
Microsoft.Extensions.DependencyInjection.DefaultServiceProviderFactory.CreateServiceProvider(IServiceCollection containerBuilder)
Microsoft.Extensions.Hosting.Internal.ServiceFactoryAdapter<TContainerBuilder>.CreateServiceProvider(object containerBuilder)
Microsoft.Extensions.Hosting.HostBuilder.CreateServiceProvider()
Microsoft.Extensions.Hosting.HostBuilder.Build()
API.Program.Main(string[] args) in Program.cs
+
var host = CreateHostBuilder(args).Build();
Show raw exception details
InvalidOperationException: Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.IUserClaimsPrincipalFactory`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.UserClaimsPrincipalFactory`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.ValidateService(ServiceDescriptor descriptor)
Microsoft.Extensions.DependencyInjection.ServiceProvider..ctor(IEnumerable<ServiceDescriptor> serviceDescriptors, ServiceProviderOptions options)
Show raw exception details
InvalidOperationException: Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.UserManager`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.UserManager`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.ValidateService(ServiceDescriptor descriptor)
Microsoft.Extensions.DependencyInjection.ServiceProvider..ctor(IEnumerable<ServiceDescriptor> serviceDescriptors, ServiceProviderOptions options)
Show raw exception details
InvalidOperationException: Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.IUserStore`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.ValidateService(ServiceDescriptor descriptor)
Microsoft.Extensions.DependencyInjection.ServiceProvider..ctor(IEnumerable<ServiceDescriptor> serviceDescriptors, ServiceProviderOptions options)
Show raw exception details
InvalidOperationException: Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.ISecurityStampValidator Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.SecurityStampValidator`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.ValidateService(ServiceDescriptor descriptor)
Microsoft.Extensions.DependencyInjection.ServiceProvider..ctor(IEnumerable<ServiceDescriptor> serviceDescriptors, ServiceProviderOptions options)
Show raw exception details
InvalidOperationException: Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.ITwoFactorSecurityStampValidator Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.TwoFactorSecurityStampValidator`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.ValidateService(ServiceDescriptor descriptor)
Microsoft.Extensions.DependencyInjection.ServiceProvider..ctor(IEnumerable<ServiceDescriptor> serviceDescriptors, ServiceProviderOptions options)
Show raw exception details
InvalidOperationException: Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.SignInManager`1[Domain.AppUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.SignInManager`1[Domain.AppUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserOnlyStore`3[Domain.AppUser,Microsoft.EntityFrameworkCore.DbContext,System.String]'.
Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.ValidateService(ServiceDescriptor descriptor)
Microsoft.Extensions.DependencyInjection.ServiceProvider..ctor(IEnumerable<ServiceDescriptor> serviceDescriptors, ServiceProviderOptions options)

我的AppUser类是

using Microsoft.AspNetCore.Identity;
namespace Domain
{
public class AppUser : IdentityUser
{
public string DisplayName { get; set; }
}
}

我该如何解决这个问题？

Answer 1

我很确定这是我知道的在线课程，问题是由于他使用的是net core 2.2。要解决这个问题，请在startup.cs:中添加

services.TryAddSingleton<ISystemClock, SystemClock>();

所以你的最终代码应该是这样的：

services.TryAddSingleton<ISystemClock, SystemClock>();
var builder = services.AddIdentityCore<AppUser>();
var identityBuilder = new IdentityBuilder(builder.UserType, builder.Services);
identityBuilder.AddEntityFrameworkStores<DataContext>();
identityBuilder.AddSignInManager<SignInManager<AppUser>>();

丢失的错误idk为什么你隐藏它

无法解析类型的服务"微软。AspNetCore。身份验证。"ISystemClock"激活"Microsoft。AspNetCore。身份blablalbla