ASP.NET CORE 2.1身份已注冊

Question

我對Identity ASP.net Core 2.1有問題。 我在startup.cs中創建角色。 運行時顯示錯誤

AggregateException：發生一個或多個錯誤。 （沒有注冊用於類型'Microsoft.AspNetCore.Identity.RoleManager`1 [Microsoft.AspNetCore.Identity.IdentityRole]'的服務。）System.Threading.Tasks.Task.Wait（int毫秒超時，CancellationToken cancelToken）System.Threading。 Startup.cs + CreateRoles（serviceProvider）.Wait（）中的Tasks.Task.Wait（）ContosoUniversity.Startup.Configure（IApplicationBuilder應用，IHostingEnvironment env，IServiceProvider serviceProvider） Microsoft.AspNetCore.Hosting.ConventionBasedStartup.Configure（IApplicationBuilder應用程序）Microsoft.AspNetCore.Server.IISIntegration.IISSetupFilter + <> c__DisplayClass4_0.b__0（IApplicationBuilder應用程序）Microsoft.AspNetCore.HostFilteringStartupFilter + <> c__DisplayClass0_0.b__0（IApplicationBuilder） .Internal.AutoRequestServicesStartupFilter + <> c__DisplayClass0_0.b__0（IApplicationBuilder構建器）Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication（）

Statup.cs文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.EntityFrameworkCore;
using ContosoUniversity.Models;
using Microsoft.AspNetCore.Identity;
using ContosoUniversity.Areas.Identity.Data;

namespace ContosoUniversity
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;

        }
        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<CookiePolicyOptions>(options =>
            {
                // This lambda determines whether user consent for non-essential cookies is needed for a given request.
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);

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

            //services.AddIdentity<ContosoUniversityUser, IdentityRole>()
            //    .AddEntityFrameworkStores<IdentityContext>()
            //     .AddDefaultTokenProviders();


        }
        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env, IServiceProvider serviceProvider)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Error");
                app.UseHsts();
            }
            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseAuthentication();
            app.UseMvc();
            CreateRoles(serviceProvider).Wait();
        }
        public async Task CreateRoles(IServiceProvider serviceProvider)
        {

            //adding custom roles
            var RoleManager = serviceProvider.GetRequiredService<RoleManager<IdentityRole>>();
            //serviceProvider.GetService<RoleManager<IdentityRole>>();
            var UserManager = serviceProvider.GetRequiredService<UserManager<ContosoUniversityUser>>();
            string[] roleNames = { "Admin", "Manager", "Member" };
            IdentityResult roleResult;
            foreach (var roleName in roleNames)
            {
                var roleExist = await RoleManager.RoleExistsAsync(roleName);
                if (!roleExist)
                {
                    roleResult = await RoleManager.CreateAsync(new IdentityRole(roleName));
                }
            }
            var poweruser = new ContosoUniversityUser
            {
                UserName = Configuration.GetSection("UserSettings")["UserEmail"],
                Email = Configuration.GetSection("UserSettings")["UserEmail"]
            };

            string UserPassword = Configuration.GetSection("UserSettings")["UserPassword"];
            var _user = await UserManager.FindByEmailAsync(Configuration.GetSection("UserSettings")["UserEmail"]);

            if (_user == null)
            {
                var createPowerUser = await UserManager.CreateAsync(poweruser, UserPassword);
                if (createPowerUser.Succeeded)
                {
                    await UserManager.AddToRoleAsync(poweruser, "Admin");
                }
            }
        }
    }
}

Answer 1

您試圖使用asp.net-identity而不將其注冊到您的容器中。

在configure-service方法中，取消注釋這些行

services.AddIdentity<ContosoUniversityUser, IdentityRole>();
        .AddEntityFrameworkStores<IdentityContext>()
        .AddDefaultTokenProviders();

現在，服務提供者將了解這些服務，因為該擴展方法會為您注冊它們。

另外，不要忘記遷移數據庫，這樣它就可以了解用戶，角色等信息。

Answer 2

我嘗試在ConfigureServices中添加以下代碼。 這可以幫助我運行：

var builder = services.AddIdentityCore<ContosoUniversityUser>(opt =>
        {
            // Configure Password Options
            opt.Password.RequireDigit = true;
        }
        );
        builder = new IdentityBuilder(builder.UserType, typeof(IdentityRole), builder.Services);
        builder.AddRoleValidator<RoleValidator<IdentityRole>>();
        builder.AddRoleManager<RoleManager<IdentityRole>>();
        builder.AddSignInManager<SignInManager<ContosoUniversityUser>>();
        builder.AddEntityFrameworkStores<IdentityContext>().AddDefaultTokenProviders();

        services.TryAddSingleton<IHttpContextAccessor, HttpContextAccessor>();

Answer 3

看來您可以通過Asp.Net Core Identity Library實現Identity 。

您可以檢查項目以找到ProjectName-> Areas-> Identity-> IdentityHostingStartup 。 更改Configure如下所示：

    public class IdentityHostingStartup : IHostingStartup
{
    public void Configure(IWebHostBuilder builder)
    {
        builder.ConfigureServices((context, services) => {
            services.AddDbContext<CoreAppContext>(options =>
                options.UseSqlServer(
                    context.Configuration.GetConnectionString("CoreAppContextConnection")));
            services.AddIdentity<ContosoUniversityUser, IdentityRole>()
                    .AddEntityFrameworkStores<CoreAppContext>();
        });
    }
}

更新

根本原因是， services.AddDefaultIdentity沒有將IdentityRole添加到IServiceCollection ，請檢查此源代碼IdentityServiceCollectionUIExtensions ，該代碼調用AddIdentityCore 。

嘗試下面的代碼。

public class IdentityHostingStartup : IHostingStartup
{
    public void Configure(IWebHostBuilder builder)
    {
        builder.ConfigureServices((context, services) => {
            services.AddDbContext<IdentityContext>(options =>
                options.UseSqlServer(
                    context.Configuration.GetConnectionString("IdentityContextConnection")));

            services.AddDefaultIdentity<ContosoUniversityUser>()
                    .AddRoles<IdentityRole>() // Add IdentityRole to ServiceCollection
                    .AddEntityFrameworkStores<IdentityContext>();
        });
    }
}