创建角色身份框架

Question

为用户创建角色时遇到问题。我遵循以下指南。 https://gooroo.io/GoorooTHINK/Article/17333/Custom-user-roles-and-rolebased-authorization-in-ASPNET-core/32835#.XOBFAcgzbcs

我在“ Startup.cs”中添加了“ CreateRoles”方法

private async Task CreateRoles(IServiceProvider serviceProvider)
{
        //adding custom roles
        var RoleManager = serviceProvider.GetRequiredService<RoleManager<IdentityRole>>();
        var UserManager = serviceProvider.GetRequiredService<UserManager<IdentityUser>>();
        string[] roleNames = { "Admin", "Manager", "Member" };
        IdentityResult roleResult;
        foreach (var roleName in roleNames)
        {
            //creating the roles and seeding them to the database
            var roleExist = await RoleManager.RoleExistsAsync(roleName);
            if (!roleExist)
            {
                roleResult = await RoleManager.CreateAsync(new IdentityRole(roleName));
            }
        }
        //creating a super user who could maintain the web app
        var poweruser = new IdentityUser
        {
            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)
            {
                //here we tie the new user to the "Admin" role 
                await UserManager.AddToRoleAsync(poweruser, "Admin");
                }
        }
}

我在“配置”中称呼它：

CreateRoles(serviceProvider).Wait();

运行应用程序时，发生异常

  

AggregateException：发生一个或多个错误。 （没有注册“ Microsoft.AspNetCore.Identity.RoleManager`1 [Microsoft.AspNetCore.Identity.IdentityRole]”类型的服务。）

该如何解决？

Answer 1

追加AddRoles以添加角色服务：

services.AddDefaultIdentity<IdentityUser>()
    .AddRoles<IdentityRole>()
    .AddDefaultUI(UIFramework.Bootstrap4)
    .AddEntityFrameworkStores<ApplicationDbContext>();

或在ConfigureServices方法中将AddDefaultIdentity方法替换为AddIdentity方法

services.AddIdentity<IdentityUser,IdentityRole>()
        .AddDefaultUI(UIFramework.Bootstrap4)
        .AddEntityFrameworkStores<ApplicationDbContext>();