Question

我在访问O(n * sqrt(n) + k)类中的k和RoleManager时遇到问题。这是我用来注册UserManager的代码：

Startup.cs

用户是我的自定义类，继承自Identity，并通过其他一些属性进行了扩展。

我在services.AddIdentity<User, IdentityRole>(cfg => { cfg.User.RequireUniqueEmail = true; cfg.SignIn.RequireConfirmedEmail = true; }) .AddRoles<IdentityRole>() .AddEntityFrameworkStores<CarinioContext>() .AddDefaultTokenProviders() .AddErrorDescriber<CustomIdentityErrorDescriber>();类中有一个函数来创建角色和用户。我知道这对播种不利，我会在将来进行更改，但我需要首先使其以这种方式工作。这是我的代码：

IdentityUser

程序总是崩溃说：

startup.cs

private async Task CreateRoles() { //adding custom roles var UserManager = _serviceProvicer.GetRequiredService<UserManager<IdentityUser>>(); var RoleManager = _serviceProvicer.GetRequiredService<RoleManager<IdentityRole>>(); string[] roleNames = { "Admin", "Client", "Driver" }; 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 User { UserName = _configuration.GetSection("UserSettings")["UserName"], Email = _configuration.GetSection("UserSettings")["UserEmail"], PhoneNumber = _configuration.GetSection("UserSettings")["PhoneNumer"], }; 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"); } } }也是如此：

"One or more errors occurred. (No service for type 'Microsoft.AspNetCore.Identity.RoleManager`1[Microsoft.AspNetCore.Identity.IdentityUser]' has been registered.)"

我的猜测是我没有正确访问UserManager和"One or more errors occurred. (No service for type 'Microsoft.AspNetCore.Identity.UserManager`1[Microsoft.AspNetCore.Identity.IdentityUser]' has been registered.)"。有人知道解决方案吗？

Answer 1

dotnet核心具有出色的功能，可在第一时间为角色或用户提供种子在efcore的entityconfiguration部分中，您可以使用打击类创建默认角色：

public class RoleConfiguration : IEntityTypeConfiguration<Role>
{
    public void Configure(EntityTypeBuilder<Role> builder)
    {
       builder.HasData(new Role() {Id=1, Name = "Manager", NormalizedName = "MANAGER",Title="manager" }, new Role() {Id=2, Name = "Student", NormalizedName = "STUDENT",Title="student" });
    }
}

Answer 2

尝试修改您的代码：

var UserManager = _serviceProvicer.GetRequiredService<UserManager<IdentityUser>>();

至：

var UserManager = _serviceProvicer.GetRequiredService<UserManager<User>>();

如果您创建继承自IdentityUser的自定义类，则需要在User中注册新的ConfigureServices：

services.AddIdentity<User, IdentityRole>

在CarinioContext中类似：

public class CarinioContext: IdentityDbContext<User, IdentityRole, string>

在_LoginPartial.cshtml中：

@inject SignInManager<User> SignInManager
@inject UserManager<User> UserManager

Asp.Net Core没有针对Microsoft.AspNetCore.Identity.RoleManager类型的服务

2 个答案: