如何在同一个AccountController中用UserManager和SignInManager实现多注册登录表单？

我正在开发血库项目，当前AccountController已实现Donor（献血者）的注册与登录功能，现希望在同一个AccountController中，使用UserManager和SignInManager为ReciptionBank（血库接收方）创建对应的注册和登录表单，请问该如何实现？

现有代码如下：

namespace BloodBank.Controllers
{
    public class AccountController : Controller
    {
        private UserManager<Donor> _userManager;
        private SignInManager<Donor> _signInManager;     
        public AccountController(UserManager<Donor> userManager, SignInManager<Donor> signInManager)
        {
            _userManager = userManager;
            _signInManager = signInManager;
        }
        [HttpGet]
        public IActionResult Register_Donor()
        {
            return View();
        }
        [HttpPost]
        public async Task<IActionResult> Register_Donor(DonorRegisterViewModel model)
        {
            if (ModelState.IsValid)
            {
                Donor user = new Donor
                {
                    FirstName = model.FirstName,
                    LastName = model.LastName,
                    UserName = model.UserName,
                    PhoneNumber = model.PhonNum,
                    NationalityNum = model.NationalityNum,
                    Age = model.Age,
                    GenderType = model.GenderType,
                    TypeBlood = model.TypeBlood,
                    Address = model.Address

                };
                var result = await _userManager.CreateAsync(user, model.Password);
                if (result.Succeeded)
                {
                    return RedirectToAction("Login");
                }
                foreach (var err in result.Errors)
                {
                    ModelState.AddModelError("", err.Description);
                }
                return View(model);
            }
            return View(model);
        }

        [HttpGet]
        public IActionResult Login()
        {

            return View();
        }

        [HttpPost]
        public async Task<IActionResult> Login(DonorLoginViewModel model)
        {
            if (ModelState.IsValid)
            {
                var result = await _signInManager.PasswordSignInAsync(model.UserName, model.Password, model.RememberMe, false);

                if (result.Succeeded)
                {
                    return RedirectToAction("DonorHome", "Donor");
                }
                ModelState.AddModelError("", "Invalid User Or Password");
                return View(model);

            }
            return View(model);
        }
        [HttpGet]
        public IActionResult Register_ReciptionBank()
        {
            return View();
        }
        [HttpPost]
        public async Task<IActionResult> Register_ReciptionBank(ReciptionBank model)
        {
            if (ModelState.IsValid)
            {
                ReciptionBank bank = new ReciptionBank
                {
                    HospitalName=model.HospitalName,
                    Location=model.Location

                };
                var result = await _userManager.CreateAsync(bank, model.HospitalName);
            }
            return View(model);
        }
    }
}

解决方案步骤 #

1. 统一用户基类 #

确保Donor和ReciptionBank都继承自同一个Identity用户基类（比如IdentityUser或自定义AppUser），让UserManager和SignInManager能同时处理两种用户类型：

// 自定义通用用户基类（也可直接使用IdentityUser）
public class AppUser : IdentityUser
{
    // 可添加通用属性，如创建时间等
}

// 献血者类继承基类
public class Donor : AppUser
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string NationalityNum { get; set; }
    public int Age { get; set; }
    public string GenderType { get; set; }
    public string TypeBlood { get; set; }
    public string Address { get; set; }
}

// 血库接收方类继承基类
public class ReciptionBank : AppUser
{
    public string HospitalName { get; set; }
    public string Location { get; set; }
}

2. 修改Controller依赖注入 #

将原UserManager<Donor>和SignInManager<Donor>替换为针对基类的实例，支持两种用户处理：

private readonly UserManager<AppUser> _userManager;
private readonly SignInManager<AppUser> _signInManager;

public AccountController(UserManager<AppUser> userManager, SignInManager<AppUser> signInManager)
{
    _userManager = userManager;
    _signInManager = signInManager;
}

3. 完善ReciptionBank注册逻辑 #

3.1 创建注册ViewModel

避免直接用实体类接收请求，创建专用ViewModel：

public class ReciptionBankRegisterViewModel
{
    [Required]
    public string HospitalName { get; set; }

    [Required]
    public string Location { get; set; }

    [Required]
    [Display(Name = "用户名")]
    public string UserName { get; set; }

    [Required]
    [DataType(DataType.Password)]
    public string Password { get; set; }

    [Required]
    [DataType(DataType.Password)]
    [Compare("Password", ErrorMessage = "密码与确认密码不匹配")]
    public string ConfirmPassword { get; set; }
}

3.2 实现注册方法

修改原Register_ReciptionBank方法，完善业务逻辑：

[HttpGet]
public IActionResult Register_ReciptionBank()
{
    return View();
}

[HttpPost]
public async Task<IActionResult> Register_ReciptionBank(ReciptionBankRegisterViewModel model)
{
    if (ModelState.IsValid)
    {
        var bank = new ReciptionBank
        {
            UserName = model.UserName,
            HospitalName = model.HospitalName,
            Location = model.Location
        };

        var result = await _userManager.CreateAsync(bank, model.Password);
        if (result.Succeeded)
        {
            return RedirectToAction("Login");
        }

        // 注册失败时添加错误提示
        foreach (var err in result.Errors)
        {
            ModelState.AddModelError("", err.Description);
        }
    }
    return View(model);
}

4. 实现ReciptionBank登录功能 #

4.1 创建通用登录ViewModel

支持用户类型选择，兼容两种身份登录：

public class LoginViewModel
{
    [Required]
    public string UserName { get; set; }

    [Required]
    [DataType(DataType.Password)]
    public string Password { get; set; }

    [Display(Name = "记住我")]
    public bool RememberMe { get; set; }

    // 用户类型标识：Donor/ReciptionBank
    public string UserType { get; set; }
}

4.2 修改登录方法

根据用户类型跳转对应页面：

[HttpGet]
public IActionResult Login()
{
    return View();
}

[HttpPost]
public async Task<IActionResult> Login(LoginViewModel model)
{
    if (ModelState.IsValid)
    {
        var result = await _signInManager.PasswordSignInAsync(model.UserName, model.Password, model.RememberMe, false);

        if (result.Succeeded)
        {
            var user = await _userManager.FindByNameAsync(model.UserName);
            // 根据用户类型跳转对应主页
            if (user is Donor)
            {
                return RedirectToAction("DonorHome", "Donor");
            }
            else if (user is ReciptionBank)
            {
                return RedirectToAction("BankHome", "ReciptionBank");
            }
        }
        ModelState.AddModelError("", "用户名或密码错误");
    }
    return View(model);
}

5. 配置视图 #

• 为Register_ReciptionBank创建视图，绑定ReciptionBankRegisterViewModel的字段；
• 修改Login视图，添加UserType的单选按钮或下拉选择框，让用户选择登录身份。

内容的提问来源于stack exchange，提问作者Basel Awadeen