AspNetCore Identity 在运行时更新 DbContext答案

【问题标题】：AspNetCore Identity Update DbContext At RuntimeAspNetCore Identity 在运行时更新 DbContext
【发布时间】：2021-06-21 02:03:30
【问题描述】：

应用：

.NET 5 Web API
每个客户一个 sql 数据库
智威汤逊

问题：

有一个名为 'APIController' 的控制器使用 'Authenticate' 方法。此方法从正文接收“用户名”和“密码”。

通过这些参数，我能够检测到客户的数据库，但我不知道如何将数据库（dbContext）设置到我通过依赖注入获得的 userManager 中。

public class APIController : ControllerBase
{
    private readonly UserManager<ApplicationUser> _userManager;

    public APIController(UserManager<ApplicationUser> userManager)
    {
        _userManager = userManager
    }

    public async Task<IActionResult> Authenticate([FromBody] UserLoginModel model)
    {

        // Detect Customer's Database
        DbContext dbContext = GetCustomersDbContext(model.UserName);

        /* 
             Problem: 
             Check if the password is correct in the database I just found.
             How can I set the dbContext in _userManager?

             What I was trying to do:
             var store = new UserStore<ApplicationUser>(dbContext);
             var userManager = new UserManager<ApplicationUser>(store,
                _userManager.Options,
                _userManager.PasswordHasher,
                _userManager.UserValidators,
                _userManager.PasswordValidators,
                _userManager.KeyNormalizer,
                _userManager.ErrorDescriber,
                _serviceProvider,
                _logger);
        */
    }
}

Startup.cs

services.AddIdentity<ApplicationUser, IdentityRole>(options =>
            {
                options.User.RequireUniqueEmail = false;
            })
            .AddEntityFrameworkStores<FileWebDbContext>()
            .AddDefaultTokenProviders();

很多小时试图找到一个解决方案，如果有人给我任何想法，将不胜感激！

更新解决方案below

【问题讨论】：

标签： c# asp.net-core asp.net-identity asp.net-core-identity

【解决方案1】：

解决方案：

public class APIController : ControllerBase
{
    private readonly UserManager<ApplicationUser> _userManager;
    private readonly IOptions<IdentityOptions> _identityOptions;
    private readonly IServiceProvider _serviceProvider;
    private readonly ILogger<UserManager<ApplicationUser>> _logger;

    public APIController(
        UserManager<ApplicationUser> userManager,
        IOptions<IdentityOptions> identityOptions,
        IServiceProvider serviceProvider,
        ILogger<UserManager<ApplicationUser>> logger)
    {
        _userManager = userManager
        _identityOptions = identityOptions;
        _serviceProvider = serviceProvider;
        _logger = logger;
    }

    public async Task<IActionResult> Authenticate([FromBody] UserLoginModel model)
    {

        // Detect Customer's Database
        DbContext dbContext = GetCustomersDbContext(model.UserName);

        // Solution
        UserStore<ApplicationUser> store = new(dbContext);
        UserManager<ApplicationUser> uManager = new(store,
                _identityOptions,
                _userManager.PasswordHasher,
                _userManager.UserValidators,
                _userManager.PasswordValidators,
                _userManager.KeyNormalizer,
                _userManager.ErrorDescriber,
                _serviceProvider,
                _logger);
    }
}

【讨论】：