使用 MVC 5 Identity 按 ID 获取 IdentityUser

Question

创建另一个模型Testimonial 时，我将活动用户的Id 存储为Author，它是一个类似于：00b9c6aa-010c-4cbd-ac16-c72d05e7906a 的字符串。在另一个视图中，我想为每个Testimonial 显示与Id 关联的名称和其他用户信息。该视图将包含来自许多不同用户的信息，而不仅仅是主动登录的用户。我不知道如何通过Id 获取用户的信息。

如何通过Id 获得IdentityUser？

所有包含用户的表都是默认的，外加一些额外的列。在名为AspNetUsers 的表中，我有Id、FirstName、Email 等。Id 是键值，我想知道如何（在Testimonial 的控制器中) 检索给定Id 的信息。

Answer 1

IdentityConfig.cs // 配置此应用程序中使用的应用程序用户管理器。 UserManager 在 ASP.NET Identity 中定义并由应用程序使用。

public class ApplicationUserManager : UserManager<ApplicationUser>
{
    public ApplicationUserManager(IUserStore<ApplicationUser> store)
        : base(store)
    {
    }

    public static ApplicationUserManager Create(IdentityFactoryOptions<ApplicationUserManager> options, IOwinContext context)
    {
        var manager = new ApplicationUserManager(new UserStore<ApplicationUser>(context.Get<ApplicationDbContext>()));
        // Configure validation logic for usernames
        manager.UserValidator = new UserValidator<ApplicationUser>(manager)
        {
            AllowOnlyAlphanumericUserNames = false,
            RequireUniqueEmail = true
        };
        // Configure validation logic for passwords
        manager.PasswordValidator = new PasswordValidator
        {
            RequiredLength = 6,
            RequireNonLetterOrDigit = false,
            RequireDigit = false,
            RequireLowercase = false,
            RequireUppercase = false,
        };
        manager.EmailService = new EmailService();
        var dataProtectionProvider = options.DataProtectionProvider;
        if (dataProtectionProvider != null)
        {
            manager.UserTokenProvider = new DataProtectorTokenProvider<ApplicationUser>(dataProtectionProvider.Create("ASP.NET Identity"));
        }
        return manager;
    }
}
public class ApplicationSignInManager : SignInManager<ApplicationUser, string>
{
    public ApplicationSignInManager(ApplicationUserManager userManager, IAuthenticationManager authenticationManager) :
        base(userManager, authenticationManager) { }

    public override Task<ClaimsIdentity> CreateUserIdentityAsync(ApplicationUser user)
    {
        return user.GenerateUserIdentityAsync((ApplicationUserManager)UserManager);
    }

    public static ApplicationSignInManager Create(IdentityFactoryOptions<ApplicationSignInManager> options, IOwinContext context)
    {
        return new ApplicationSignInManager(context.GetUserManager<ApplicationUserManager>(), context.Authentication);
    }
}

在您的控制器中定义以下属性

    private ApplicationUserManager _userManager;
    public ApplicationUserManager UserManager
    {
        get
        {
            return _userManager ?? HttpContext.GetOwinContext().GetUserManager<ApplicationUserManager>();
        }
        private set
        {
            _userManager = value;
        }
    }
    private ApplicationSignInManager _signInManager;

    public ApplicationSignInManager SignInManager
    {
        get
        {
            return _signInManager ?? HttpContext.GetOwinContext().Get<ApplicationSignInManager>();
        }
        private set { _signInManager = value; }
    }

可以在控制器中使用以下方法

var user = await UserManager.FindByIdAsync("00b9c6aa-010c-4cbd-ac16-c72d05e7906a");

你可以像下面这样获取登录用户

var user = await UserManager.FindByIdAsync(await SignInManager.GetVerifiedUserIdAsync());