c# - 获取 View 中的当前用户的 ASP.NET 标识

Question

我使用 ASP.NET Identity 2.0 和 MVC。我需要在 View 中记录用户的姓名、姓氏、电子邮件等。怎么才能得到呢？我只能得到 @User.Identity，但没有我的用户类的属性。

//in my view, i need here my ApplicationUser class
<div>
@User.Identity.Name
</div>

//ApplicationUser class
public class ApplicationUser : IdentityUser<int, CustomUserLogin, CustomUserRole,
CustomUserClaim> 
{
    public ApplicationUser()
    {
        this.CreatedDate = DateTime.Now;
    }

    public DateTime CreatedDate { get; set; }

    public string Name { get; set; }

    public string Surname { get; set; }

    public string TaxOffice { get; set; }
}

Answer 1

如果您只需要获取特定的属性，您可以将它们作为声明添加到您的 ApplicationUser 类中，如下例所示:

public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser, int> manager)
{
    // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
    var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
    // Add custom user claims here
    userIdentity.AddClaim(new Claim("FullName", this.FullName));
    // or use the ClaimTypes enumeration
    return userIdentity;
}

这是从 Startup.Auth 类连接起来的:

    SessionStateSection sessionStateSection = ConfigurationManager.GetSection("system.web/sessionState") as SessionStateSection;
    app.UseCookieAuthentication(new CookieAuthenticationOptions
    {
        AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
        LoginPath = new PathString("/account/login"),
        CookieName = sessionStateSection.CookieName + "_Application",
        Provider = new CookieAuthenticationProvider
        {
            // Enables the application to validate the security stamp when the user logs in.
            OnValidateIdentity = SecurityStampValidator.OnValidateIdentity<ApplicationUserManager, ApplicationUser, int>
                (
                     validateInterval: TimeSpan.FromMinutes(30),
                     regenerateIdentityCallback: (manager, user) => user.GenerateUserIdentityAsync(manager),
                     getUserIdCallback: (id) => (id.GetUserId<int>())
                ) 

        }
    });

然后，您可以访问声明(在 View 或 Controller 中):

var claims = ((System.Security.Claims.ClaimsIdentity)User.Identity).Claims;
var claim = claims.SingleOrDefault(m => m.Type == "FullName");

这里没有表单例份验证票。

如果您想要完整的用户详细信息可用，您始终可以创建如下扩展方法:

public static ApplicationUser GetApplicationUser(this System.Security.Principal.IIdentity identity)
{
    if (identity.IsAuthenticated)
    {
        using (var db = new AppContext())
        {
            var userManager = new ApplicationUserManager(new ApplicationUserStore(db));
            return userManager.FindByName(identity.Name);
        }
    }
    else
    {
        return null;
    }        
}

然后这样调用它:

@User.Identity.GetApplicationUser();

但是，如果您一直调用它，我会建议缓存。