无法从apicontroller中的OwinContext获取UserManager

我正在跟踪一个Microsoft示例，以使用Identity 2.0.0实现电子邮件验证。

我被困在这部分

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

这可以在ApiController中工作，controller但HttpContext不包含任何GetOwinContext方法。

所以我尝试了，HttpContext.Current.GetOwinContext()但是该方法GetUserManager不存在。

我找不到UserManager在Startup.Auth.cs中构建I的方法

// For more information on configuring authentication, please visit http://go.microsoft.com/fwlink/?LinkId=301864
public void ConfigureAuth(IAppBuilder app)
{
    //Configure the db context, user manager and role manager to use a single instance per request
    app.CreatePerOwinContext(ApplicationDbContext.Create);
    app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create); 
    ...
}

这条线

app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);

调用以下函数来配置 UserManager

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 user lockout defaults
     manager.UserLockoutEnabledByDefault = true;
     manager.DefaultAccountLockoutTimeSpan = TimeSpan.FromMinutes(5);
     manager.MaxFailedAccessAttemptsBeforeLockout = 5;

     manager.EmailService = new EmailService();

     var dataProtectionProvider = options.DataProtectionProvider;
     if (dataProtectionProvider != null)
     {
         manager.UserTokenProvider = new DataProtectorTokenProvider<ApplicationUser>(dataProtectionProvider.Create("ASP.NET Identity"));
     }
     return manager;
}

如何UserManager在中访问此内容ApiController？

我真的误会了您的问题。我认为您只是缺少一些using语句。

该GetOwinContext().GetUserManager<ApplicationUserManager>()是 Microsoft.AspNet.Identity.Owin。

因此，请尝试添加此部分：

using Microsoft.AspNet.Identity.Owin;
using Microsoft.AspNet.Identity; // Maybe this one too

var manager = HttpContext.Current.GetOwinContext().GetUserManager<UserManager<User>>();

如果要对控制器进行单元测试，则此扩展方法可能是更好的解决方案。

using System;
using System.Net.Http;
using System.Web;
using Microsoft.Owin;

public static IOwinContext GetOwinContext(this HttpRequestMessage request)
{
    var context = request.Properties["MS_HttpContext"] as HttpContextWrapper;
    if (context != null)
    {
        return HttpContextBaseExtensions.GetOwinContext(context.Request);
    }
    return null;
}

用法：

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

这行代码节省了我的时间...

       var manager = 
       new ApplicationUserManager(new UserStore<ApplicationUser>(new ApplicationDbContext()));

您可以在控制器操作中使用它来获取UserManager的实例。