asp.net-mvc – ASP.NET标识：在Azure网站上使用GeneratePasswor

var token = await _userManager.GeneratePasswordResetTokenAsync(user.Id);

我收到以下错误：

System.Security.Cryptography.CryptographicException: The data protection operation was unsuccessful. This may have been caused by not having the user profile loaded for the current thread’s user context,which may be the case when the thread is impersonating.

如何让它在Azure上运行？

或者是否有其他方法可以在不知道旧密码的情况下重置密码？

这是我的UserManager类. Mabey有一个错误.

public class ApplicationUserManager : UserManager<ApplicationIdentityUser>
{
    private static IUnitOfWork _unitOfWork;
    private readonly IRepository<ApplicationIdentityUser> _userRepository;


    public ApplicationUserManager(IUserStore<ApplicationIdentityUser> store,IRepository<ApplicationIdentityUser> userRepository)
        : base(store)
    {
        if (userRepository == null) throw new ArgumentNullException("userRepository");

        _userRepository = userRepository;

        if (bool.Parse(ConfigurationManager.AppSettings["RunningInAzure"]))
            UserTokenProvider = new EmailTokenProvider<ApplicationIdentityUser,string>();
        else
        {
            var provider = new Microsoft.Owin.Security.DataProtection.DpapiDataProtectionProvider("TopRijden");
            UserTokenProvider = new DataProtectorTokenProvider<ApplicationIdentityUser,string>(provider.Create("Password Reset"));
        }
    }


    public static ApplicationUserManager Create(IdentityFactoryOptions<ApplicationUserManager> options,IOwinContext context)
    {
        if (options == null) throw new ArgumentNullException("options");
        if (context == null) throw new ArgumentNullException("context");

        try
        {
            _unitOfWork = ObjectFactory.GetInstance<IUnitOfWork>();
            var userRepository = ObjectFactory.GetInstance<IRepository<ApplicationIdentityUser>>();

            var manager = new ApplicationUserManager(new UserStore<ApplicationIdentityUser>(_unitOfWork.Session),userRepository);

            // Configure validation logic for usernames
            manager.UserValidator = new UserValidator<ApplicationIdentityUser>(manager)
            {
                AllowOnlyAlphanumericUserNames = false,RequireUniqueEmail = true
            };

            // Configure validation logic for passwords
            manager.PasswordValidator = new PasswordValidator
            {
                RequiredLength = 6,RequireNonLetterOrDigit = true,RequireDigit = true,RequireLowercase = true,RequireUppercase = true,};

            // Register two factor authentication providers. This application uses Phone and Emails as a step of receiving a code for verifying the user
            // You can write your own provider and plug in here.
            manager.RegisterTwoFactorProvider("PhoneCode",new PhoneNumberTokenProvider<ApplicationIdentityUser>
            {
                MessageFormat = "Your security code is: {0}"
            });

            manager.RegisterTwoFactorProvider("EmailCode",new EmailTokenProvider<ApplicationIdentityUser>
            {
                Subject = "Security Code",BodyFormat = "Your security code is: {0}"
            });

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

            return manager;
        }
        catch (Exception ex)
        {
            ex.Process(MethodBase.GetCurrentMethod().DeclaringType,MethodBase.GetCurrentMethod().Name);

            return null;
        }
    }      
}

}