UserPrincipal.current在iis7中返回null，

Question

以下在本地机器上工作正常（vs 2015）但是当我在iis7中发布时，用户主体变为null。任何人都可以帮助我。

[ActionName("Login")]
    [HttpGet]
    [CacheFilter(TimeDuration = 100)]
    public async Task<List<Hashtable>> Login([FromUri]string id, string netPwd)
    {
        await Task.Delay(100);
        bool response = false;

        // Build user id and password strings from KGP network credentials
        string uid = id;
        string password = netPwd;
        Hashtable hashChild = new Hashtable();

        List<Hashtable> list = new List<Hashtable>();

        // Define LDAP connection
        DirectoryEntry root = new DirectoryEntry("LdapAccount", uid, password, AuthenticationTypes.Secure);
        try
        {
            object connected = root.NativeObject;
            UserPrincipal userPrincipal = UserPrincipal.Current;

            if (HttpContext.Current.User.Identity.IsAuthenticated)
            {
                string s = "tri";
            }
            string EmployeeId = userPrincipal.EmployeeId;

            domainName = System.Environment.UserDomainName;

}

Answer 1

IIS是否使用SYSTEM帐户运行？

Answer 2

最后我得到了答案.. 需要添加

using (HostingEnvironment.Impersonate())
        {

//代码在这里

}

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