HttpClient _httpClient = new HttpClient();            var clientId = Config.GetValue("AuthUser");            var clientSecret = Config.GetValue("AuthPass");            var apiHost = Config.GetValue("ApiHost");            _httpClient.BaseAddress = new Uri(apiHost);            var parameters = new Dictionary
     
      ();            parameters.Add("grant_type", "password");            parameters.Add("username", account);            parameters.Add("password", password);            _httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(                "Basic", Convert.ToBase64String(Encoding.ASCII.GetBytes(clientId + ":" + clientSecret))                );            var response = await _httpClient.PostAsync("/token", new FormUrlEncodedContent(parameters));            var responseValue = await response.Content.ReadAsStringAsync();            if (response.StatusCode == System.Net.HttpStatusCode.OK)            {                var access_token = JObject.Parse(responseValue)["access_token"].Value
      
       ();                return new TokenResult() { Message = "ok", access_token = access_token };                //return JObject.Parse(responseValue)["access_token"].Value
       
        ();            }            else            {                var modelstate = JObject.Parse(responseValue)["ModelState"][0].Value
        
         ();                return new TokenResult() { Message = modelstate };            }            //string url = Config.GetValue("ApiHost") + "/token";            ////设置HttpClientHandler的AutomaticDecompression            //var handler = new HttpClientHandler() { AutomaticDecompression = DecompressionMethods.GZip };            ////创建HttpClient（注意传入HttpClientHandler）            //using (var http = new HttpClient(handler))            //{            //    //使用FormUrlEncodedContent做HttpContent            //    var content = new FormUrlEncodedContent(new Dictionary
         
          ()            //    {            //        {"grant_type", "password"},//键名必须为空            //        { "username", account},            //        {"password", password },            //     });            //    //await异步等待回应            //    var response = await http.PostAsync(url, content);            //    //确保HTTP成功状态值            //    response.EnsureSuccessStatusCode();            //    //await异步读取最后的JSON（注意此时gzip已经被自动解压缩了，因为上面的AutomaticDecompression = DecompressionMethods.GZip）            //    var responseValue = await response.Content.ReadAsStringAsync();            //    if (response.StatusCode == System.Net.HttpStatusCode.OK)            //    {            //        return JObject.Parse(responseValue)["access_token"].Value
          
           (); // } // else // { // return string.Empty; // } //}