c# - 每秒从 json Web 服务获取数据

Question

我为 windows phone 项目创建了一个 json web 服务。我需要每秒从 Web 服务中恢复数据，我使用带线程的 DispatcherTimer 系统

private void client_DownloadInfoConf(object sender, DownloadStringCompletedEventArgs e)
    {
        if (e.Error == null)
        {
            //some code
            DispatcherTimer TradeThread = new DispatcherTimer();
            TradeThread.Interval = TimeSpan.FromMilliseconds(1000);
            TradeThread.Tick += new EventHandler(dispatcherTimer_Tick);
            TradeThread.Start();

        }
        else
            MessageBox.Show("Error : " + e.Error);
    }
    private void dispatcherTimer_Tick(object sender, EventArgs e)
    {
        WebClient client_quest = new WebClient();


        client_quest.DownloadStringAsync(new Uri("url" + info_conf.id));
        client_quest.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client_DownloadQuestConf); 
    }
    private void client_DownloadQuestConf(object sender, DownloadStringCompletedEventArgs e)
    {
        if (e.Error == null)
        {
            string text = e.Result;
            QuestConf resultat = JsonConvert.DeserializeObject<QuestConf>(e.Result);
            string sub = texte.Substring(0, 5);
            TextBlock text_quest = new TextBlock();
            foreach (var cust in resultat)
            {

                //The problem is here, i can't retrieve data from the object
            }
        }
        else
            MessageBox.Show("Error" + e.Error);
    }

这里的问题是，如果我尝试从“var cust”获取数据，则会发生错误，我无法从对象中提取数据......

类，用于提取 json Web 服务的数据

 public class Question
    {
        public string id { get; set; }
        public string category { get; set; }
        public string name { get; set; }
        public string value { get; set; }
    }

    public class Answer
    {
        public string id { get; set; }
        public string label { get; set; }
    }

    public class QuestConf:List<object>
    {
        public Question question { get; set; }
        public List<Answer> answers { get; set; }
    }

预先感谢您的帮助

Answer 1

如果您从 Web 服务获取数据并希望反序列化为对象，我相信您应该将 [DataContract] 和 [DataMember] 属性添加到您的类和属性中。对您从 Web 服务检索的每个对象尝试这样的操作：

[DataContract]
public class QuestConf:List<object>
{
    [DataMember]
    public Question question { get; set; }
    [DataMember]
    public List<Answer> answers { get; set; }
}