WP7 从 Web 服务查询中设置公共字符串值

Question

我正在尝试从 Web 服务中获取信息，然后在整个项目中使用该信息，但无法弄清楚如何从 Web 服务查询中设置公共字符串。目前，我已将 id 硬编码到公共字符串中。如何将硬编码的值替换为查询返回的值？

public MainPage()
    {
        WebClient id = new WebClient();

        id.Credentials = new NetworkCredential(UsernameSetting, PasswordSetting);
        id.DownloadStringCompleted += new DownloadStringCompletedEventHandler(id_DownloadStringCompleted);
        id.DownloadStringAsync(new Uri("https://web-service-address/"));
    }

    void id_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
    {
        if (e.Error != null)
            return;

        XDocument xDocument = XDocument.Parse(e.Result);

        var myid = xDocument.Descendants("service").First();
    }

    public string IDSetting = "1234567";

Answer 1

可以在id_DownloadStringCompleted()的最后将myid的值赋给IDSetting

IDSetting = myid;