Json的使用

        var webClient = new WebClient();        webClient.Credentials = CredentialCache.DefaultCredentials;//获取或设置用于向Internet资源的请求进行身份验证的网络凭据        String sql = String.Format(地址);        Byte[] bytes = webClient.DownloadData(sql);                //反序列化        using (MemoryStream ms = new MemoryStream(bytes))        {            DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(Weather));            Weather wer = (Weather)serializer.ReadObject(ms);            res.Content += wer.result.citynm + "\n";            res.Content += wer.result.days +"\n";            res.Content += wer.result.week + "\n";            res.Content += wer.result.wether + "\n";            res.Content += wer.result.temperature + "\n";        }