webservice返回dataset

 #region 获取webservice数据
  public static DataSet GetWebService(string webserviceUrl)
        {
            DataSet ds = new DataSet();

            string s = GetDataSetFromWebServiceByXmlDocument(webserviceUrl);
            XmlDocument xml = new XmlDocument();
            xml.LoadXml(s);
            String allxml = xml.DocumentElement.InnerXml;//xml.SelectSingleNode("string").InnerXml;
            string jxml = System.Web.HttpUtility.UrlDecode(allxml);

            ds = XmlToData.CXmlToDataSet(jxml);

            return ds;
        }

 public static string GetDataSetFromWebServiceByXmlDocument(string serviceUrl)
    {
        string webserviceUrl = serviceUrl;
        string charSet = "utf-8";
        try
        {
            string pageContent = GetWebServiceContent(webserviceUrl, charSet);
            return pageContent;
        }
        catch (Exception err)
        {
            Console.WriteLine(err.ToString());
            return err.ToString();
        }

    }

    public static string GetWebServiceContent(string webserviceUrl, string charset)
    {
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(webserviceUrl);
        request.Method = "GET";
        request.Timeout = 60000;
        HttpWebResponse response = request.GetResponse() as HttpWebResponse;
        Stream streamReceive = response.GetResponseStream();
        Encoding encoding = Encoding.Default;
        if (!string.IsNullOrEmpty(charset) && Encoding.GetEncoding(charset) != Encoding.Default)
        {
            encoding = Encoding.GetEncoding(charset);
        }

        StreamReader streamReader = new StreamReader(streamReceive, encoding);

        return streamReader.ReadToEnd();
    }
        #endregion