C#调用web service返回字符串

C#通过Get方式调用Web Service返回一个字符串，可以带参数访问

public string getServiceResult(string serviceUrl) {
	HttpWebRequest HttpWReq;
	HttpWebResponse HttpWResp;
	HttpWReq = (HttpWebRequest)WebRequest.Create(serviceUrl);
	HttpWReq.Method = "GET";
	HttpWResp = (HttpWebResponse)HttpWReq.GetResponse();
	if (HttpWResp.StatusCode == HttpStatusCode.OK)
	{
		//Consume webservice with basic XML reading, assumes it returns (one) string
		XmlReader reader = XmlReader.Create(HttpWResp.GetResponseStream());
		while (reader.Read())
		{
			reader.MoveToFirstAttribute();
			if (reader.NodeType == XmlNodeType.Text)
			{
				return reader.Value;
			}
		}
		return String.Empty;
	}
	else
	{
		throw new Exception("Error on remote IP to Country service: "+ HttpWResp.StatusCode.ToString());
	}
}