根据网址(url)获取XML

public XmlDocument GetXMLFromUrl(string strUrl)
{
// 该方法必须设定Encoding编码格式
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(strUrl);
request.Method = "POST";
HttpWebResponse response;
Stream responseStream;
StreamReader reader;
XmlDocument outxml = new XmlDocument();
response = request.GetResponse() as HttpWebResponse;
responseStream = response.GetResponseStream();
reader = new System.IO.StreamReader(responseStream, Encoding.GetEncoding("GBK"));
string srcString = reader.ReadToEnd();
reader.Close();
XmlDocument doc = new XmlDocument();
doc.LoadXml(srcString);
return doc;
}

public XmlDocument GetXMLFromUrl(string strUrl)
{
//方法二
Uri uri = new Uri(strUrl);
System.Net.WebClient wb = new System.Net.WebClient();
wb.Proxy.Credentials = System.Net.CredentialCache.DefaultCredentials;
MemoryStream ms = new MemoryStream(wb.DownloadData(strUrl));
System.Xml.XmlTextReader rdr = new System.Xml.XmlTextReader(ms);
XmlDocument doc = new XmlDocument();
doc.Load(rdr);
return doc;
}

public XmlDocument GetXMLFromUrl(string strUrl)
{
//方法一
XmlDocument doc = new XmlDocument();
doc.Load(strUrl);
return doc;
}