asp.net读取xml接口

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//发送获取xml请求
public static string SentRequest(String url)
{
HttpWebRequest req = WebRequest.CreateHttp(url);
req.Method = "GET";
HttpWebResponse resp = req.GetResponse() as HttpWebResponse;
Stream stream = resp.GetResponseStream();
StreamReader reader = new StreamReader(stream, Encoding.GetEncoding(resp.CharacterSet));
String json = reader.ReadToEnd();
stream.Close();
return json;
}
//获取xml转化格式
public static string GetXmlStr(string url)
{
string jsonstr = SentRequest(url); string json1 = jsonstr.Replace("<", "<");
string json2 = json1.Replace(">", ">"); return json2;
}

string strXml = WebService.GetXmlStr(url);
List<Model> ls = new List<Model>();
if (strXml.Contains("系统标识错误"))
{
ls = null;
}
else
{
XmlDocument xx = new XmlDocument();
xx.LoadXml(strXml); XmlNodeList xxlist = xx.GetElementsByTagName("xkxx"); foreach (XmlNode xxNode in xxlist)
{
Model model = new Model(); XmlNodeList childlist = xxNode.ChildNodes; model .name= childlist[].InnerText; ls.Add(model);
} ViewBag.UserModel= ls;
}