<?xml version="1.0" encoding="utf-8" ?>

<config>

  <serv_ip>192.168.0.105</serv_ip>

  <database>test</database>

  <userid>sa</userid>

  <password>123456</password>

</config>

            XmlDocument xmlDoc = new XmlDocument();

            xmlDoc.Load("config.xml");

            XmlNode root = xmlDoc.SelectSingleNode("config");//指向根节点

            XmlNode xn = root.SelectSingleNode("serv_ip");//指向根节点下的serv_ip节点

            string ip = xn.InnerText;//读出里面的值 注意读取的是string 需要类型转换的话自己做

            XmlNode database = root.SelectSingleNode("database");

            string data = database.InnerText;

            XmlNode userid = root.SelectSingleNode("userid");

            string user = userid.InnerText;

            XmlNode password = root.SelectSingleNode("password");

            string pwd = password.InnerText;