//xml -解析
        private void xmldode()
        {
            XmlDocument doc = new XmlDocument();
            String stpa = "XMLFile1.xml";  //解析当前目录xml文件
            doc.Load(stpa);
            XmlNodeList list = doc.SelectNodes("bookstore/nihao/title");
            foreach (XmlNode node in list)
            {
                oulog(node.Name + ":" + node.InnerText);
                /***
                 *输出为元素+实例
                 * 
                 * **/
            }

        }