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

<PersonF xmlns="" Name="(test)work hard work smart!">

  <person Name="Person1">

    <ID>1</ID>

    <Name>XiaoA</Name>

    <Age>59</Age>

  </person>

  <person Name="Person2">

    <ID>2</ID>

    <Name>XiaoB</Name>

    <Age>29</Age>

  </person>

  <person Name="Person3">

    <ID>3</ID>

    <Name>XiaoC</Name>

    <Age>103</Age>

  </person>

  <person Name="Person4">

    <ID>4</ID>

    <Name>XiaoD</Name>

    <Age>59</Age>

  </person>

</PersonF>

        public  void TestXML()

        {

            XmlDocument doc = new XmlDocument();

            string path = "http://www.cnblogs.com/MyDocument/Person.xml";

            try

            {

                //doc.Load(Server.MapPath()

                doc.Load(path);

                //1、读取单个节点的数据

                XmlNode node = doc.SelectSingleNode("PersonF");

                //2、读取多个节点的数据

                XmlNodeList nodeList1 = doc.SelectNodes("PersonF/person");

                //3.1 读取具体节点的具体值 如：属性为Person2的第二个节点Name的InnerText

                XmlNodeList nodeList = doc.DocumentElement.GetElementsByTagName("person");

                foreach (XmlNode node2 in nodeList1) //当然也能用nodeList的值

                {

                    if (node2.Attributes["Name"].InnerText == "Person2")

                    {

                        Console.WriteLine(node2.ChildNodes[1].InnerText);

                    }

                }

                //3.2 读取ID为2所在的节点第二个子节点Name的InnerText

                XmlNode node3 = doc.SelectSingleNode("PersonF/person[ID=2]");

                string strNode3 = node3.ChildNodes[1].InnerText;

                //3.3利用下面的方法可以找到ID为2的节点

                XmlNodeList nodeList2 = doc.SelectNodes("//person//ID");

                XmlNode node4 = null;

                foreach (XmlNode node5 in nodeList2)

                {

                    if (node5.InnerText == "2")

                    {

                        node4 = node5;

                        break;

                    }

                }

                Console.WriteLine(node4.InnerText);

                //4、读取节点的属性

                string Name = node.Attributes["Name"].InnerText;

                //5 修改节点的属性

                node.Attributes["Name"].InnerText = "work hard work smart!";

                doc.Save(path);

                //6 添加自定义的节点

                XmlTextReader reader = new XmlTextReader(path);

                XmlElement root = doc.DocumentElement;//获取根节点

                XmlElement tagOuter = doc.CreateElement("person");

                //设置节点属性

                tagOuter.SetAttribute("Name", "Person5");

                XmlElement tagIN_Name = doc.CreateElement("Name");

                XmlElement tagIN_ID = doc.CreateElement("ID");

                tagIN_Name.InnerText = "work hard work smart!";

                tagIN_ID.InnerText = "32";

                tagOuter.AppendChild(tagIN_Name);

                tagOuter.AppendChild(tagIN_ID);

                root.AppendChild(tagOuter);//添加tagOuter到XML文件的最后

                reader.Close();

                doc.Save(path);

            }

            catch (System.Exception e)

            {

                throw new Exception(e.Message);

            }

        }