private void button1_Click(object sender, RoutedEventArgs e)

        {

            XmlTextWriter writer = new XmlTextWriter("MyInfo.xml", System.Text.Encoding.UTF8);

            //使用自动缩进便于阅读

            writer.Formatting = Formatting.Indented;

            //XML声明

            writer.WriteStartDocument();

            //书写根元素

            writer.WriteStartElement("Root");

            //开始一个元素

            writer.WriteStartElement("Item ");

            //向先前创建的元素中添加一个属性

            writer.WriteAttributeString("id", "");

            //添加子元素
            writer.WriteElementString("X", "x1");

            writer.WriteElementString("Y", "y1");

            writer.WriteElementString("Z", "z1");

            //关闭item元素

            writer.WriteEndElement(); // 关闭元素

//在节点间添加一些空

            writer.Close();

        }

        //读取xml数据

        private void button2_Click(object sender, RoutedEventArgs e)

        {

            string ExePath = AppDomain.CurrentDomain.SetupInformation.ApplicationBase + "\\MyInfo.xml";

            try

            {

                // 1.创建一个XmlDocument类的对象

                XmlDocument doc = new XmlDocument();

                // 2.把你想要读取的xml文档加载进来

                doc.Load(ExePath);

                // 3.读取你指定的节点

                XmlNode xn = doc.SelectSingleNode("Root");

                XmlNodeList lis = xn.ChildNodes;

                // 4.取节点中的值

                String str = lis[].InnerText;

                MessageBox.Show(str);

            }

            catch

            {

                MessageBox.Show("配置文件存在异常！");

            }

        }

        //插入xml数据

        private void button3_Click(object sender, RoutedEventArgs e)

        {

            XmlDocument xmlDoc = new XmlDocument();

            xmlDoc.Load("MyInfo.xml");

            XmlNode root = xmlDoc.SelectSingleNode("Root");//查找父节点

            XmlElement xe1 = xmlDoc.CreateElement("Item");//创建一个子节点

            xe1.SetAttribute("id", "");//设置该节点id属性

            XmlElement xesub1 = xmlDoc.CreateElement("X");

            xesub1.InnerText = "x3";//设置文本节点

            xe1.AppendChild(xesub1);//添加到<MyInfo>节点中

            XmlElement xesub2 = xmlDoc.CreateElement("Y");

            xesub2.InnerText = "y3";

            xe1.AppendChild(xesub2);

            XmlElement xesub3 = xmlDoc.CreateElement("Z");

            xesub3.InnerText = "z3";

            xe1.AppendChild(xesub3);

            root.AppendChild(xe1);//添加到<bookstore>节点中

            xmlDoc.Save("MyInfo.xml");

        }

        //删除xml数据

        private void button4_Click(object sender, RoutedEventArgs e)

        {

            XmlDocument xmlDoc = new XmlDocument();

            xmlDoc.Load("MyInfo.xml");

            XmlNode xmlRoot = xmlDoc.SelectSingleNode("Root");

            XmlNodeList xnl = xmlRoot.ChildNodes;

            foreach (XmlNode xn in xnl)

            {

                XmlElement xe = (XmlElement)xn;

                if (xe.GetAttribute("id") == "")

                {

                    xmlRoot.RemoveChild(xn);

                }

            }

            xmlDoc.Save("MyInfo.xml");

        }

        //修改xml数据

        private void button5_Click(object sender, RoutedEventArgs e)

        {
        }

        //显示xml数据

        private void button6_Click(object sender, RoutedEventArgs e)

        {

            XmlDocument xmlDoc = new XmlDocument();

            xmlDoc.Load("MyInfo.xml");

            XmlNode xn = xmlDoc.SelectSingleNode("Root");
            XmlNodeList xnl = xn.ChildNodes;
            string str = "";

            string str1 = "";

            string str2 = "";

            foreach (XmlNode xnf in xnl)
            {

                XmlElement xe = (XmlElement)xnf;

                XmlNodeList xnf1 = xe.ChildNodes;

                str = xnf1[].InnerText;

                str1 = xnf1[].InnerText;

                str2 = xnf1[].InnerText;

                MessageBox.Show("X:" + str + "\n" + "Y:" + str1 + "\n" + "Z:" + str2);

            }

            MessageBox.Show("X:" + str + "\n" + "Y:" + str1 + "\n" + "Z:"+str2);

        }