WPF对于xml的简单操作（上）

        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", "1");
            //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[1].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", "3");//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") == "3")
                {
                    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[0].InnerText;
                str1 = xnf1[1].InnerText;
                str2 = xnf1[2].InnerText;
                MessageBox.Show("X:" + str + "\n" + "Y:" + str1 + "\n" + "Z:" + str2);
            }
            MessageBox.Show("X:" + str + "\n" + "Y:" + str1 + "\n" + "Z:"+str2);
        }