C#XML学习文件写入

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml;
using System.Xml.Linq;

namespace Xml读写操作
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            #region 通过XmlDocument实现Xml文件写入
            //1.在内存中构建一个Dom模型
            XmlDocument xmldoc = new XmlDocument();
            //为文档增加说明
            XmlDeclaration xmldec = xmldoc.CreateXmlDeclaration("1.0", "utf-8", "yes");
            xmldoc.AppendChild(xmldec);
            //为文档增加根元素
            XmlElement xmlroot = xmldoc.CreateElement("School");
            xmldoc.AppendChild(xmlroot);
            //为根元素中增加子元素
            XmlElement xmlclass = xmldoc.CreateElement("class");
            XmlAttribute xmlatt = xmldoc.CreateAttribute("id");
            xmlatt.Value = "01";
            xmlclass.Attributes.Append(xmlatt);
            xmlroot.AppendChild(xmlclass);

            XmlElement xmlstu = xmldoc.CreateElement("student");
            XmlAttribute xmlattstu = xmldoc.CreateAttribute("sid");
            xmlattstu.Value = "s011";
            xmlstu.Attributes.Append(xmlattstu);
            xmlclass.AppendChild(xmlstu);

            XmlElement xmlname = xmldoc.CreateElement("name");
            //让xml节点中间显示内容
            xmlname.InnerText = "小明";
            xmlstu.AppendChild(xmlname);

            XmlElement xmlage = xmldoc.CreateElement("age");
            xmlage.InnerText = "20";
            xmlstu.AppendChild(xmlage);


            //2.将该Dom对象写入到Xml文件中
            xmldoc.Save("wSchool.xml");
            MessageBox.Show("OK");
            #endregion

            #region 将List集合写入到Xml文件中
            List<Person> list = new List<Person>();
            list.Add(new Person() { Name = "小明", age = "20" });
            list.Add(new Person() { Name = "小红", age = "21" });
            list.Add(new Person() { Name = "小王", age = "22" });
            list.Add(new Person() { Name = "小刚", age = "23" });

            //1.创建一个dom对象
            XmlDocument xmldoc = new XmlDocument();
            XmlDeclaration xmldec = xmldoc.CreateXmlDeclaration("1.0", "utf-8", "no");
            xmldoc.AppendChild(xmldec);
            XmlElement xmlroot = xmldoc.CreateElement("List");

            //xmldoc.AppendChild(xmlroot);

            //循环创建Person节点
            for (int i = 0; i < list.Count; i++)
            {
                //创建一个Person元素
                XmlElement xmlPerson = xmldoc.CreateElement("Person");
                XmlAttribute xmlattrid = xmldoc.CreateAttribute("ID");
                xmlattrid.Value = (i + 1).ToString();
                xmlPerson.Attributes.Append(xmlattrid);

                XmlElement xmlname = xmldoc.CreateElement("name");
                xmlname.InnerText = list[i].Name;
                xmlPerson.AppendChild(xmlname);

                XmlElement xmlage = xmldoc.CreateElement("age");
                xmlage.InnerText = list[i].age;
                xmlPerson.AppendChild(xmlage);


                //最后把Person加到根节点下
                xmlroot.AppendChild(xmlPerson);

            }

            //2.将该Dom对象写入到Xml文件中
            xmldoc.Save("Person.xml");
            MessageBox.Show("OK");
            #endregion

            #region 通过Xdocument方式写入Xml文件
            List<Person> list = new List<Person>();
            list.Add(new Person() { Name = "小明", age = "20" });
            list.Add(new Person() { Name = "小红", age = "21" });
            list.Add(new Person() { Name = "小王", age = "22" });
            list.Add(new Person() { Name = "小刚", age = "23" });

            //1.创建一个Dom对象
            XDocument xdoc = new XDocument();
            XDeclaration xdec = new XDeclaration("1.0", "utf-8", "yes");
            xdoc.Declaration = xdec;
            //创建根节点
            XElement xroot = new XElement("List");
           

            //循环List集合创建Person节点
            for (int i = 0; i < list.Count; i++)
            {
                XElement xperson = new XElement("Person");
                xperson.SetAttributeValue("id", (i + 1).ToString());

                xperson.SetElementValue("name", list[i].Name);
                xperson.SetElementValue("age", list[i].age);

                xroot.Add(xperson);
            }

            xdoc.Add(xroot);

            //2.将Dom对象写入Xml文件中
            xdoc.Save("NewPerson.xml");
            MessageBox.Show("OK");
            #endregion
        }
    }


    public class Person
    {
        public string Name { get; set; }

        public string age { get; set; }
    }
}

创建Winform项目 添加按钮为写入XML文件