这个例子要把bookstore.xml文件增加一条book记录
1 bookstore.xml
<?xml version="1.0" encoding="gb2312"?>
<bookstore>
<book genre="love" ISBN="1234123">
<title>who am i </title>
<author>who</author>
<price>999</price>
</book>
</bookstore>
2 bookstore.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
namespace toxml
{
public class ToXml
{
public static void Main(string[] args)
{
//实例化一个XmlDocument对象
XmlDocument xmlDoc = new XmlDocument();
//实例对象读取要写入的XML文件
xmlDoc.Load("bookstore.xml");
//查找<bookstore>
XmlNode root = xmlDoc.SelectSingleNode("bookstore");
//创建一个<book>节点
XmlElement xe1 = xmlDoc.CreateElement("book");
//设置该节点genre属性
xe1.SetAttribute("leixing", "music");
//设置该节点ISBN属性
xe1.SetAttribute("ISBN", "56756");
