XML读写演示程序(2)
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using System.Xml;
using System.IO;
namespace 读写xml
{
public partial class Form1 : Form
{
String xmlPath = Application.StartupPath + "\\demo.xml";
XmlDocument xmlDoc = new XmlDocument();
public Form1()
{
InitializeComponent();
}
******* void button2_Click(object sender, EventArgs e)
{
xmlDoc.Load(xmlPath);
XmlNode root = xmlDoc.SelectSingleNode("bookstore");//查找<bookstore>
XmlElement xe1 = xmlDoc.CreateElement("book");//创建一个<book>节点
xe1.SetAttribute("genre", "李赞红");//设置该节点genre属性
xe1.SetAttribute("ISBN", "2-3631-4");//设置该节点ISBN属性
XmlElement xesub1 = xmlDoc.CreateElement("title");
xesub1.InnerText = "CS从入门到精通";//设置文本节点
xe1.AppendChild(xesub1);//添加到<book>节点中
XmlElement xesub2 = xmlDoc.CreateElement("author");
xesub2.InnerText = "候捷";
xe1.AppendChild(xesub2);
XmlElement xesub3 = xmlDoc.CreateElement("price");
xesub3.InnerText = "58.3";
xe1.AppendChild(xesub3);
root.AppendChild(xe1);//添加到<bookstore>节点中
xmlDoc.Save(xmlPath);
webBrowser1.Navigate(xmlPath);
}
******* void button3_Click(object sender, EventArgs e)
{
File.Copy(Application.StartupPath + "\\demo1.xml", xmlPath,true);
webBrowser1.Navigate(xmlPath);
}
******* void button4_Click(object sender, EventArgs e)
{
//修改节点属性
xmlDoc.Load(xmlPath);
XmlNodeList nodeList = xmlDoc.SelectSingleNode("bookstore").ChildNodes;//获取bookstore节点的所有子节点
foreach (XmlNode xn in nodeList)//遍历所有子节点
{
XmlElement xe = (XmlElement)xn;//将子节点类型转换为XmlElement类型
if (xe.GetAttribute("genre") == "李赞红")//如果genre属性值为“李赞红”
{
xe.SetAttribute("genre", "update李赞红");//则修改该属性为“update李赞红”
XmlNodeList nls = xe.ChildNodes;//继续获取xe子节点的所有子节点
foreach (XmlNode xn1 in nls)//遍历
{
XmlElement xe2 = (XmlElement)xn1;//转换类型
if (xe2.Name == "author")//如果找到
{
xe2.InnerText = "亚胜";//则修改
break;//找到退出来就可以了
}
}
break;
}
}
xmlDoc.Save(xmlPath);//保存。
webBrowser1.Navigate(xmlPath);
}
******* void button5_Click(object sender, EventArgs e)
{
xmlDoc.Load(xmlPath);
XmlNodeList xnl=xmlDoc.SelectSingleNode("bookstore").ChildNodes;
foreach(XmlNode xn in xnl)
{
XmlElement xe=(XmlElement)xn;
if (xe.GetAttribute("genre") == "fantasy")
{
xe.RemoveAttribute("genre");//删除genre属性
}
else if (xe.GetAttribute("genre") == "update李赞红")
{
xe.RemoveAll();//删除该节点的全部内容
}
}
xmlDoc.Save(xmlPath);
webBrowser1.Navigate(xmlPath);
}
******* void button6_Click(object sender, EventArgs e)
{
String str1 = null;
XmlDocument myxml = new XmlDocument();
myxml.Load(xmlPath);
XmlNode xn = myxml.SelectSingleNode("bookstore");
XmlNodeList xnl = xn.ChildNodes;
foreach (XmlNode xnf in xnl)
{
XmlElement xe = (XmlElement)xnf;
str1 += xe.GetAttribute("genre");
str1 += Environment.NewLine;
str1 += xe.GetAttribute("ISBN");
str1 += Environment.NewLine;
XmlNodeList xnf1 = xe.ChildNodes;
foreach (XmlNode xn2 in xnf1)
{
str1 += xn2.InnerText;
str1 += Environment.NewLine;
}
}
MessageBox.Show(str1);
}
******* void Form1_Load(object sender, EventArgs e)
{
webBrowser1.Navigate(xmlPath);
}
}
}
