C# 读写 XML

引用：http://www.cnblogs.com/xugang/archive/2010/04/17/1714199.html

IPAddress.xml 文件如下：

<?xml version="1.0" encoding="utf-8"?>
<IP>
<IPAddress>192.168.0.15</IPAddress>
</IP>

在 Form 窗体(读取XML配置.Designer.cs)中有如下控件：

代码

private System.Windows.Forms.Button button1;//“读取”按钮
private System.Windows.Forms.Button button2; //“修改”按钮
private System.Windows.Forms.TextBox textBox1;// 用于显示和修改IP地址
private System.Windows.Forms.Label label1; // 显示“IP地址：”
private System.Windows.Forms.Button button3; // “保存”按钮




读取XML配置.cs 文件如下：

按 Ctrl+C 复制代码
代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
//myself
using System.Xml;

namespace CS_Test
{
public partial class 读取XML配置 : Form
{
public 读取XML配置()
{
InitializeComponent();
}

XmlDocument doc = null;
XmlNodeList nodeList = null;
string path =null;
//读取
private void button1_Click(object sender, EventArgs e)
{
doc = new XmlDocument();
//读取文件地址
path = Application.StartupPath.ToString();
//MessageBox.Show(path);
int n = path.LastIndexOf("bin\\Debug");
path = path.Substring(0, n);
doc.Load((path + "IPAddress.xml"));
MessageBox.Show(path + "IPAddress.xml");

if (doc != null)
{
nodeList = doc.GetElementsByTagName("IPAddress");
textBox1.Text =
nodeList[0].FirstChild.Value.ToString();
}
}
//修改
private void button2_Click(object sender, EventArgs e)
{
textBox1.ReadOnly = false;
}
//保存
private void button3_Click(object sender, EventArgs e)
{
string newIP = textBox1.Text.ToString();
if (nodeList != null)
{
if (textBox1.Text.Trim() != "")
{
//通过根节点创建新元素
XmlNode n = doc.CreateTextNode(textBox1.Text.Trim());
//通过父节点替换子节点
nodeList[0].ReplaceChild(n,nodeList[0].FirstChild);
doc.Save(path + "IPAddress.xml");
MessageBox.Show("IP地址修改成功！");
textBox1.ReadOnly = true;
}
}
}
}
class ProgramXML
{
static void Main(string[] args)
{
Application.Run(new 读取XML配置());
}
}
}
按 Ctrl+C 复制代码