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：

        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