引用：
IPAddress.xml 文件如下：
<? xml version="1.0" encoding="utf-8" ?> < IP > < IPAddress > 192.168.0.120 </ 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：
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()); } } }