简单读写XML文件

         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

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());
        }
    }
}

本文转自钢钢博客园博客，原文链接：http://www.cnblogs.com/xugang/archive/2010/04/17/1714199.html，如需转载请自行联系原作者