浅用xml

      用一个xml文件来存放一些你要修改的数据。比如你要修改时间Time。ShowDialog()的时候，将修改的值通过xml文件的方式保存到程序的程序集目录中。当你在一次修改的时候就会保留上一次的修改结果。代码如下：

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

namespace TestXml
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        void createXml()
        {
            XmlDocument xmldoc = new XmlDocument();
            //加入XML的声明段落
            XmlNode xmlnode = xmldoc.CreateNode(XmlNodeType.XmlDeclaration, "", "");
            xmldoc.AppendChild(xmlnode);
            //加入一个根元素
            XmlElement xmlelem = xmldoc.CreateElement("", "Time", "");
            xmlelem.InnerText = "20";
            xmldoc.AppendChild(xmlelem);
            xmldoc.Save(Directory.CreateDirectory(Directory.GetCurrentDirectory()) + "//t.xml");

        }
        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                XmlDocument xmldoc = new XmlDocument();
                xmldoc.Load(Application.StartupPath + "//t.xml");
                XmlNode node = xmldoc.SelectSingleNode("Time");
                this.textBox1.Text = node.InnerText;
            }
            catch
            {
                createXml();
            }
        }
        string t = Directory.GetCurrentDirectory();
        private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                XmlDocument xmldoc = new XmlDocument();
                xmldoc.Load(Application.StartupPath + "//t.xml");
                XmlNode node = xmldoc.SelectSingleNode("Time");
                node.InnerText = this.textBox1.Text;
                xmldoc.Save(Directory.GetCurrentDirectory() + "//t.xml");
            }
            catch
            {
                this.createXml();
            }
        }
    }
}