using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Xml;
using System.IO;
namespace Form
{
public partial class Form4 : Form
{
public Form4()
{
InitializeComponent();
}
protected override void OnShown(EventArgs e)
{
base.OnShown(e);
this.button1_Click(null, null);
}
private void button1_Click(object sender, EventArgs e)
{
string data = this.textBox1.Text.Trim();
string fileName = Path.Combine(Application.StartupPath, "data.xml");
XmlDocument doc = new XmlDocument();
//加载Xml数据
try
{
doc.Load(fileName);
}
catch (Exception ex)
{
doc = this.ReCreateXmlFile(fileName);
}
if (!doc.HasChildNodes)
{
MessageBox.Show("Xml文件加载发生错误！");
return;
}
XmlNode rootNode = doc.GetElementsByTagName("ROOT")[0];
//将新数据加入Xml中
if (!string.IsNullOrEmpty(data))
{
//新建节点
XmlNode childNode = doc.CreateNode(XmlNodeType.Element, "DATA", "");
childNode.InnerText = data;
rootNode.AppendChild(childNode);
//保存到文件
doc.Save(fileName);
}
this.comboBox1.Items.Clear();
//将Xml节点数据加载到ComboBox
foreach (XmlNode child in rootNode.ChildNodes)
{
this.comboBox1.Items.Add(child.InnerText);
}
}
///
/// 新创建文件
///
///
private XmlDocument ReCreateXmlFile(string fileName)
{
if (File.Exists(fileName)) File.Delete(fileName);
using (FileStream fs = File.Create(fileName))
{
XmlDocument doc = new XmlDocument();
XmlDeclaration decl = doc.CreateXmlDeclaration("1.0", "utf-8", "");
doc.AppendChild(decl);
XmlElement rootNode = doc.CreateElement("ROOT");
doc.AppendChild(rootNode);
doc.Save(fs);
return doc;
}
}
}
}
