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;
//需要添加的
using System.Xml;
using System.IO;
namespace xml
{
public partial class Form1
: Form
{
public Form1()
{
InitializeComponent();
}
#region 加载窗体，加载数据
private void Form1_Load(object sender, EventArgs
e)
{
getFromXml();
}
#endregion
//变量声明
string username;
string password;
string path = @"config.xml";
//保存设置
private void button1_Click(object sender,
EventArgs e)
{
username =
textBox1.Text;
password =
textBox2.Text;
saveToXml(username,password);
MessageBox.Show("保存成功");
}
#region 把数据保存至xml文件
/// <summary>
/// 保存至xml文件
/// </summary>
/// <param
name="username">账号</param>
/// <param
name="password">密码</param>
private void saveToXml(string username,string
password)
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(path);
XmlNode
node;
node =
xmlDoc.SelectSingleNode("config/username");
if (node
== null)
{
XmlElement n =
xmlDoc.CreateElement("username");
n.InnerText = username;
xmlDoc.SelectSingleNode("config").AppendChild(n);
}
else
{
node.InnerText =
username;
}
node =
xmlDoc.SelectSingleNode("config/password");
if (node
== null)
{
XmlElement n =
xmlDoc.CreateElement("password");
n.InnerText = password;
xmlDoc.SelectSingleNode("config").AppendChild(n);
}
else
{
node.InnerText =
password;
}
xmlDoc.Save(path);
}
#endregion
#region 从xml获得数据，并加载
private void getFromXml()
{
//获得数据
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(path);
XmlNode
node;
node =
xmlDoc.SelectSingleNode("config/username");
username =
node.InnerText;
node =
xmlDoc.SelectSingleNode("config/password");
password =
node.InnerText;
//加载数据
textBox1.Text=username;
textBox2.Text=password;
}
#endregion
}
}
=======================
<?xml version="1.0"
encoding="utf-8"?>
<config>
<username>king</username>
<password>123456</password>
</config>
如果config.xml格式正确
会提示
缺少根元素
更改一致就可以了
加载中…