C#XML操作

 

using System.Xml;

namespace XML读取
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        string userName = "";
        string pwd = "";
        bool valid = false;
        private void label1_Click(object sender, EventArgs e)
        {
            XmlDocument myXml = new XmlDocument();
            myXml.Load("user.xml");
            XmlNode users = myXml.DocumentElement;
            foreach (XmlNode node in users.ChildNodes) 
            {
                if (node.Name == "user") 
                {
                    foreach (XmlNode user in node.ChildNodes) 
                    {
                        switch (user.Name) 
                        {
                            case "userName":
                                userName = user.InnerText;
                                break;
                            case "userPasw":
                                pwd = user.InnerText;
                                break;
                        }
                        if ((userName == txtName.Text.Trim()) && (pwd == txtPwd.Text.Trim())) 
                        {
                            valid = true;
                        }
                    }
                }
            }
            if (valid == true)
            {
                MessageBox.Show("登录成功！");
            }
            else 
            {
                MessageBox.Show("登录失败！");
            }
        }
    }

 

 

XML文件：

<?xml version="1.0" encoding="utf-8"?>
<users>
 <user id="1">
  <userName>cxf</userName>
  <userPasw>001</userPasw>
 </user>

 <user id="2">
  <userName>1233</userName>
  <userPasw>123</userPasw>
 </user>
</users>