帮朋友做的限制小孩上网时间软件的源码

昨天帮朋友做一个限制他们家小孩上网时间的软件，觉得很有意义，花了两个小时，很简单，还挺管用，针对只会玩游戏的小孩够用了！呵呵。

下面是源文件下载地址：

https://files.cnblogs.com/mane/WINUSER.zip

XML文件，（应该加密帐号密码的，太麻烦，就算了）

<?xml version="1.0" encoding="utf-8" ?>
<Users>
  <!--记录用户的帐号，密码，已经可以使用的时间-->
  <User name="Admin" pwd="123456" role="管理员" date="2012-07-02">10</User>
  <User name="User" pwd="123456" role="" date="2012-07-02">10</User>
</Users>

操作XML的类 （别见怪，重复利用率是个问题）

using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;//引入XML命名空间

namespace WINUSER
{
    class ControlXML
    {
        private string filePath;

        public ControlXML(string XMLFilePath)
        {
            filePath = XMLFilePath;
        }

        /// <summary>
        /// 获取时间值
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="userPwd"></param>
        /// <returns></returns>
        public string GetValue(string userName, string userPwd)
        {
            string value=""; 
            XmlDocument XMLDoc = new XmlDocument();
            XMLDoc.Load(filePath);//读取XML文档
            XmlNode xn = XMLDoc.SelectSingleNode("Users");
            XmlNodeList xnl = xn.ChildNodes;
            foreach (XmlNode xnf in xnl)
            {
                if (xnf.Name == "User")
                {
                    XmlElement sonData = (XmlElement)xnf;
                    if (sonData.GetAttribute("name") == userName && sonData.GetAttribute("pwd") == userPwd)
                    {
                        value = sonData.InnerText;
                    }
                }
            }
            return value;
        }

        /// <summary>
        /// 获取日期
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="userPwd"></param>
        /// <returns></returns>
        public DateTime GetData(string userName, string userPwd)
        {
            DateTime dt=new DateTime ();
            XmlDocument XMLDoc = new XmlDocument();
            XMLDoc.Load(filePath);//读取XML文档
            XmlNode xn = XMLDoc.SelectSingleNode("Users");
            XmlNodeList xnl = xn.ChildNodes;
            foreach (XmlNode xnf in xnl)
            {
                if (xnf.Name == "User")
                {
                    XmlElement sonData = (XmlElement)xnf;
                    if (sonData.GetAttribute("name") == userName && sonData.GetAttribute("pwd") == userPwd)
                    {
                        dt = Convert.ToDateTime(sonData.GetAttribute("date"));
                    }
                }
            }
            return dt;
        }

        /// <summary>
        /// 获取用户规则
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="userPwd"></param>
        /// <returns></returns>
        public string GetRole(string userName, string userPwd)
        {
            string role = "";
            XmlDocument XMLDoc = new XmlDocument();
            XMLDoc.Load(filePath);//读取XML文档
            XmlNode xn = XMLDoc.SelectSingleNode("Users");
            XmlNodeList xnl = xn.ChildNodes;
            foreach (XmlNode xnf in xnl)
            {
                if (xnf.Name == "User")
                {
                    XmlElement sonData = (XmlElement)xnf;
                    if (sonData.GetAttribute("name") == userName && sonData.GetAttribute("pwd") == userPwd)
                    {
                        role = sonData.GetAttribute("role");
                    }
                }
            }
            return role;
        }

        /// <summary>
        /// 写入日期
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="userPwd"></param>
        public void WriteData(string userName, string userPwd)
        {
            XmlDocument XMLDoc = new XmlDocument();
            XMLDoc.Load(filePath);//读取XML文档
            XmlNode xn = XMLDoc.SelectSingleNode("Users");
            XmlNodeList xnl = xn.ChildNodes;
            foreach (XmlNode xnf in xnl)
            {
                if (xnf.Name == "User")
                {
                    XmlElement sonData = (XmlElement)xnf;
                    if (sonData.GetAttribute("name") == userName && sonData.GetAttribute("pwd") == userPwd)
                    {
                        sonData.SetAttribute("date", DateTime.Now.ToShortDateString());//设置为当前日期
                    }
                }
            }
            XMLDoc.Save(filePath);
        }

        /// <summary>
        /// 写入时间值
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="userPwd"></param>
        public void WriteValue(string userName, string userPwd,string lastTime)
        {
            XmlDocument XMLDoc = new XmlDocument();
            XMLDoc.Load(filePath);//读取XML文档
            XmlNode xn = XMLDoc.SelectSingleNode("Users");
            XmlNodeList xnl = xn.ChildNodes;
            foreach (XmlNode xnf in xnl)
            {
                if (xnf.Name == "User")
                {
                    XmlElement sonData = (XmlElement)xnf;
                    if (sonData.GetAttribute("name") == userName && sonData.GetAttribute("pwd") == userPwd)
                    {
                        sonData.InnerText = lastTime;//设置剩余的时间值
                    }
                }
            }
            XMLDoc.Save(filePath);
        }
    }
}

主要界面（设置为不能在最小化任务栏显示，并且隐藏主窗体，防止关闭，但可以在任务管理器关闭，所有必须禁用任务管理器）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.Win32;


namespace WINUSER
{
    public partial class Main : Form
    {
        public static Main main;
        public Main()
        {
            InitializeComponent();
            main = this;
        }

        /// <summary>
        /// 剩余的时间
        /// </summary>
        public static int lastTime = 14400;

        /// <summary>
        /// 当前登录用户的帐号，密码
        /// </summary>
        public static string userName, userPwd;

        /// <summary>
        /// 初始化
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Main_Load(object sender, EventArgs e)
        {
            //隐藏主窗体，防止用户关闭
            this.Visible = false;
            this.WindowState = FormWindowState.Minimized;

            //设置为开机启动，每次开机都自动运行该程序
            RegistryKey hkml = Registry.LocalMachine;
            RegistryKey runKey = hkml.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Run", true);
            runKey.SetValue("WinUser", Application.StartupPath + "\\WINUSER.exe");
            runKey.Close();

            //打开用户登录
            Login login = new Login();
            login.ShowDialog();
        }


        /// <summary>
        /// 设定计时器
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void timer1_Tick(object sender, EventArgs e)
        {
            lastTime--;
            if (lastTime <= 0)
            {
                //关闭计时器
                timer1.Enabled = false;

                //重新登录
                Login login = new Login();
                login.ShowDialog();
            }

            //保存当前剩余时间
            ControlXML cx = new ControlXML(Application.StartupPath + "\\User.xml");
            cx.WriteValue(userName, userPwd, lastTime.ToString());//设置新的上网时间值
        }
    }
}

登录界面（需要禁用任务管理器）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.Win32;//

namespace WINUSER
{
    public partial class Login : Form
    {
        public Login()
        {
            InitializeComponent();
        }

        /// <summary>
        /// 初始化
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Login_Load(object sender, EventArgs e)
        {
            //作为顶层窗口，和最大化窗口，屏蔽其他窗口
            this.TopMost = true;//顶层窗口
            this.WindowState = FormWindowState.Maximized;//最大化窗口

            //停用任务管理器，删除该注册表即可解除
            RegistryKey r = Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System", true);
            r.SetValue("DisableTaskMgr", "1");  //屏蔽任务管理器 
        }

        /// <summary>
        /// 阻止程序关闭
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Login_FormClosing(object sender, FormClosingEventArgs e)
        {
            //防止意外关闭本窗口
            e.Cancel = true;//防止关闭窗口
        }

        /// <summary>
        /// 登录
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            ControlXML cx = new ControlXML(Application.StartupPath + "\\User.xml");

            //如果用户输入成功登录
            string value = cx.GetValue(comboBox1.Text, textBox1.Text);
            if (value != null && value != "")
            {
                //如果当前日期和保存日期不一致则说明是新的一天，刷新最后一次使用日期和新的上网时间值
                DateTime dt = cx.GetData(comboBox1.Text, textBox1.Text);
                if (DateTime.Now.ToShortDateString() != dt.ToShortDateString())
                {
                    cx.WriteData(comboBox1.Text, textBox1.Text);//设置新的日期值
                    cx.WriteValue(comboBox1.Text, textBox1.Text,"14400");//设置新的上网时间值为4小时
                }
                //获取用户规则如果为管理员则一天都可以上网
                string role = cx.GetRole(comboBox1.Text, textBox1.Text);
                if (role == "管理员")
                {
                    cx.WriteValue(comboBox1.Text, textBox1.Text, "86400");//设置新的上网时间值为24小时
                }
                //获取上网时间值，并关闭本窗口
                Main.lastTime = int.Parse(cx.GetValue(comboBox1.Text, textBox1.Text));
                Main.userName = comboBox1.Text;
                Main.userPwd = textBox1.Text;
                this.Visible = false;

                //打开计时器
                Main .main .timer1.Enabled = true;
                MessageBox.Show("你还有" + Main.lastTime.ToString() + "秒的上网时间可用！");
            }
            else
            {
                MessageBox.Show("密码错误！");
            }
        }

        /// <summary>
        /// 关机
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {
            WindowsExit.ExitWin();
        }
    }
}