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：

http://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();
}
}
}