判断试用版软件是否过试用期代码,CSharp代码库,德仔网

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【CSharp】判断试用版软件是否过试用期
作者:Dezai.CN / 发布于2013/7/16/ 695

	//先写一个判断是否过期的类

	class Confirm
	 {
	 public static string remaindays;
	 private static string TryEndDate = "2011-10-9";//设定截止试用期
	 private static string NetErrorDate = "2500-1-1 0:00:00";//网络异常时，自动设置过期日期
	 public static string confirmsoft()
	 {
	 //先判断软件是否过期
	 DateTime dt1 = DateTime.Parse(TryEndDate);//设定过期时间为2008-11-27
	 DateTime dt2 = getServerTime().Date;//取服务器时间
	 //DateTime dt2 = DateTime.Now.Date;// 取客户本机时间
	 TimeSpan ts = dt1.Subtract(dt2);

	 if (dt2.ToString() == NetErrorDate)
	 {
	 return "0";//网络异常
	 }

	 if (ts.TotalDays >= 0)//如果在试用期内
	 {
	 remaindays = ts.TotalDays.ToString();
	 return "1";//正常试用期内
	 }
	 else
	 {
	 return "2";//已经过了试用期
	 }
	 }
	 public static DateTime getServerTime()
	 {
	 string[,] 时间服务器 = new string[14, 2];
	 int[] 搜索顺序 = new int[] { 3, 2, 4, 8, 9, 6, 11, 5, 10, 0, 1, 7, 12 };
	 时间服务器[0, 0] = "time-a.nist.gov";
	 时间服务器[0, 1] = "129.6.15.28";
	 时间服务器[1, 0] = "time-b.nist.gov";
	 时间服务器[1, 1] = "129.6.15.29";
	 时间服务器[2, 0] = "time-a.timefreq.bldrdoc.gov";
	 时间服务器[2, 1] = "132.163.4.101";
	 时间服务器[3, 0] = "time-b.timefreq.bldrdoc.gov";
	 时间服务器[3, 1] = "132.163.4.102";
	 时间服务器[4, 0] = "time-c.timefreq.bldrdoc.gov";
	 时间服务器[4, 1] = "132.163.4.103";
	 时间服务器[5, 0] = "utcnist.colorado.edu";
	 时间服务器[5, 1] = "128.138.140.44";
	 时间服务器[6, 0] = "time.nist.gov";
	 时间服务器[6, 1] = "192.43.244.18";
	 时间服务器[7, 0] = "time-nw.nist.gov";
	 时间服务器[7, 1] = "131.107.1.10";
	 时间服务器[8, 0] = "nist1.symmetricom.com";
	 时间服务器[8, 1] = "69.25.96.13";
	 时间服务器[9, 0] = "nist1-dc.glassey.com";
	 时间服务器[9, 1] = "216.200.93.8";
	 时间服务器[10, 0] = "nist1-ny.glassey.com";
	 时间服务器[10, 1] = "208.184.49.9";
	 时间服务器[11, 0] = "nist1-sj.glassey.com";
	 时间服务器[11, 1] = "207.126.98.204";
	 时间服务器[12, 0] = "nist1.aol-ca.truetime.com";
	 时间服务器[12, 1] = "207.200.81.113";
	 时间服务器[13, 0] = "nist1.aol-va.truetime.com";
	 时间服务器[13, 1] = "64.236.96.53";
	 int portNum = 13;
	 string hostName;
	 byte[] bytes = new byte[1024];
	 int bytesRead = 0;
	 System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient();
	 for (int i = 0; i < 13; i++)
	 {
	 hostName = 时间服务器[搜索顺序[i], 1];
	 try
	 {
	 client.Connect(hostName, portNum);
	 System.Net.Sockets.NetworkStream ns = client.GetStream();
	 bytesRead = ns.Read(bytes, 0, bytes.Length);
	 client.Close();
	 break;
	 }
	 catch (Exception)
	 {
	 }
	 }

	 DateTime dt = new DateTime();
	 //whbmemo:如果用户没有连接网络，则返回2500-01-01，代表一个过期时间
	 try
	 {
	 char[] sp = new char[1];
	 sp[0] = ' ';

	 string str1;
	 str1 = System.Text.Encoding.ASCII.GetString(bytes, 0, bytesRead);

	 string[] s;
	 s = str1.Split(sp);

	 dt = System.DateTime.Parse(s[1] + " " + s[2]);//标准时间
	 dt = dt.AddHours(8);//转换成北京时间
	 }
	 catch(Exception)
	 {
	 dt = DateTime.Parse(NetErrorDate);
	 }

	 return dt;
	 }
	 }

	//引用方法

	private void Form1_Load(object sender, EventArgs e)
	 {
	 switch (Confirm.confirmsoft())
	 {
	 case "0":
	 MessageBox.Show("系统检测到您未连接网络，无法正常试用本软件！请联系软件发行者。QQ:124257207 TEL:13793161549", "系统提示！");
	 Environment.Exit(0);
	 break;
	 case "1":
	 MessageBox.Show("软件试用剩余期限为：" + Confirm.remaindays + "天，试用期间功能不受任何限制！.", "系统提示！");
	 break;
	 case "2":
	 MessageBox.Show("软件已经过期，请联系软件发行者。QQ:124257207 TEL:13793161549", "软件试用期结束！");
	 Environment.Exit(0);
	 break;
	 }

	 }
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