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NTP是网络时间协议(Network Time Protocol),它是用来同步网络中各个计算机的时间的协议。 局域网不能连接Internet,可以设置一台计算机为NTP服务器。
全局变量: //Timer System.Timers.Timer timer = new System.Timers.Timer(); //IP private string ipAddress; //时间间隔 private int timeInterval; //创建bat文件路径,如果存在,直接覆盖 private string filePath = System.Environment.CurrentDirectory + @"\timesync.bat"; 页面Load方法: private void FrmMain_Load(object sender,EventArgs e) { //运行标志隐藏 picRun.Visible = false; } Run/Abort按钮点击事件: private void btnRunAbort_Click(object sender,EventArgs e) { //IP ipAddress = txtIP.Text.Trim(); //Time Interval timeInterval = Convert.ToInt32(txtTimeInterval.Text); if (btnRunAbort.Text.Equals("开始同步")) { this.RunTimer(); } else if (btnRunAbort.Text.Equals("停止同步")) { //定时器停止 timer.Stop(); timer = new System.Timers.Timer(); MessageBox.Show("停止同步成功","提示"); //运行标志隐藏 picRun.Visible = false; btnRunAbort.Text = "开始同步"; } } 开始同步执行方法: public void RunTimer() { //创建bat文件 FileStream fs = new FileStream(filePath, FileMode.Create,FileAccess.Write); StreamWriter sw = new StreamWriter(fs); sw.WriteLine(string.Format(@"net time \\{0} /set /yes",ipAddress)); sw.Close(); fs.Close(); try { //执行时间超过10秒,强制结束 if (!CallWithTimeOut(CommonRun,10000)) { MessageBox.Show("服务器异常!","提示"); return; } //服务器地址异常 if (StringRun().EndsWith(@"/yes")) { MessageBox.Show("服务器异常!","提示"); return; } MessageBox.Show("开始同步成功!","提示"); //BeginInvoke SetPBState(true , "停止同步"); } catch (Exception ex) { MessageBox.Show("服务器异常!","提示"); return; } //timer定时器执行时间同步 timer.Elapsed += new System.ElapsedEventHandle(TimerRun); timer.Enabled = true; timer.Interval = Convert.ToInt32(txtTimeInterval.Text) * 1000; timer.Start(); } 时间同步,返回执行bat输出: private string StringRun() { ProcessStartInfo pro = new ProcessStartInfo("cmd.exe"); pro.UseShellExecute = false; pro.RedirectStandardOutput = true; pro.RedirectStandardError = true; pro.CreateNoWindow = true; pro.FileName = filePath; pro.WorkingDirectory = System.Environment.CurrentDirectory; Process proc = new Process.Start(pro); StreamReader sOutput = proc.StandardOutput; proc.Close(); string sJudge = sOutput.ReadToEnd().Trim(); sOutput.Close(); return sJudge; } 时间同步: private void CommonRun() { ProcessStartInfo pro = new ProcessStartInfo("cmd.exe"); pro.UseShellExecute = false; pro.RedirectStandardOutput = true; pro.RedirectStandardError = true; pro.CreateNoWindow = true; pro.FileName = filePath; pro.WorkingDirectory = System.Environment.CurrentDirectory; Process proc = new Process.Start(pro); StreamReader sOutput = proc.StandardOutput; proc.Close(); string sJudge = sOutput.ReadToEnd().Trim(); sOutput.Close(); } timer定时器时间同步: private void TimerRun(object source , System.Timers.ElapsedEventArgs e) { ProcessStartInfo pro = new ProcessStartInfo("cmd.exe"); pro.UseShellExecute = false; pro.RedirectStandardOutput = true; pro.RedirectStandardError = true; pro.CreateNoWindow = true; pro.FileName = filePath; pro.WorkingDirectory = System.Environment.CurrentDirectory; Process proc = new Process.Start(pro); StreamReader sOutput = proc.StandardOutput; proc.Close(); string sJudge = sOutput.ReadToEnd().Trim(); sOutput.Close(); } deletegate InvokeRequired: delegate void DelegatePBUpdate(bool b , string btnText); public void SetPBState(bool b , string btnText) { if (this.InvokeRequired) { this.BeginInvoke(new DelegatePBUpdate(SetPBState), new object[] {b , btnText}); } else { picRun.Visible = true; btnRunAbort.Text = "停止同步"; } } 方法执行时间超过设定值,强制结束: static bool CallWithTimeout(Action action, int timeoutMilliseconds) { Thread threadToKill = null; Action wrappedAction = () => { threadToKill = Thread.CurrentThread; action(); } IAsyncResult result = wrappedAction.BeginInvoke(null, null); if (result.AsyncWaitHandle.WaitOne(timeoutMilliseconds)) [ wrappedAction.EndInvoke(result); return true; ] else { threadToKill.Abort(); return false; } }
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