正确的方法来暂停System.Timers.Timer？

Question

我在看如何暂停System.Timers.Timer，我无法找出正确的方法来暂停它，而无需重置计时器。

如何暂停它？

Answer 1

我得到了现在，我敢肯定，这不是防弹所以告诉我什么是错的吧...

Public Class ImprovedTimer 
Inherits System.Timers.Timer 

Private _sw As System.Diagnostics.Stopwatch 
Private _paused As Boolean 
Private _originalInterval As Double 
Private _intervalRemaining As Double? 

Public ReadOnly Property IntervalRemaining() As Double? 
    Get 
     Return _intervalRemaining 
    End Get 
End Property 

Public ReadOnly Property Paused() As Boolean 
    Get 
     Return _paused 
    End Get 
End Property 

Public ReadOnly Property OriginalInterval() As Double 
    Get 
     Return _originalInterval 
    End Get 
End Property 

Public Sub Pause() 
    If Me.Enabled Then 
     _intervalRemaining = Me.Interval - _sw.ElapsedMilliseconds 
     _paused = True 
     resetStopWatch(False, False) 
     MyBase.Stop() 
    End If 
End Sub 

Public Sub [Resume]() 
    If _paused Then 
     Me.Interval = If(_intervalRemaining.HasValue, _intervalRemaining.Value, _originalInterval) 
     resetStopWatch(True, False) 
     MyBase.Start() 
    End If 
End Sub 

Public Overloads Property Enabled() As Boolean 
    Get 
     Return MyBase.Enabled 
    End Get 
    Set(ByVal value As Boolean) 
     MyBase.Enabled = value 
     resetStopWatch(MyBase.Enabled, True) 
    End Set 
End Property 

Public Overloads Sub Start() 
    resetStopWatch(True, True) 
    MyBase.Start() 
End Sub 

Public Overloads Sub [Stop]() 
    resetStopWatch(False, True) 
    MyBase.Stop() 
End Sub 

Public Overloads Property Interval() As Double 
    Get 
     Return MyBase.Interval 
    End Get 
    Set(ByVal value As Double) 
     MyBase.Interval = value 
     If Not _paused Then 
      _originalInterval = MyBase.Interval 
     End If 
    End Set 
End Property 

Private Sub resetStopWatch(ByVal startNew As Boolean, ByVal resetPause As Boolean) 
    If _sw IsNot Nothing Then 
     _sw.Stop() 
     _sw = Nothing 
    End If 
    If resetPause Then 
     If _paused Then 
      Me.Interval = _originalInterval 
     End If 
     _paused = False 
     _intervalRemaining = Nothing 
    End If 
    If startNew Then 
     _sw = System.Diagnostics.Stopwatch.StartNew 
    End If 
End Sub 

Private Sub ImprovedTimer_Disposed(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Disposed 
    resetStopWatch(False, True) 
End Sub 

Private Sub ImprovedTimer_Elapsed(ByVal sender As Object, ByVal e As System.Timers.ElapsedEventArgs) Handles Me.Elapsed 
    resetStopWatch(Me.AutoReset, True) 
End Sub 

End Class 

Answer 2

没有停顿（），你可以写一个关于暂停（）：

1. 变化（Timeout.Infinite，Timeout.Infinite）
2. 保存计算计时器的剩余量。
   1. 变化（剩余计时器量）

   如果你写了这个类，请张贴在回答，因为它似乎我们很多人需要这些功能：

上个人简历（）

脱离Timer类。 :)

Answer 3

你应该按照Shay Erlichmen给出的建议。您需要在暂停时保存剩余的时间，并在计时器恢复时从该点继续。至于什么是错了你当前的代码：

Me.Interval = Me.Interval - sw.ElapsedMilliseconds 

上面的代码将确保你继续下一次它会工作打算的第一跳，但在continouos蜱你必须Me.Interval - sw.ElapsedMilliseconds作为间隔而不是原始设置间隔。

Answer 4

创建这样一个计时器：

System.Timers.Timer t = new System.Timers.Timer(1000) 
    t.Elapsed += new System.Timers.ElapsedEventHandler(timerEvent); 

    public void timerEvent(object source, System.Timers.ElapsedEventArgs e) 
    { 

    } 

可以将此属性设置为启动或暂停计时器执行timeEvent：

开始：

t.Enabled = true 

暂停：

t.Enabled = false 

Answer 5

这里是我一直使用的是什么。这可能不是最先进的准确，但工作很好。至少，对于试图在计时器中暂停/恢复的人来说，这是一个很好的起点。

public class PausableTimer 
{ 
    private Timer _timer; 
    private Stopwatch _stopWatch; 
    private bool _paused; 
    private double _interval; 
    private double _remainingTimeBeforePause; 

    public PausableTimer(double interval, ElapsedEventHandler handler) 
    { 
     _interval = interval; 
     _stopWatch = new Stopwatch(); 

     _timer = new Timer(interval); 
     _timer.Elapsed += (sender, arguments) => { 
      if (handler != null) 
      { 
       if(_timer.AutoReset) 
       { 
        _stopWatch.Restart(); 
       } 

       handler(sender, arguments); 
      } 
     }; 

     _timer.AutoReset = false; 
    } 

    public bool AutoReset 
    { 
     get 
     { 
      return _timer.AutoReset; 
     } 
     set 
     { 
      _timer.AutoReset = value; 
     } 
    } 

    public void Start() 
    { 
     _timer.Start(); 
     _stopWatch.Restart(); 
    } 

    public void Stop() 
    { 
     _timer.Stop(); 
     _stopWatch.Stop(); 
    } 

    public void Pause() 
    { 
     if(!_paused && _timer.Enabled) 
     { 
      _stopWatch.Stop(); 
      _timer.Stop(); 
      _remainingTimeBeforePause = Math.Max(0, _interval - _stopWatch.ElapsedMilliseconds); 
      _paused = true; 
     } 
    } 

    public void Resume() 
    { 
     if(_paused) 
     { 
      _paused = false; 
      if(_remainingTimeBeforePause > 0) 
      { 
       _timer.Interval = _remainingTimeBeforePause; 
       _timer.Start(); 
      } 
     } 
    } 
}