C# Timer 拒绝停止计时

Question

我整天在这个问题上摸不着头脑，这让我很生气，这有什么我不知道的明显问题吗？

代码如下：

private Timer _timer = null;
private EventHandler ev = null;
private void startAnimatingPicStatus()
{
     Console.WriteLine("    | STARTING ANIMATION");
     _timer = new Timer();
     _timer.Interval = 100;
     ev = new EventHandler(timer_Tick);
     _timer.Tick += ev;
     _timer.Start();
 }
 private int animationPosition = 0;
 private void timer_Tick(object sender, EventArgs e)
 {
     Console.WriteLine("    | ANIMATING ANIMATION");
     animationPosition++;
     if (animationPosition == 4) animationPosition = 1;
     Dictionary<int, Image> images = new Dictionary<int, Image>();
     images[1] = myproject.Properties.Resources.animateimage_1;
     images[2] = myproject.Properties.Resources.animateimage_2;
     images[3] = myproject.Properties.Resources.animateimage_3;

     picStatus.Image = images[animationPosition];
 }

 private void stopAnimatingPicStatusIfAnimatingAndSetToComplete()
 {
     Console.WriteLine("    | STOPPING ANIMATION");
     _timer.Tick -= ev;
     _timer.Dispose();
     picStatus.Image = nofolder.Properties.Resources.tfolderg;            
  }

这是我期望的调试：

| STARTING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| STOPPING ANIMATION

但这就是我得到的：

| STARTING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| STOPPING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION
| ANIMATING ANIMATION

好消息是它似乎确实停止了动画。坏消息是它只是有时而且它是随机的，但似乎有 50% 的时间发生 - 50% 的时间动画停止，大约 50% 的时间它只是旋转动画，即使它应该停止了

编辑>解决方案我在startAnimatingPicStatus() 中添加了if (ev != null) _timer.Tick -= ev;，就在ev = new EventHandler(timer_Tick); 行之前，这似乎已经修复了它

Answer 1

要停止计时器，您是否尝试过使用 Change 方法，就像：

myTimer.Change(Timeout.Infinite, Timeout.Infinite);

更多信息在这里：https://msdn.microsoft.com/en-us/library/yz1c7148%28v=vs.110%29.aspx