背景:我有一个计时器,我用它来跟踪自从serialPort DataReceived事件被触发以来它已经持续了多长时间。我正在创建自己的解决方案,而不是使用内置的超时事件,因为我正在获取连续的数据流,而不是发送查询并获得一个响应。System.Timers.Timer在timer.Stop()被调用后执行已经执行的事件
问题: 在DataReceived处理程序中,我有一条语句来停止计时器,以便不会过去。问题是很多时候它仍然执行Elapsed处理程序。
我读过,这是可以使用SynchronizingObject来解决这个问题,但我不知道如何做到这一点。
这是我的代码:我试图剪掉所有我认为不相关的东西。
private System.Timers.Timer timeOut;
private System.Timers.Timer updateTimer;
public void start()
{
thread1 = new Thread(() => record());
thread1.Start();
}
public void requestStop()
{
this.stop = true;
this.WaitEventTest.Set();
}
private void record()
{
timeOut = new System.Timers.Timer(500); //** .5 Sec
updateTimer = new System.Timers.Timer(500); //** .5 Sec
timeOut.Elapsed += TimeOut_Elapsed;
updateTimer.Elapsed += updateTimer_Elapsed;
updateTimer.AutoReset = true;
comport.Open();
comport.DiscardInBuffer();
comport.Write(COMMAND_CONTINUOUSMODE + "\r");
stopwatch.Reset();
stopwatch.Start();
recordingStartTrigger(); //** Fire Recording Started Event
timeOut.Start();
updateTimer.Start();
this.waitHandleTest.WaitOne(); //** wait for test to end
timeOut.Stop();
updateTimer.Stop();
comport.Write(COMMAND_COMMANDMODE + Environment.NewLine);
comport.DiscardInBuffer();
comport.Close();
recordingStopTrigger(status); //** Fire Recording Stopped Event
stopwatch.Stop();
}
//***********************************************************************************
//** Events Handlers
private void comDataReceived_Handler(object sender, SerialDataReceivedEventArgs e)
{
double force = -100000;
string temp = "-100000";
//timeOut.SynchronizingObject.Invoke(new Action(()=> {timeOut.Stop();}), new object[] {sender, e});
timeOut.Stop();
//** I removed my action code here, keep things simple.
timeOut.Start();
}
private void TimeOut_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
timeOut.Stop();
updateTimer.Stop();
//** fire delegate that GUI will be listening to, to update graph.
if (eventComTimeOut != null && this.stop == false)
{
if (eventComTimeOut(this, new eventArgsComTimeOut(comport.PortName, "READ")))
{
//retry = true;
comport.Write(COMMAND_CONTINUOUSMODE + "\r");
updateTimer.Start();
timeOut.Start();
}
else
{
this.stop = true;
//retry = false;
this.WaitEventTest.Set();
status = eventArgsStopped.Status.failed;
}
}
}
void updateTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
//** fire delegate that GUI will be listening to, to update graph.
List<Reading> temp = new List<Reading>(report.Readings_Force);
eventNewData(this, new eventArgsNewData(temp));
}
@Downvoter有何评论? –
最后加入try的原因是什么? –
@mikejames在'try'块中,你会添加你的逻辑,即使在例外的情况下,finally块也会确保你的定时器将再次启动。 –