当我关闭串口Comport时，我的c＃表单挂起了。有时它无能为力。 [英] When I close serial Comport, my c# form is hang. Sometimes it can do nothing.

问题描述

亲爱的先生，您好！

请帮助我。我正在编写一个程序来从串口捕获数据。我可以打开，我可以从该端口捕获数据。但我关闭串口，有时我的端口可以关闭，我的表格挂起，什么也不做。当我在那里遇到Break Point并发送F10时，它不会继续下一行。



public void StopPort（）

{

试试

{

myport.Close（）; //无法前往下一行。

this.Close（）;

}

catch（Exception ex）

{

this.Close （）;

}

}

谢谢

Thiha Swe

缅甸

解决方案

这似乎是一个已知的comport错误，如下所述：



Social msdn





他们建议在另一个帖子中关闭它，如下所示：

  private   void  Form1_FormClosing（ object  sender，FormClosingEventArgs e）
 
 {
 
  if （serialPort1.IsOpen）
 
 {
 
 e.Cancel =  true ;  //  取消fom结束 
 
线程CloseDown =  new 线程（ new  ThreadStart（CloseSerialOnExit））;  //  在新线程中关闭端口以避免挂起 
 
 CloseDown.Start（ ）;  //  在新主题中关闭端口以避免挂起 
 
} 
 
} 
 
  private   void  CloseSerialOnExit（）
 
 {
 
 尝试 
 
 {
 
 serialPort1.Close（ ）;  //  关闭串口 
 
} 
 
  catch （Exception ex）
 
 {
 
 MessageBox.Show（ex.Message）;  //  捕获任何串口关闭错误消息 
 
} 
 
  this  .Invoke（ new  EventHandler（NowClose））;  //  现在在主线程中关闭 
 
} 
 
  private   void  NowClose（ object  sender，EventArgs e）
 
 {
 
  this  .Close（）;  //  现在关闭表格 
 
} 

我遇到了同样的问题。在我的情况下，在关闭端口之前删除处理程序是解决方案：

 serialPort.ErrorReceived- = ErrorReceived; 
 serialPort.DataReceived  -  = SerialDataReceived; 
 serialPort.Close（）; 

Bruno

Hello Dear Sir,
Please help me. I am writing a program to catch data from serial port . I can open and I can catch data from that port . But I close the serial port , sometimes my port can be closed and my form is hang , can do nothing. When I catch with Break Point there, and send F10, but it does not go on next line.

public void StopPort()
{
try
{
myport.Close();// cannot go to next line hang around here.
this.Close();
}
catch (Exception ex)
{
this.Close();
}
}
Thanks
Thiha Swe
Myanmar

解决方案

It's seems that's a known bug of comport,as stated here:

Social msdn


They advise to close it in another thread,something like this:

private void Form1_FormClosing(object sender, FormClosingEventArgs e)

{

if (serialPort1.IsOpen)

{

e.Cancel = true; //cancel the fom closing

Thread CloseDown = new Thread(new ThreadStart(CloseSerialOnExit)); //close port in new thread to avoid hang

CloseDown.Start(); //close port in new thread to avoid hang

}

}

private void CloseSerialOnExit()

{

try

{

serialPort1.Close(); //close the serial port

}

catch (Exception ex)

{

MessageBox.Show(ex.Message); //catch any serial port closing error messages

}

this.Invoke(new EventHandler(NowClose)); //now close back in the main thread

}

private void NowClose(object sender, EventArgs e)

{

this.Close(); //now close the form

}

I faced the same Problems. In my case removing handlers before closing the port was the solution:

serialPort.ErrorReceived-= ErrorReceived;
serialPort.DataReceived -= SerialDataReceived;
serialPort.Close();

Bruno

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