SerialPort and Thread Safe

[tzzdvd]

Hi to all,
I am using c# since last week so I'am not so expert.
I have this problem: I have created a delegate function to handle the result of the data received and managed it with the method .InvokeRequire and .Invoke().
I show the code

delegate void SetCallBackRxMsg();

private void ReceivedSerialData(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
if (btnReception.Text == "Stop Reception")
{
    try
    {
        iRxIndex += controlSerialPort.Read(byRxMessage, iRxIndex, controlSerialPort.BytesToRead);
    }
    catch
    {
    }
    finally
    {
        if (iRxIndex > 1 && iRxIndex >= iLenMsg)
        {
            this.RxMessage();
        }
    }
}

private void RxMessage()
if (this.InvokeRequired)
{
    this.Invoke(new SetCallBackRxMsg(RxMessage), new object[] { });
}
else
{
    // message received
    // ...
}

Everything works very well till I close the form exactly while receiving datas.
The program blocks at line

this.Invoke(new SetCallBackRxMsg(RxMessage), new object[] { });

and wait for I don't know what.
I try to add this code on the Closing event of the form

private void myForm_FormClosing(object sender, FormClosingEventArgs e)
{
   if (controlSerialPort.IsOpen)
   {
      controlSerialPort.DiscardInBuffer();
      controlSerialPort.Close();
   }
}

but it is not helpfull.
Any ideas?
Thank's for all.

 

[chiph]

Try changing your call to Invoke to BeginInvoke. This will get the callback off the receiving thread and onto a thread from the default threadpool. This way you shouldn't block when closing the form (maybe).

Chip H.


____________________________________________________________________
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[tzzdvd]

It seems to function!!!
Thank you very much.

Davide