[IronPython] Serial Port Commn: unhandled ObjectDisposedException though exception handler provided

[Michael Foord]

Well... I know nothing about these APIs and am guessing, but the 
traceback is in an AsyncCallback happening on another thread - so an 
exception handler in this thread isn't going to catch it.

Why do you close the port before opening it?

ReadTo doesn't look like an Async API [1]. You snipped the top line of 
the traceback which includes any mention of the line number where it was 
raised. Have you put a print in to confirm that your exception handling 
block is never entered?

Michael

http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.readto.aspx

Sheetal.Pawar at lntinfotech.com wrote:
>
>
> Hi,
>
> I am writing a serial port communication application using Iron 
> Python. Following is a sample code:
>
>          try:
>
>             BaudRate = 9600
>             DataBits = 8           
>           
> #create a serial port instance for the desired port as specified
>             serialPort = System.IO.Ports.SerialPort( "COM1")
>           
>             serialPort.BaudRate = BaudRate 
>
>             serialPort.DataBits = DataBits
>
> #open the port
>             serialPort.Close()
>             serialPort.Open()
>
>             serialPort.ReadTimeout = 30000
>
>             returnValue = serialPort.ReadTo( "xx" )
>         except:
>             print "error"
>             returnValue = ""
>
>         serialPort.Close()
>         serialPort.Dispose()
>
>  
>
> Here if i abort my application using Cntrl + C on the iron python 
> console, then i get ObjectDisposedException unhandled though i have 
> provided an exception handler.
>
> I tried to abort the application while it was waiting for some data to 
> be read and the timeout had not occured. The application exits and I 
> get the exception after it exits.
>
> Stack Trace:
>
>    at Microsoft.Win32.Win32Native.SetEvent(SafeWaitHandle handle)
>    at System.Threading.EventWaitHandle.Set()
>    at System.IO.Ports.SerialStream.AsyncFSCallback(UInt32 errorCode, 
> UInt32 numBytes, NativeOverlapped* pOverlapped)
>    at 
> System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 
> errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)
>
> Please let me know what can be the issue.
>
> Thanks & regards,
> Sheetal
>
>
>
>
>
>
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