Hi,
I'm experimenting with the Serial Port in VB.NET 2005. Although it isn't
that easy to get any feedback from my COM-port as I thought it would be...
How can I read all the Data that the port sends back?
I tryed with SerialPort1.ReadLine, but that blocks the application and takes
a lot of time (10 seconds!), I tryed SerialPort1.Read, but I have to read it
into a buffer and has to indicate the count, but how do I know this?
Does anybody knows a nice way to send and receive smoothly all the data from
the SerialPort?
Thanks a lot in advance,
Pieter 4 3212
DraguVaso,
I have not tried the new SerialPort yet, are you using it from your
MainWindow (thread) or in a separate thread?
Looking at http://msdn2.microsoft.com/library/30swa673.aspx
Have you tried handling the ReceivedEvent?
I would probably use a separate thread...
Again I have not really tried got a chance to play with it.
If you haven't you may want to ask in the VS.NET 2005 newsgroups found at: http://communities.microsoft.com/new...y&slcid=us
The bottom of the intro has instructions on how to use the newsgroups via
Outlook Express instead of the web interface.
Hope this helps
Jay
"DraguVaso" <pi**********@hotmail.com> wrote in message
news:O6**************@TK2MSFTNGP09.phx.gbl... Hi,
I'm experimenting with the Serial Port in VB.NET 2005. Although it isn't that easy to get any feedback from my COM-port as I thought it would be...
How can I read all the Data that the port sends back?
I tryed with SerialPort1.ReadLine, but that blocks the application and takes a lot of time (10 seconds!), I tryed SerialPort1.Read, but I have to read it into a buffer and has to indicate the count, but how do I know this?
Does anybody knows a nice way to send and receive smoothly all the data from the SerialPort?
Thanks a lot in advance,
Pieter
Hi,
You can read all AVAILABLE data. You should read data as it is acquired and
buffered.
What I do is to use the OnComm receive event. I double-buffer data there
(append to a variable) until all of the data that I need has been received.
I do this by parsing (in you case, append to a string buffer, and use the
IndexOf method of the string to locate the appropriate terminating
condition), or by checking the length of the data that have been buffered.
BTW, I have examples of these sorts of things in my book (see below),
including VS 2005.
Dick
--
Richard Grier (Microsoft Visual Basic MVP)
See www.hardandsoftware.net for contact information.
Author of Visual Basic Programmer's Guide to Serial Communications, 4th
Edition ISBN 1-890422-28-2 (391 pages) published July 2004.
Thanks for the info!
did you also use an SMS-Modem? Especially the Audiotel Industrial GPRS plus
Modem?
"Dick Grier" <di**************@msn.com> wrote in message
news:e%****************@TK2MSFTNGP14.phx.gbl... Hi,
You can read all AVAILABLE data. You should read data as it is acquired
and buffered.
What I do is to use the OnComm receive event. I double-buffer data there (append to a variable) until all of the data that I need has been
received. I do this by parsing (in you case, append to a string buffer, and use the IndexOf method of the string to locate the appropriate terminating condition), or by checking the length of the data that have been buffered.
BTW, I have examples of these sorts of things in my book (see below), including VS 2005.
Dick
-- Richard Grier (Microsoft Visual Basic MVP)
See www.hardandsoftware.net for contact information.
Author of Visual Basic Programmer's Guide to Serial Communications, 4th Edition ISBN 1-890422-28-2 (391 pages) published July 2004.
Hi,
I have not used an SMS modem. It shouldn't matter, though. Modems are
modems... There are individual small variations (and "funnies"), but in
general they work similarly.
Dick
--
Richard Grier (Microsoft Visual Basic MVP)
See www.hardandsoftware.net for contact information.
Author of Visual Basic Programmer's Guide to Serial Communications, 4th
Edition ISBN 1-890422-28-2 (391 pages) published July 2004. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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