RS232 problem (reading)

[Morten Snedker]

Each employee has a card with a barcode. This is used to check in and
out from work. It is 15-16 characters in length using letters and
numbers 0-9 and A-Z (plus a single dash (-)).

Using hyperterminal the card is read fine every time. Using my vb.net
program it fails on certain characters.

E.g. the number 4 is returned as ´ (or ` - don't remember). The
problem is persistant.

Any idea as to what the problem might be?

Thanx for any input.
Regards /Snedker

[Ken Tucker [MVP]]

Hi,

http://www.codeproject.com/vb/net/demmvbscan.asp

Ken
----------------------
"Morten Snedker" <morten_spammenot_ATdbconsult.dk> wrote in message
news:1m********************************@4ax.com...
Each employee has a card with a barcode. This is used to check in and
out from work. It is 15-16 characters in length using letters and
numbers 0-9 and A-Z (plus a single dash (-)).

Using hyperterminal the card is read fine every time. Using my vb.net
program it fails on certain characters.

E.g. the number 4 is returned as ´ (or ` - don't remember). The
problem is persistant.

Any idea as to what the problem might be?

Thanx for any input.
Regards /Snedker

[Supra]

http://www.codeworks.it/net/VBNetRs232.htm

Morten Snedker wrote:

Each employee has a card with a barcode. This is used to check in and
out from work. It is 15-16 characters in length using letters and
numbers 0-9 and A-Z (plus a single dash (-)).

Using hyperterminal the card is read fine every time. Using my vb.net
program it fails on certain characters.

E.g. the number 4 is returned as ´ (or ` - don't remember). The
problem is persistant.

Any idea as to what the problem might be?

Thanx for any input.
Regards /Snedker

[Dick Grier]

Hi,

What is your code? Without seeing that, it is hard to say what is the
problem. You don't say what Edition of .NET you are using. Is this VS2003
or VS2005?

You can download DesktopSerialIO from my homepage, and I have several
barcode reader examples in my book (see below). Barcode data, normally, is
straight ASCII, so reading it should be straight forward.

Displaying the read data, on the other hand, may require that you call
Invoke or BeginInvoke to marshal data from the read thread to the UI
(STAThread) -- depending on how you implement your code.

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. See
www.mabry.com/vbpgser4 to order.

[Morten Snedker]

On Fri, 26 Aug 2005 08:55:32 -0600, "Dick Grier"
<di**************@msn.com> wrote:

Rather than trying to track down my problem I solved it by the use of
your DesktopSerialIO. So thanks alot for your time and input!

/Snedker

Hi,

What is your code? Without seeing that, it is hard to say what is the
problem. You don't say what Edition of .NET you are using. Is this VS2003
or VS2005?

You can download DesktopSerialIO from my homepage, and I have several
barcode reader examples in my book (see below). Barcode data, normally, is
straight ASCII, so reading it should be straight forward.

Displaying the read data, on the other hand, may require that you call
Invoke or BeginInvoke to marshal data from the read thread to the UI
(STAThread) -- depending on how you implement your code.

Dick

[Supra]

using vs 2003 but getting vs 2005 sooner but not beta =-O

Dick Grier wrote:

Hi,

What is your code? Without seeing that, it is hard to say what is the
problem. You don't say what Edition of .NET you are using. Is this VS2003
or VS2005?

You can download DesktopSerialIO from my homepage, and I have several
barcode reader examples in my book (see below). Barcode data, normally, is
straight ASCII, so reading it should be straight forward.

Displaying the read data, on the other hand, may require that you call
Invoke or BeginInvoke to marshal data from the read thread to the UI
(STAThread) -- depending on how you implement your code.

Dick