Writing to the parallel port

[jfradley]

Does anybody have an example of writing to the parallel port with any dot net langauge for Win XP Pro?

Thanks,
Joe

 

[palbano]

As far as i know there is no .NET library class that wraps Serial Port communications. Leaving you with a choice of using Platform Invocation Services or finding someone elses control that does it for you.

Basically you use the CreateFile() Win32 API and then use the IntPtr return value to open a .NET System.IO.FileStream.

Here is a link to a MSDN article that discusses doing just that:

http://msdn.microsoft.com/msdnmag/issues/02/10/NETSerialComm/default.aspx

I think you might find third party controls that handle this for you. There might even be one or two free ones found on GotDotNet.com

-pete

 

[jfradley]

Thanks for the info. But that class doesn't apply yo the parallel port. I had to download third party driver, 'DLPORTIO.DLL'.

 

[palbano]

>> But that class doesn't apply yo the parallel port

I don't know what class you mean. Given the example if you use the CreateFile() API with the value "LPT1" it opens a handle to the Parallel Port using the default driver configured for the port.


-pete

 

[gashcud]

check out this:

http://www.codeproject.com/csharp/csppleds.asp#xx614717xx

hope it helps
Gash