I'm using the code posted in this answer - https://stackoverflow.com/a/45138072/5359882
The code works perfectly for the printers with 3 duplex settings (off, short edge, long edge), when trying to set duplex for the printer with 4 settings (off, open to top, open to left, booklet), setting the duplex back to simplex (off) with this line is impossible:
- ds.SetPrinterDuplex(printername, 1, out errorMessage);
Setting duplex values also behaves funny... Is this resolvable? Many thanks in advance.
UPDATE
For testing purposes, I've created a simple WinForm with three buttons, button1 sets the duplex to 2 ("Open to Left" on the mentioned printer) ds.SetPrinterDuplex("Gestetner DSm415 PCL 6", 2, out errorMessage);
button2 is supposed to turn the duplex off ds.SetPrinterDuplex("Gestetner DSm415 PCL 6", 1, out errorMessage);
button3 outputs the current duplex value to a label.
By funny behaviour, I mean:
1. Setting duplex to 2 (Open to Left) or to 3 (Open to Top) via WinForm only works, when the initial duplex setting is "Off" (which has to be switched manually beforehand). Changing the value programmatically from any other setting other than Off is not possible.
2. When input any value as duplex setting and then output with the use of the 3rd button, this value will be displayed as the current duplex value (for example, if to set 10 by ds.SetPrinterDuplex("Gestetner DSm415 PCL 6", 10, out errorMessage); (which is absurd) and the call method GetPrinterDuplex, it shows duplex value as 10.
3. "errorMessage" parameter is an empty string when duplex is set to 1.
The code referenced in the first line of this thread stopped working for us when we went from a Konica Minolta 754 to a KM 958. This was fixed by switching the driver from a PCL6 driver to a post script driver for that newer model. We can now control 1-sided / 2-sided w the c# code referenced above w no paper tray error as well.