I am trying to make a Print application on UWP, but the samples show
await Windows.Graphics.Printing.PrintManager.ShowPrintUIAsync();
This brings the UWP Print Dialog.
I need to print directly without this dialog. How to do this?
I need something like
await Windows.Graphics.Printing.PrintManager.PrintAsync();
We should be able to programatically list printers, select the printer, configure paper size, orientation, settings...
The current UWP API does not support silent printing, i.e. without explicit user interaction.
For POS scenarios UWP does offer the POSPrinter API - this may or may not apply to your scenario though:
https://docs.microsoft.com/en-us/uwp/api/Windows.Devices.PointOfService.PosPrinter
https://github.com/Microsoft/Windows-universal-samples/tree/master/Samples/PosPrinter
For LOB applications running on desktop, you also have the option to continue using your Win32 printing APIs from a fulltrust process included in your UWP app package. I have put together a quick sample that demonstrates this technique in the example of printing image files silently from a UWP:
Store: https://www.microsoft.com/store/apps/9pd51nnkx3t2
Source: https://1drv.ms/u/s!AovTwKUMywTNnOsbzlRfghOikDy8Dw
It's certainly a valid feature request and we should extend the API to enable this scenario with the right user model in place (API, capability, settings, etc.) to ensure a proper user experience.
Please vote here on UserVoice to help the team prioritize the feature: https://wpdev.uservoice.com/forums/110705-universal-windows-platform/suggestions/6185763-allow-direct-printing-without-modern-ui-print-dial
I am using RawPrint nuget to print silently in UWP:
https://github.com/frogmorecs/RawPrint
Sample:
...
if (file != null)
{
IPrinter printer = new Printer();
var stream = await file.OpenStreamForReadAsync();
printer.PrintRawStream("Brother DCP-L2540DN series Printer", stream, file.DisplayName);
}
