Q:
Can text be added to a PDF loaded in memory and then printed without
viewing or saving the PDF?
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A:
Using PDFNet SDK you can read PDF stored in memory buffer (please take
a look at PDFDocMemory sample project - http://www.pdftron.com/net/samplecode.html#PDFDocMemory).
It is also possible to add text and other content to this document
(http://www.pdftron.com/net/faq.html#how_watermark). You can also
silently print the document (please see PDFPrint sample project -
http://www.pdftron.com/net/samplecode.html#PDFPrint) without viewing
or saving the PDF.