将PDF转换为PostScript

Question

I need to convert a PDF file to PostScript using C#. Is it possible without using a third-party DLL? Or is there an open source project for the same?

Answer 1

The "cheapest" way to do this (I will not give my definition of 'cheap' in this context, though) would be to call one of the commandline utilities out there which can convert PDF to PostScript:

• gswin32c.exe (Win), gs (*nix): Ghostscript , multiplatform, GPL v3 license,...
• pdftops.exe (Win), pdftops (*nix): part of XPDF by Foolabs , multiplatform, GPL v2 license,...
• pdftops (*nix), from the "poppler" fork of XPDF (in theory a Windows version should be easy to compile, but there are no obvious places on the 'net to grab ready-made ones from)

Here are example commandlines, first for Ghostscript, assuming Windows (quotes for cases where names have spaces):

 "c:/path/to/gswin32c.exe" ^
     -sDEVICE=ps2write ^
     -o "c:/path/to/OUTPUT.pdf" ^
     "c:/path/to/INPUT.pdf"

and second for XPDF/pdftops (skipping paths, assuming files are in current directory):

 pdftops.exe ^
     -level3 ^
     INPUT.pdf ^
     OUTPUT.ps

Answer 2

您应该重新考虑您的要求：解释PDF是一项艰巨的工作，除非PDF格式非常特殊。

Answer 3

I don't think this can be done without a third party application or component.

You may be able to do a PDF to postscript conversion through a PostScript printer driver and then capture the output, but that would require you to be able to print PDF documents. You'll need either a PDF rendering component or a PDF reader application to do that.

Consider spending some cash on a decent conversion lib. I think you'll find it money well spent.

If you need an opensource tool, look into ghostscript. Most 'free' PDF converters use that.