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Convert Office documents (Excel word PowerPoint) to PDF using C++

Sample C++ code for using PDFTron SDK to convert Office documents to PDF (including Word, Excel, PowerPoint and Publisher) without needing any external dependencies or MS Office licenses. Office to PDF conversion can be performed on a Linux or Windows server to automate Office-centric workflows, or entirely in the user's client (web browser, mobile device). The conversion functionality can be combined with our Viewer to display or annotate Office files (docx, xlsx, pptx) on all major platforms, including Web, Android, iOS, Xamarin, UWP, and Windows. Learn more about our C++ PDF Library and Office Document Conversion Library.

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//------------------------------------------------------------------------------
// Copyright (c) 2001-2019 by PDFTron Systems Inc. All Rights Reserved.
// Consult legal.txt regarding legal and license information.
//------------------------------------------------------------------------------

#include <iostream>
#include <sstream>
#include <PDF/PDFNet.h>
#include <PDF/Convert.h>
#include <PDF/OfficeToPDFOptions.h>

//------------------------------------------------------------------------------
// The following sample illustrates how to use the PDF::Convert utility class 
// to convert MS Office files to PDF
//
// This conversion is performed entirely within the PDFNet and has *no* 
// external or system dependencies dependencies -- Conversion results will be
// the same whether on Windows, Linux or Android.
//
// Please contact us if you have any questions.	
//------------------------------------------------------------------------------

using namespace pdftron;
using namespace PDF;

UString input_path = "../../TestFiles/";
UString output_path = "../../TestFiles/Output/";

void SimpleDocxConvert(UString input_filename, UString output_filename)
{
	// Start with a PDFDoc (the conversion destination)
	PDFDoc pdfdoc;

	// perform the conversion with no optional parameters
	Convert::OfficeToPDF(pdfdoc, input_path + input_filename, NULL);

	// save the result
	pdfdoc.Save(output_path + output_filename, SDF::SDFDoc::e_linearized, NULL);
	
	// And we're done!
	std::cout << "Saved " << output_filename << std::endl;
}

void FlexibleDocxConvert(UString input_filename, UString output_filename)
{
	// Start with a PDFDoc (the conversion destination)
	PDFDoc pdfdoc;

	OfficeToPDFOptions options;

	// set up smart font substitutions to improve conversion results
	// in situations where the original fonts are not available
	options.SetSmartSubstitutionPluginPath(input_path);

	// create a conversion object -- this sets things up but does not yet
	// perform any conversion logic.
	// in a multithreaded environment, this object can be used to monitor
	// the conversion progress and potentially cancel it as well
	DocumentConversion conversion = Convert::StreamingPDFConversion(
		pdfdoc, input_path + input_filename, &options);
	
	// Print the progress of the conversion.
	/*
	std::cout << "Status: " << conversion.GetProgress()*100 << "%, "
			<< conversion.GetProgressLabel() << std::endl;
	*/

	// actually perform the conversion
	// this particular method will not throw on conversion failure, but will
	// return an error status instead
		
	while (conversion.GetConversionStatus() == DocumentConversion::eIncomplete)
	{
		conversion.ConvertNextPage();
		// print out the progress status as we go
		/*
		std::cout << "Status: " << conversion.GetProgress()*100 << "%, "
			<< conversion.GetProgressLabel() << std::endl;
		*/
	}

	if(conversion.GetConversionStatus() == DocumentConversion::eSuccess)
	{
		int num_warnings = conversion.GetNumWarnings();
		
		// print information about the conversion 
		for (int i = 0; i < num_warnings; ++i)
		{
			std::cout << "Conversion Warning: " 
				<< conversion.GetWarningString(i) << std::endl;
		}

		// save the result
		pdfdoc.Save(output_path + output_filename, SDF::SDFDoc::e_linearized, NULL);
		// done
		std::cout << "Saved " << output_filename << std::endl;
	}
	else
	{
		std::cout << "Encountered an error during conversion: " 
			<< conversion.GetErrorString() << std::endl;
	}

	
}


int main(int argc, char *argv[])
{	
	// The first step in every application using PDFNet is to initialize the 
	// library. The library is usually initialized only once, but calling 
	// Initialize() multiple times is also fine.
	int ret = 0;

	PDFNet::Initialize();
	PDFNet::SetResourcesPath("../../../Resources");

	try
	{
		// first the one-line conversion function
		SimpleDocxConvert("simple-word_2007.docx", "simple-word_2007.pdf");

		// then the more flexible line-by-line conversion API
		FlexibleDocxConvert("the_rime_of_the_ancient_mariner.docx",
			"the_rime_of_the_ancient_mariner.pdf");

	}
	catch (Common::Exception& e)
	{
		std::cout << e << std::endl;
		ret = 1;
	}
	catch (...)
	{
		std::cout << "Unknown Exception" << std::endl;
		ret = 1;
	}

	PDFNet::Terminate();
	std::cout << "Done.\n";
	return ret;
}
close

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