Section:

Convert File Types with Virtual Printer on Windows - Go Sample Code

Sample code to convert to PDF with virtual printer on Windows; provided in Python, C++, C#, Java, Node.js (JavaScript), Go and VB. It supports several input formats like docx, xlsx, rtf, txt, html, pub, emf, etc.

1//---------------------------------------------------------------------------------------
2// Copyright (c) 2001-2023 by Apryse Software Inc. All Rights Reserved.
3// Consult LICENSE.txt regarding license information.
4//---------------------------------------------------------------------------------------
5
6package main
7import (
8	"testing"
9	"fmt"
10	"flag"
11	"runtime"
12	. "github.com/ApryseSDK/pdftron-go/v2"
13)
14
15var licenseKey string
16var modulePath string
17
18func init() {
19    flag.StringVar(&licenseKey, "license", "", "License key for Apryse SDK")
20    flag.StringVar(&modulePath, "modulePath", "", "Module path for Apryse SDK")
21}
22
23//---------------------------------------------------------------------------------------
24// The following sample illustrates how to convert to PDF with virtual printer on Windows.
25// It supports several input formats like docx, xlsx, rtf, txt, html, pub, emf, etc. For more details, visit 
26// https://docs.apryse.com/windows/guides/features/conversion/convert-other/
27//
28// To check if ToPDF (or ToXPS) require that PDFNet printer is installed use Convert::RequiresPrinter(filename). 
29// The installing application must be run as administrator. The manifest for this sample 
30// specifies appropriate the UAC elevation.
31//
32// Note: the PDFNet printer is a virtual XPS printer supported on Vista SP1 and Windows 7.
33// For Windows XP SP2 or higher, or Vista SP0 you need to install the XPS Essentials Pack (or 
34// equivalent redistributables). You can download the XPS Essentials Pack from:
35//		http://www.microsoft.com/downloads/details.aspx?FamilyId=B8DCFFDD-E3A5-44CC-8021-7649FD37FFEE&displaylang=en
36// Windows XP Sp2 will also need the Microsoft Core XML Services (MSXML) 6.0:
37//		http://www.microsoft.com/downloads/details.aspx?familyid=993C0BCF-3BCF-4009-BE21-27E85E1857B1&displaylang=en
38//
39// Note: Convert.fromEmf and Convert.toEmf will only work on Windows and require GDI+.
40//
41// Please contact us if you have any questions.	
42//---------------------------------------------------------------------------------------
43
44// Relative path to the folder containing the test files.
45var inputPath = "../../TestFiles/"
46var outputPath = "../../TestFiles/Output/"
47
48
49func ConvertSpecificFormats() bool{
50	ret := false
51
52        
53	// Convert MSWord document to XPS
54	fmt.Println("Converting DOCX to XPS")
55	outputFile := "simple-word_2007.xps"
56	ConvertToXps(inputPath + "simple-word_2007.docx", outputPath + outputFile)
57	fmt.Println("Saved " + outputFile)
58
59    // Start with a PDFDoc to collect the converted documents
60    pdfdoc := NewPDFDoc()
61    // Convert the EMF document to PDF
62    s1 := inputPath + "simple-emf.emf"
63
64    fmt.Println("Converting from EMF")
65    ConvertFromEmf(pdfdoc, s1)
66    outputFile = "emf2pdf v2.pdf"
67    pdfdoc.Save(outputPath + outputFile, uint(SDFDocE_remove_unused))
68    fmt.Println("Saved " + outputFile)
69        
70    return ret
71}
72func ConvertToPdfFromFile() bool{
73	testFiles := [][]string{
74	{"simple-word_2007.docx","docx2pdf.pdf"}, 
75	{"simple-powerpoint_2007.pptx","pptx2pdf.pdf"}, 
76	{"simple-excel_2007.xlsx","xlsx2pdf.pdf"}, 
77    {"simple-publisher.pub","pub2pdf.pdf"},
78	{"simple-text.txt","txt2pdf.pdf"}, 
79    { "simple-rtf.rtf","rtf2pdf.pdf"},
80    { "simple-emf.emf","emf2pdf.pdf"},
81    { "simple-webpage.mht","mht2pdf.pdf"},
82    { "simple-webpage.html","html2pdf.pdf"}}
83    ret := false
84
85    if PrinterIsInstalled("PDFTron PDFNet"){
86		PrinterSetPrinterName("PDFTron PDFNet")
87    }else if ! PrinterIsInstalled(){
88		fmt.Println("Installing printer (requires Windows platform and administrator)")
89		PrinterInstall()
90		fmt.Println("Installed printer " + PrinterGetPrinterName())
91	}
92
93	for _, testfile := range testFiles {
94
95        pdfdoc := NewPDFDoc()
96        inputFile := testfile[0]
97        outputFile := testfile[1]
98        if ConvertRequiresPrinter(inputPath + inputFile){
99            fmt.Println("Using PDFNet printer to convert file " + inputFile)
100		}
101        ConvertToPdf(pdfdoc, inputPath + inputFile)
102        pdfdoc.Save(outputPath + outputFile, uint(SDFDocE_linearized))
103        pdfdoc.Close()
104        fmt.Println("Converted file: " + inputFile + "\nto: " + outputFile)
105	}
106    return ret
107}
108
109func TestConvertPrint(t *testing.T){
110	if runtime.GOOS == "windows" {
111		// The first step in every application using PDFNet is to initialize the 
112		// library. The library is usually initialized only once, but calling 
113		// Initialize() multiple times is also fine.
114		PDFNetInitialize(licenseKey)
115
116		// Demonstrate Convert.ToPdf and Convert.Printer
117		err := ConvertToPdfFromFile()
118		if err{
119			fmt.Println("ConvertFile failed")
120		}else{
121			fmt.Println("ConvertFile succeeded")
122		}
123		// Demonstrate Convert.[FromEmf, FromXps, ToEmf, ToSVG, ToXPS]
124		err = ConvertSpecificFormats()
125		if err{
126			fmt.Println("ConvertSpecificFormats failed")
127		}else{
128			fmt.Println("ConvertSpecificFormats succeeded")
129		}
130		fmt.Println("Uninstalling printer (requires Windows platform and administrator)")
131		PrinterUninstall()
132		fmt.Println("Uninstalled printer " + PrinterGetPrinterName())
133
134		PDFNetTerminate()
135		fmt.Println("Done.")
136	}else{
137		fmt.Println("ConvertPrintTest only available on Windows")
138	}
139}

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