C++ API를 통해 PDF 파일 생성, 편집 및 변환

NuGet을 통해 C++용 Aspose.PDF 설치

NuGet\Install-Package Aspose.PDF -prerelease 

Aspose PDF 제품 페이지에서 직접 다운로드할 수도 있습니다.

C++ API를 통해 PDF 파일 생성

 void CreatePDF() {
    // String for path name.
    String _dataDir("C:\\Samples\\");

    // String for file name.
    String filename("sample-new.pdf");

    // Initialize document object
    auto document = MakeObject();
    // Add page
    auto page = document->get_Pages()->Add();

    // Add text to new page
    auto textFragment = MakeObject(u"Hello World!");
    page->get_Paragraphs()->Add(textFragment);

    // Save updated PDF
    String outputFileName = _dataDir + filename;

    document->Save(outputFileName);
}

C++ API를 통해 PDF 파일의 권한을 설정하는 방법

 void SecuringAndSigning::SetPrivilegesOnExistingPDF() {
    // String for path name.
    String _dataDir("C:\\Samples\\");

    // Load a source PDF file
    auto document = MakeObject(_dataDir + u"input.pdf");

    // Instantiate Document Privileges object

    // Apply restrictions on all privileges
    auto documentPrivilege = DocumentPrivilege::get_ForbidAll();
    // Only allow screen reading
    documentPrivilege->set_AllowScreenReaders(true);

    // Encrypt the file with User and Owner password.
    // Need to set the password, so that once the user views the file with user password,

    // Only screen reading option is enabled
    document->Encrypt(u"user", u"owner", documentPrivilege, CryptoAlgorithm::AESx128, false);

    // Save updated document
    document->Save(_dataDir + u"SetPrivileges_out.pdf");
}

C++에서 PDF를 XLS로 변환

void ConvertPDFtoExcel()
{
    std::clog << __func__ << ": Start" << std::endl;
    // String for path name
    String _dataDir("C:\\Samples\\Conversion\\");

    // String for file name
    String infilename("sample.pdf");
    String outfilename("PDFToExcel.xls");

    // Open document
    auto document = MakeObject(_dataDir + infilename);

    try {
    // Save the output in XLS format
    document->Save(_dataDir + outfilename, SaveFormat::Excel);
    }
    catch (Exception ex) {
    std::cerr << ex->get_Message();
    }
    std::clog << __func__ << ": Finish" << std::endl;
}

C++를 통해 PDF의 이미지를 압축하는 방법

void CompressImage() {
    // String for path name
    String _dataDir("C:\\Samples\\");

    // String for input file name
    String infilename("ShrinkDocument.pdf");
    String outfilename("ShrinkDocument_out.pdf");

    // Open document
    auto document = MakeObject(_dataDir + infilename);

    // Initialize OptimizationOptions
    auto optimizationOptions = MakeObject();

    // Set CompressImages option
    optimizationOptions->get_ImageCompressionOptions()->set_CompressImages(true);
    // Set ImageQuality option
    optimizationOptions->get_ImageCompressionOptions()->set_ImageQuality(50);

    // Optimize PDF document using OptimizationOptions
    document->OptimizeResources(optimizationOptions); 
    // Save updated document
    document->Save(_dataDir + outfilename);
}