Mengonversi PDF ke format PDF/A

Aspose.PDF for .NET memungkinkan Anda untuk mengonversi file PDF ke file PDF yang sesuai dengan PDF/A. Sebelum melakukannya, file harus divalidasi. Topik ini menjelaskan bagaimana.

Harap dicatat bahwa kami mengikuti Adobe Preflight dan veraPDF untuk memvalidasi kepatuhan PDF/A. Semua alat di pasar memiliki “representasi” mereka sendiri tentang kepatuhan PDF/A. Harap periksa artikel ini tentang alat validasi PDF/A untuk referensi. Kami memilih produk Adobe untuk memverifikasi bagaimana Aspose.PDF menghasilkan file PDF karena Adobe berada di pusat segala sesuatu yang terkait dengan PDF.

Konversi file menggunakan metode Convert dari kelas Document. Sebelum mengonversi PDF ke file yang sesuai dengan PDF/A, validasi PDF menggunakan metode Validate. Hasil validasi disimpan dalam file XML dan kemudian hasil ini juga diteruskan ke metode Convert. Anda juga dapat menentukan tindakan untuk elemen yang tidak dapat dikonversi menggunakan enumerasi ConvertErrorAction.

Coba konversi PDF ke PDF/A secara online

Aspose.PDF for .NET menyajikan aplikasi gratis online “PDF to PDF/A-1A”, di mana Anda dapat mencoba menyelidiki fungsionalitas dan kualitasnya.

Potongan kode berikut juga bekerja dengan pustaka Aspose.PDF.Drawing.

Standar yang Didukung

Kami mendukung standar berikut: PDF/A-1b, PDF/A-1a, PDF/A-2b, PDF/A-2u, PDF/A-2a, PDF/A-3b, PDF/A-3u, PDF/A-3a, PDF/A-4, PDF/A-4e, PDF/A-4f.

Mengonversi file PDF ke PDF/A-1b

Mengonversi PDF ke PDF/A-1b

Potongan kode berikut menunjukkan cara mengonversi file PDF ke PDF yang sesuai dengan PDF/A-1b.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ConvertPdfToPdfA()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_DocumentConversion();
    
    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "PDFToPDFA.pdf"))
    {
        // Convert to PDF/A compliant document
        // During conversion process, the validation is also performed
        document.Convert(dataDir + "PDFA1bConversionLog.xml", Aspose.Pdf.PdfFormat.PDF_A_1B, Aspose.Pdf.ConvertErrorAction.Delete);
        
        // Save PDF document
        document.Save(dataDir + "PDFToPDFA_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ConvertPdfToPdfA()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_DocumentConversion();
    
    // Open PDF document
    using var document = new Aspose.Pdf.Document(dataDir + "PDFToPDFA.pdf");

    // Convert to PDF/A compliant document
    // During conversion process, the validation is also performed
    document.Convert(dataDir + "PDFA1bConversionLog.xml", Aspose.Pdf.PdfFormat.PDF_A_1B, Aspose.Pdf.ConvertErrorAction.Delete);
    
    // Save PDF document
    document.Save(dataDir + "PDFToPDFA_out.pdf");
}

Untuk melakukan validasi saja, gunakan baris kode berikut:

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ValidatePdfAStandard()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();
    
    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "ValidatePDFAStandard.pdf"))
    {
        // Validate PDF for PDF/A-1a
        document.Validate(dataDir + "ValidationResultA1b.xml", Aspose.Pdf.PdfFormat.PDF_A_1B);
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ValidatePdfAStandard()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();

    // Open PDF document
    using var document = new Aspose.Pdf.Document(dataDir + "ValidatePDFAStandard.pdf");

    // Validate PDF for PDF/A-1a
    document.Validate(dataDir + "ValidationResultA1b.xml", Aspose.Pdf.PdfFormat.PDF_A_1B);
}

Mengonversi file PDF ke PDF/A-3b

Mengonversi PDF ke PDF/A-3b

Aspose.PDF for .NET juga mendukung fitur untuk mengonversi file PDF ke format PDF/A-3b.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ConvertPdfToPdfA3b()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_DocumentConversion();
    
    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "PDFToPDFA.pdf"))
    {
        // Convert to PDF/A compliant document, log file is omitted
        document.Convert(Stream.Null, Aspose.Pdf.PdfFormat.PDF_A_3B, Aspose.Pdf.ConvertErrorAction.Delete);
        
        // Save PDF document
        document.Save(dataDir + "PDFToPDFA3b_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ConvertPdfToPdfA3b()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_DocumentConversion();

    // Open PDF document
    using var document = new Aspose.Pdf.Document(dataDir + "PDFToPDFA.pdf");

    // Convert to PDF/A compliant document, log file is omitted
    document.Convert(Stream.Null, Aspose.Pdf.PdfFormat.PDF_A_3B, Aspose.Pdf.ConvertErrorAction.Delete);

    // Save PDF document
    document.Save(dataDir + "PDFToPDFA3b_out.pdf");
}

Mengonversi file PDF ke PDF/A-4

Mengonversi PDF ke PDF/A-4

Aspose.PDF for .NET juga mendukung fitur untuk mengonversi file PDF ke format PDF/A-4.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ConvertPdfToPdfA4()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_DocumentConversion();
    
    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "PDFToPDFA.pdf"))
    {
        // If the document version is less than PDF-2.0, it must be converted to PDF-2.0
        document.Convert(Stream.Null, Aspose.Pdf.PdfFormat.v_2_0, Aspose.Pdf.ConvertErrorAction.Delete);
    
        // Convert to the PDF/A-4 format
        document.Convert(dataDir + "PDFA4ConversionLog.xml", Aspose.Pdf.PdfFormat.PDF_A_4, Aspose.Pdf.ConvertErrorAction.Delete);

        // Save PDF document
        document.Save(dataDir + "PDFToPDFA4_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ConvertPdfToPdfA4()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_DocumentConversion();

    // Open PDF document
    using var document = new Aspose.Pdf.Document(dataDir + "PDFToPDFA.pdf");

    // If the document version is less than PDF-2.0, it must be converted to PDF-2.0
    document.Convert(Stream.Null, Aspose.Pdf.PdfFormat.v_2_0, Aspose.Pdf.ConvertErrorAction.Delete);

    // Convert to the PDF/A-4 format
    document.Convert(dataDir + "PDFA4ConversionLog.xml", Aspose.Pdf.PdfFormat.PDF_A_4, Aspose.Pdf.ConvertErrorAction.Delete);

    // Save PDF document
    document.Save(dataDir + "PDFToPDFA4_out.pdf");
}

Menambahkan Lampiran ke file PDF/A

Jika Anda memiliki kebutuhan untuk melampirkan file ke dokumen yang sesuai dengan PDF/A, maka kami merekomendasikan menggunakan nilai PDF_A_3A dari enumerasi Aspose.PDF.PdfFormat. PDF/A-3a adalah format yang menyediakan fitur untuk melampirkan format file apa pun sebagai lampiran ke file yang sesuai dengan PDF/A.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddAttachmentToPdfA()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_DocumentConversion();
    
    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "PDFToPDFA.pdf"))
    {
        // Setup new file to be added as attachment
        using (var fileSpecification = new Aspose.Pdf.FileSpecification(dataDir + "aspose-logo.jpg", "Large Image file"))
        {
            // Add attachment to document's attachment collection
            document.EmbeddedFiles.Add(fileSpecification);

            // Perform conversion to PDF/A-3a, so that the attachment is included in the resultant file
            document.Convert(dataDir + "PDFA3aConversionLog.xml", Aspose.Pdf.PdfFormat.PDF_A_3A, Aspose.Pdf.ConvertErrorAction.Delete);

            // Save PDF document
            document.Save(dataDir + "AddAttachmentToPDFA_out.pdf");
        }
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void AddAttachmentToPdfA()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_DocumentConversion();

    // Open PDF document
    using var document = new Aspose.Pdf.Document(dataDir + "PDFToPDFA.pdf");

    // Setup new file to be added as attachment
    using var fileSpecification = new Aspose.Pdf.FileSpecification(dataDir + "aspose-logo.jpg", "Large Image file");

    // Add attachment to document's attachment collection
    document.EmbeddedFiles.Add(fileSpecification);

    // Perform conversion to PDF/A-3a, so that the attachment is included in the resultant file
    document.Convert(dataDir + "PDFA3aConversionLog.xml", Aspose.Pdf.PdfFormat.PDF_A_3A, Aspose.Pdf.ConvertErrorAction.Delete);

    // Save PDF document
    document.Save(dataDir + "AddAttachmentToPDFA_out.pdf");
}

Mengganti font yang hilang dengan font alternatif

Sesuai dengan standar PDF/A, font harus disematkan dalam dokumen PDF/A. Namun, jika font tidak disematkan dalam dokumen sumber dan tidak ada di mesin, maka konversi PDF/A akan gagal. Dalam hal ini, perlu untuk mengganti font yang hilang dengan beberapa font alternatif yang ada di mesin. Font yang hilang dapat diganti menggunakan kelas SimpleFontSubsitution selama konversi PDF ke PDF/A.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ReplaceMissingFonts()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_DocumentConversion();

    try
    {
        // Check whether a font, used in the source document, is installed in the system
        Aspose.Pdf.Text.FontRepository.FindFont("AgencyFB");
    }
    catch (Aspose.Pdf.FontNotFoundException)
    {
        // Font is missing on the destination machine. Replace it with the Arial font installed in the system
        var fontSubstitution = new Aspose.Pdf.Text.SimpleFontSubstitution("AgencyFB", "Arial");
        Aspose.Pdf.Text.FontRepository.Substitutions.Add(fontSubstitution);
    }

    // Open PDF document
    using (var document = new Aspose.Pdf.Document(dataDir + "PDFToPDFA.pdf"))
    {
        // During the conversion, the missing font will be replaced with the substitution one
        document.Convert(dataDir + "ReplaceMissingFonts.xml", PdfFormat.PDF_A_1B, ConvertErrorAction.Delete);

        // Save PDF document
        document.Save(dataDir + "ReplaceMissingFonts_out.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ReplaceMissingFonts()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_DocumentConversion();

    try
    {
        // Check whether a font, used in the source document, is installed in the system
        Aspose.Pdf.Text.FontRepository.FindFont("AgencyFB");
    }
    catch (Aspose.Pdf.FontNotFoundException)
    {
        // Font is missing on the destination machine. Replace it with the Arial font installed in the system
        var fontSubstitution = new Aspose.Pdf.Text.SimpleFontSubstitution("AgencyFB", "Arial");
        Aspose.Pdf.Text.FontRepository.Substitutions.Add(fontSubstitution);
    }

    // Open PDF document
    using var document = new Aspose.Pdf.Document(dataDir + "PDFToPDFA.pdf");

    // During the conversion, the missing font will be replaced with the substitution one
    document.Convert(dataDir + "ReplaceMissingFonts.xml", PdfFormat.PDF_A_1B, ConvertErrorAction.Delete);

    // Save PDF document
    document.Save(dataDir + "ReplaceMissingFonts_out.pdf");
}

Mengonversi PDF ke EPUB, LaTeX, Teks, XPS dalam C# Mengonversi PDF/A ke format PDF