Définir les métadonnées XMP d'un PDF existant

Pour définir des métadonnées XMP dans un fichier PDF, vous devez créer un objet PdfXmpMetadata et lier le fichier PDF en utilisant la méthode BindPdf. Vous pouvez utiliser la méthode Add de la classe PdfXmpMetadata pour ajouter différentes propriétés. Enfin, appelez la méthode Save de la classe PdfXmpMetadata. Le code suivant vous montre comment ajouter des métadonnées XMP dans un fichier PDF.

.NET Core 3.1

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

    // Create PdfXmpMetadata object
    using (var xmpMetaData = new Aspose.Pdf.Facades.PdfXmpMetadata())
    {
        // Bind PDF document
        xmpMetaData.BindPdf(dataDir + "SetXMPMetadata.pdf");

        // Add create date
        xmpMetaData.Add(Aspose.Pdf.Facades.DefaultMetadataProperties.CreateDate, DateTime.Now.ToString());

        // Change meta data date
        xmpMetaData[Aspose.Pdf.Facades.DefaultMetadataProperties.MetadataDate] = DateTime.Now.ToString();

        // Add creator tool
        xmpMetaData.Add(Aspose.Pdf.Facades.DefaultMetadataProperties.CreatorTool, "Creator tool name");

        // Remove modify date
        xmpMetaData.Remove(Aspose.Pdf.Facades.DefaultMetadataProperties.ModifyDate);

        // Add user defined property
        // Register namespace prefix and URI
        xmpMetaData.RegisterNamespaceURI("customNamespace", "http:// Www.customNameSpaces.com/ns/");

        // Add user property with the prefix
        xmpMetaData.Add("customNamespace:UserPropertyName", "UserPropertyValue");

        // Change user defined property
        xmpMetaData["customNamespace:UserPropertyName"] = "UserPropertyValue2";

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

.NET 8

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

    // Create PdfXmpMetadata object
    using var xmpMetaData = new Aspose.Pdf.Facades.PdfXmpMetadata();

    // Bind PDF document
    xmpMetaData.BindPdf(dataDir + "SetXMPMetadata.pdf");

    // Add create date
    xmpMetaData.Add(Aspose.Pdf.Facades.DefaultMetadataProperties.CreateDate, DateTime.Now.ToString());

    // Change meta data date
    xmpMetaData[Aspose.Pdf.Facades.DefaultMetadataProperties.MetadataDate] = DateTime.Now.ToString();

    // Add creator tool
    xmpMetaData.Add(Aspose.Pdf.Facades.DefaultMetadataProperties.CreatorTool, "Creator tool name");

    // Remove modify date
    xmpMetaData.Remove(Aspose.Pdf.Facades.DefaultMetadataProperties.ModifyDate);

    // Add user defined property
    // register namespace prefix and URI
    xmpMetaData.RegisterNamespaceURI("customNamespace", "http:// Www.customNameSpaces.com/ns/");

    // Add user property with the prefix
    xmpMetaData.Add("customNamespace:UserPropertyName", "UserPropertyValue");

    // Change user defined property
    xmpMetaData["customNamespace:UserPropertyName"] = "UserPropertyValue2";

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