获取 PDF 文件的 XMP 元数据

为了从 PDF 文件中获取 XMP 元数据，您需要创建 PdfXmpMetadata 对象，并使用 BindPdf 方法绑定 PDF 文件。您可以将特定的 XMP 元数据属性传递给 PdfXmpMetadata 对象以获取其值。以下代码片段向您展示了如何从 PDF 文件中获取 XMP 元数据。

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void GetXmpMetadata()
{
    // 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 + "GetXMPMetadata.pdf");

        // Get XMP Meta Data properties
        Console.WriteLine(": {0}", xmpMetaData[Aspose.Pdf.Facades.DefaultMetadataProperties.CreateDate].ToString());
        Console.WriteLine(": {0}", xmpMetaData[Aspose.Pdf.Facades.DefaultMetadataProperties.MetadataDate].ToString());
        Console.WriteLine(": {0}", xmpMetaData[Aspose.Pdf.Facades.DefaultMetadataProperties.CreatorTool].ToString());
        Console.WriteLine(": {0}", xmpMetaData["customNamespace:UserPropertyName"].ToString());

        Console.ReadLine();
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void GetXmpMetadata()
{
    // 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 + "GetXMPMetadata.pdf");

    // Get XMP Meta Data properties
    Console.WriteLine(": {0}", xmpMetaData[Aspose.Pdf.Facades.DefaultMetadataProperties.CreateDate].ToString());
    Console.WriteLine(": {0}", xmpMetaData[Aspose.Pdf.Facades.DefaultMetadataProperties.MetadataDate].ToString());
    Console.WriteLine(": {0}", xmpMetaData[Aspose.Pdf.Facades.DefaultMetadataProperties.CreatorTool].ToString());
    Console.WriteLine(": {0}", xmpMetaData["customNamespace:UserPropertyName"].ToString());

    Console.ReadLine();
}