Get PDF file information

In order to get file specific information of a PDF file, you need to create an object of PdfFileInfo class. After that, you can get values of the individual properties like Subject, Title, Keywords and Creator etc.

The following code snippet shows you how to get PDF file information.

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void GetPdfInfo()
{
    // Define the directory for input files
    var dataDir = RunExamples.GetDataDir_AsposePdf();

    // Open PDF document
    using (var fileInfo = new Aspose.Pdf.Facades.PdfFileInfo(dataDir + "sample.pdf"))
    {
        // Get and display PDF information
        Console.WriteLine("Subject: {0}", fileInfo.Subject);
        Console.WriteLine("Title: {0}", fileInfo.Title);
        Console.WriteLine("Keywords: {0}", fileInfo.Keywords);
        Console.WriteLine("Creator: {0}", fileInfo.Creator);
        Console.WriteLine("Creation Date: {0}", fileInfo.CreationDate);
        Console.WriteLine("Modification Date: {0}", fileInfo.ModDate);

        // Check if the file is a valid PDF and if it is encrypted
        Console.WriteLine("Is Valid PDF: {0}", fileInfo.IsPdfFile);
        Console.WriteLine("Is Encrypted: {0}", fileInfo.IsEncrypted);

        // Get dimensions of the first page
        Console.WriteLine("Page width: {0}", fileInfo.GetPageWidth(1));
        Console.WriteLine("Page height: {0}", fileInfo.GetPageHeight(1));
    }
}

Get Meta Info

In order to get information, we use the Header property. With ‘Hashtable’ we get all the possible values.

 // For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void GetMetaInfo()
{
    // Define the directory for input files
    var dataDir = RunExamples.GetDataDir_AsposePdf();

    // Create an instance of PdfFileInfo object
    using (var fileInfo = new Aspose.Pdf.Facades.PdfFileInfo(dataDir + "SetMetaInfo_out.pdf"))
    {
        // Retrieve all existing custom attributes
        var hashTable = new System.Collections.Hashtable(fileInfo.Header);

        // Enumerate and display all custom attributes
        var enumerator = hashTable.GetEnumerator();
        while (enumerator.MoveNext())
        {
            string output = $"{enumerator.Key} {enumerator.Value}";
            Console.WriteLine(output);
        }

        // Retrieve and display a specific custom attribute
        Console.WriteLine("Reviewer: " + fileInfo.GetMetaInfo("Reviewer"));
    }
}