GroupDocs.Metadata for .NET provides easy ways to manage metadata of various document formats. It enables the user to read, write, update and remove metadata of Word, Excel, PowerPoint & PDF documents as well as images, videos, audios, emails, fonts, diagrams and many other popular file formats.

• Read, update and remove metadata from 60+ file formats.
• Search, update and remove particular metadata properties as per specified criteria.
• Use tags to easily manipulate most common metadata properties in a unified manner.
• Load password-protected documents.
• Extract information about hidden document pages, digital signatures, user comments, revisions, etc.
• Supports many popular metadata standards, such as, IPTC, XMP, EXIF, Image Resources.
• Manipulate native metadata properties in various formats.
• Extract technical information from images, audio and video files.
• Calculate common document statistics (word count, character count, etc.).
• Auto-detect the format and MIME type of file by its internal structure.
• Work with various audio tags (ID3, Lyrics, APE).
• Traverse a whole metadata tree.
• Work with the APEv2, ID3v1, ID3v2, Lyrics & other tags of MP3 metadata.

Microsoft Word: DOC, DOT, DOCX, DOCM, DOTX
Microsoft Excel: XLSX, XLSM, XLTM, XLS
Microsoft PowerPoint: PPTX, PPTM, PPSX, PPSM, POTX, POTM, PPT, PPS
Microsoft Visio: VSD, VDX, VSDX, VSS, VSX
Microsoft OneNote: ONE
Microsoft Project: MPP
OpenOffice: ODS, ODT, OTF, OTC
Audio: MP3, WAV
Video: AVI, MOV / QT, ASF, FLV
Email: EML, MSG, VCF, VCR
Image: BMP, GIF, JPG, JPEG, JPE, JP2, PNG, TIFF, DICOM, WEBP
Archive: ZIP
Font: TTF, TTC
Metafile: EMF, WMF
Adobe Photoshop: PSD
AutoCAD: DWG, DXF
Portable: PDF
eBook: EPUB, DJVU, DJV
Other: TORRENT

Microsoft Windows: Windows Desktop & Server (x86, x64), Windows Azure
macOS: Mac OS X
Linux: Ubuntu, OpenSUSE, CentOS, and others
Development Environments: Microsoft Visual Studio, Xamarin.Android, Xamarin.IOS, Xamarin.Mac, MonoDevelop 2.4 and later
Supported Frameworks: .NET Framework 2.0 or higher, .NET Standard 2.0, .NET Core 2.1 & 2.0, Mono Framework 1.2 or higher

Are you ready to give GroupDocs.Metadata for .NET a try? Simply execute Install-Package GroupDocs.Metadata from Package Manager Console in Visual Studio to fetch & reference GroupDocs.Metadata assembly in your project. If you already have GroupDocs.Metadata for .NET and want to upgrade it, please execute Update-Package GroupDocs.Metadata to get the latest version.

using (Metadata metadata = new Metadata(Constants.InputPdf))
{
    // Remove detected metadata packages
    var affected = metadata.Sanitize();
    Console.WriteLine("Properties removed: {0}", affected);

    metadata.Save(Constants.OutputPdf);
}

foreach (string file in Directory.GetFiles(Constants.InputPath))
{
    using (Metadata metadata = new Metadata(file))
    {
        if (metadata.FileFormat != FileFormat.Unknown && !metadata.GetDocumentInfo().IsEncrypted)
        {
            Console.WriteLine();
            Console.WriteLine(file);

            // fetch all metadata properties that fall into a particular category
            var properties = metadata.FindProperties(p => p.Tags.Any(t => t.Category == Tags.Content));
            Console.WriteLine("The metadata properties describing some characteristics of the file content: title, keywords, language, etc.");
            foreach (var property in properties)
            {
                Console.WriteLine("{0} = {1}", property.Name, property.Value);
            }

            // fetch all properties having a specific type and value
            var year = DateTime.Today.Year;
            properties = metadata.FindProperties(p => p.Value.Type == MetadataPropertyType.DateTime &&
                                                     p.Value.ToStruct(DateTime.MinValue).Year == year);

            Console.WriteLine("All datetime properties with the year value equal to the current year");
            foreach (var property in properties)
            {
                Console.WriteLine("{0} = {1}", property.Name, property.Value);
            }
        }
    }
}

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