GroupDocs.Metadata 21.4.0

.NET API for Metadata Processing

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This .NET API can be consumed to integrate metadata viewer, editor, reader, writer, and remover operations within your .NET apps.

Document Metadata Processing Features

• Read, update, and remove metadata in a variety of formats.
• Search, update, and remove particular metadata properties as per specified predicate.
• Use tags to easily manipulate the most common metadata properties in a unified manner.
• Work with 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.).
• Detect the format and MIME type of a file by its internal structure.
• Work with various audio tags (ID3, Lyrics, APE).
• Load file from a local disk or a stream.
• Load a file of a specific format or load a password-protected file.
• Traverse a whole metadata tree.
• Work with the APEv2, ID3v1, ID3v2, Lyrics & other tags of MP3 metadata.

Read & Write Metadata Formats

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, HEIF / HEIC
Archive: ZIP
Font: TTF, TTC
Metafile: EMF, WMF
Adobe Photoshop: PSD
AutoCAD: DWG, DXF
Portable: PDF
eBook: EPUB, DJVU, DJV
Other: TORRENT

Platform Independence

GroupDocs.Metadata for .NET does not require any external software or third-party tool to be installed. GroupDocs.Metadata for .NET support any 32-bit or 64-bit operating system where .NET or Mono framework is installed. The other details are as follows:

Microsoft Windows: Microsoft Windows Desktop (x86, x64) (XP & up), Microsoft Windows Server (x86, x64) (2000 & up), Windows Azure
Mac OS: Mac OS X
Linux: Linux (Ubuntu, OpenSUSE, CentOS and others)
Development Environments: Microsoft Visual Studio (2010 & up), Xamarin.Android, Xamarin.IOS, Xamarin.Mac, MonoDevelop 2.4 and later.
Supported Frameworks: GroupDocs.Conversion for .NET supports .NET and Mono frameworks.

Get Started

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.

Please check the GitHub Repository for other common usage scenarios.

Use C# to Remove All Metadata Properties from a File

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);
}

Extract Metadata from Files via C# Code

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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