GroupDocs.Annotation 21.3.0

.NET API for Document Annotation

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It's an on-premise API that seamlessly integrates document annotation features into your .NET applications. Apply graphic, text, and watermark annotations.

Document Annotation via .NET

• Import document annotations.
• Add, remove, or reply to annotation comments.
• Render document pages as images.
• Generate document thumbnails or document image preview.
• Support for default cache (local disk) or custom cache (Amazon S3, Dropbox, etc.).
• Get list of supported file formats.
• Fetch document information, such as page count & file size.
• Extract annotations from a document and serialize to XML format.
• Remove previously added annotations from a document.
• Update specific annotation properties (size, color, etc.).

Supported Annotation Objects

Graphic Annotation: Area, Arrow, Distance, Point, Polyline, Redaction, TextField, Ellipse Text Annotation: Highlight, Replacement, Strikeout, Underline Watermark: Horizontal, Diagonal

Support Microsoft Office Formats for Annotation

Microsoft Word: DOC, DOCM, DOCX, DOT, DOTM, DOTX, RTF
Microsoft Excel: XLS, XLSB, XLSM, XLSX
Microsoft PowerPoint: PPT, PPTX, PPSX, PPS
Microsoft Visio: VSD, VSDX, VSS, VST

Other Document Formats

Portable: PDF (PDF/A-1a, PDF/A-1b, PDF/A-2a)
OpenDocument: ODT, ODS, ODP
Images: TIF, TIFF, JPG, JPEG, PNG, BMP
Medical Imaging: DCM
AutoCAD: DWG, DXF
Email: EML
Web: HTML

Supported Platforms

GroupDocs.Annotation for .NET supported platforms are listed below: .NET Standard 2.0: Any type of .NET Standard 2.0 application is supported (since Q4 2019).
.NET Framework: Any type of .NET Framework version 2.0 (or later) application is supported - ASP.NET, Web Services, WinForms, WPF, and others. Full support for 32-bit and 64-bit.
Windows Azure: GroupDocs.Annotation for .NET runs on Windows Azure.
Mono: You can use GroupDocs.Annotation for .NET to build applications with Mono.

Get Started with GroupDocs.Annotation for .Net

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

Please check the GitHub Repository for other common usage scenarios.

Use C# Code to Extract Annotations from PDF File

// for using this example input file ("annotated.pdf") must be with annotations
using(Annotator annotator = new Annotator("annotated.pdf")) {
   List < AnnotationBase > annotations = annotator.Get();
   XmlSerializer formatter = new XmlSerializer(typeof (List < AnnotationBase > ));
   using(FileStream fs = new FileStream("annotations.xml", FileMode.Create)) {
      fs.SetLength(0);
      formatter.Serialize(fs, annotations);
   }
}

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