groupdocs-annotation/GroupDocs.Annotation-for-.NET

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.NET API for Document Annotation

GroupDocs.Annotation for .NET is a lightweight, yet powerful .NET library that seamlessly integrates document annotation features into your .NET applications. Apply graphic, text and watermark annotations on Office, OpenOffice, PDF documents as well as images & CAD drawings with simplest object model.

Directory	Description
Demos	GroupDocs.Annotation for .NET Demo projects.
Examples	Contains the package of all .NET C# examples and sample files that will help you learn how to use product features.

Annotate Documents & Images via .NET Library

Import document annotations.
Add, remove or reply to annotation comments.
Export annotated document back to its original format.
Render document pages as images.
Generate document thumbnails or document image preview.
Support for local cache 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.).

Microsoft Office Formats

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

Annotation Objects

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

Develop & Deploy GroupDocs.Annotation Anywhere

Frameworks: NET Standard 2.0, .NET Framework 2.0 or higher, .NET Core 2.0 or higher, Mono Framework 1.2 or higher\ Operating Systems: Linux, Mac OS X, Windows Desktop (x86 & x64), Windows Server (x86 & x64), Windows Azure\ Development Environments: Microsoft Visual Studio, Xamarin.Android, Xamarin.IOS, Xamarin.Mac, MonoDevelop

Getting 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.

Use C# Code to Save Annotated PDF Pages

// for this example input file ("input.pdf") must have at least 10 pages
using (Annotator annotator = new Annotator(“input.pdf”))
{
    AreaAnnotation area = new AreaAnnotation()
    {
        Box = new Rectangle(100, 100, 100, 100),
        BackgroundColor = 65535,
        PageNumber = 1
    };
    EllipseAnnotation ellipse = new EllipseAnnotation()
    {
        Box = new Rectangle(100, 100, 100, 100),
        BackgroundColor = 123456,
        PageNumber = 9
    };
    annotator.Add(new List<AnnotationBase>() { area, ellipse });
    annotator.Save(“result.pdf” new SaveOptions { OnlyAnnotatedPages = true});
}