GroupDocs.Annotation 20.4.0

.NET API for Document Annotation

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

Document Annotation Processing Features

• Import document annotations.
• Support for adding, removing or replying 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 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.).

New Features in Version 20.4

• Managing different versions of annotated file (supported formats: Words, PDF, Slides, SpreadSheets).

Enhancements in Version 20.4

• Added to new API getting pages image size.
• Added advanced rendering options for show\hide replies.

For the detailed list, please visit GroupDocs.Annotation for .NET 20.4 Release Notes.

Microsoft Office Annotation 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

Other Annotation Formats

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

Supported Graphic Annotation Types

Area: marks an area with a rectangle
Arrow: draws an arrow on a document
Distance: measures a distance between objects in a document
Ellipse: draws elliptic annotation in a document
Point: sticks comments to any point in a document
Polyline: draws shapes and freehand lines
Resource Redaction: fills black rectangle with fixed position
TextField: adds rectangle with a text inside

Supported Text Annotation Types

Highlight: highlights and comments selected text
Link: adds a hyperlink to the document
Replacement: replaces original text with user’s text
Strikeout: marks text with a strikethrough styling
Text Redaction: fills part of text with black rectangle
Underline: marks text with an underline styling

Supported Watermark Annotation Types

Diagonal: adds diagonal text watermark
Horizontal: adds horizontal text watermark

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.

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.

Please check the GitHub Repository for other common usage scenarios.

Use C# Code to Save Annotation-only Pages of PDF File

// 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});
}

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