GroupDocs.Annotation for .NET offers advance set of APIs to add, edit or customize annotations to document pages in C#, ASP.NET and any type of .NET applications. You can easily annotate a variety of business documents like Microsoft Word, Excel, PowerPoint, PDF, OpenDocument, AutoCAD, Diagrams and image files with a variety of annotation types including area, point, text, ellipse, link, underline, polyline, arrow, distance and watermark.
Text-Replacement, Text-Redaction and exporting annotations to multi-page TIFF files are newly supported unique features of GroupDocs.Annotation to let developers manage annotations according to customized requirements.
Supported Features
GroupDocs.Annotation for .NET supports many comprehensive sets of features including:
Graphics annotations
- Area – marks an area with a rectangle and adds notes to it
- Arrow – draws an arrow on a document
- Distance – measures a distance between objects in a document
- Point – sticks comments to any point in a document
- Polyline – draws shapes and freehand lines
- Redaction – fills black rectangle with fixed position (used if you want to hide some text)
- TextField – adds rectangle with text inside
- Ellipse – draws elliptic annotation on document
Text annotations
- Highlight – highlights and comments on selected text
- Redaction – fills black rectangle with fixed position (used if you want to hide some text)
- Replacement – replaces original text with user’s text
- Strikeout – marks text with strikethrough styling
- Underline – marks text with underline styling
Watermark annotations
- Horizontal textual watermark
- Diagonal textual watermark (in all formats except Word)
Export Annotation API
- Export specific range of document pages
- Export only those pages that contains annotations or annotation types
- Export clean document without annotations
- Combine all options above
Collaboration API
- Supports setting up collaboration when several persons work with the same document
- Manage collaborators, annotations, annotation permissions, annotation replies
Obtaining document pages as Images
- Obtain specific page by number, page range or selective pages
Import and export annotations to & from PDF files
Platform Independence
GroupDocs annotation API supports .NET framework and enables developers to build feature rich document annotation applications on Microsoft Windows Desktop, Azure and Server operating systems.
Support and Learning Resources
- Documentation – Access developers guide, features overview, installation, limitations and configurations settings
- Source Code – Work with functional source code examples, showcases and plugins
- Download API directly or via Nuget package manager
- API Reference Guide
- Forum support – Get assistance on your technical queries by our team of experts
- Blog – Subscribe and receive all updates on latest enhancement and newly supported features
