Add ellipse annotation

Ellipse annotation draws elliptic annotation in a document page like shown at the picture below.

There is an ability to specify the next properties for EllipseAnnotation type: 

  • BackgroundColor - describes ellipse background color;
  • Box - defines annotation position at document page;
  • Opacity - allows to set annotation opacity;
  • PenColor - defines pen color;
  • PenStyle - defines line style (solid, dash, dot etc.);
  • PenWidth - defines line width in pixels. 

Follow these steps to add Ellipse annotation to document:

  • Instantiate Annotator object with input document path or stream;
  • Instantiate EllipseAnnotation object with desired properties (position, page number, etc);
  • Call Add method and pass EllipseAnnotation object;
  • Call Save method with resultant document path or stream.

The following code demonstrates how to add EllipseAnnotation to the document:

//Add ellipse annotation to the document from local disk
using (Annotator annotator = new Annotator("input.pdf"))
{
	EllipseAnnotation ellipse = new EllipseAnnotation
    {
    	BackgroundColor = 65535,
        Box = new Rectangle(100, 100, 100, 100),
        CreatedOn = DateTime.Now,
        Message = "This is ellipse annotation",
        Opacity = 0.7,
        PageNumber = 0,
        PenColor = 65535,
        PenStyle = PenStyle.Dot,
        PenWidth = 3,
        Replies = new List<Reply>
        {
        	new Reply
            {
            	Comment = "First comment",
                RepliedOn = DateTime.Now
            },
            new Reply
            {
            	Comment = "Second comment",
                RepliedOn = DateTime.Now
            }
       }
   };
   annotator.Add(ellipse);
   annotator.Save("result.pdf");
}

More resources

Advanced Usage Topics

To learn more about document annotating features, please refer to the advanced usage section.

GitHub Examples

You may easily run the code above and see the feature in action in our GitHub examples:

Free Online App

Along with full-featured .NET library we provide simple but powerful free Apps. You are welcome to annotate your PDF, DOC or DOCX, XLS or XLSX, PPT or PPTX, PNG and other documents with free to use online GroupDocs Annotation App.