Add text redaction annotation

Text redaction annotation fills part of text with black rectangle (used if you want to hide some text) like shown at the picture below.

There is an ability to specify the next properties for TextRedactionAnnotation type

  • Points - annotation positions set by array of points.

Follow these steps to add text redaction annotation to document:

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

//Add text redaction annotation to the document from local disk
using (Annotator annotator = new Annotator("input.pdf"))
{
	TextRedactionAnnotation textRedaction = new TextRedactionAnnotation
    {
    	CreatedOn = DateTime.Now,
        Message = "This is text redaction annotation",
        PageNumber = 0,
        Points = new List<Point>
        {
        	new Point(80, 730), new Point(240, 730), new Point(80, 650), new Point(240, 650)
        },
        Replies = new List<Reply>
        {
        	new Reply
            {
            	Comment = "First comment",
                RepliedOn = DateTime.Now
            },
            new Reply
            {
            	Comment = "Second comment",
                RepliedOn = DateTime.Now
            }
         }
     };
     annotator.Add(textRedaction);
     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.