Remove text from PDF

GemBox.Pdf
1

Hi Mario

My task is:

  1. Load PDF file
  2. Find text “Hello”
  3. Remove this text
  4. Save to PDF again

I am trying the next:

var page = document.Pages[0];
var textElement = page.Content.FindText("HELLO").OfType<PdfTextContent>().Reverse();
textElement.Collection.Remove(textElement);
2

Hi,

Try this:

var page = document.Pages[0];
foreach (var text in page.Content.GetText().Find("HELLO"))
    text.Redact();

Does this work for you?

Regards,
Mario

3

Hi Mario. Thanks It works!
But May I ask you how to change “HELLO” on another word “Thanks” and save to pdf again. I mean Find and Replace text in PDF.

4

GemBox.Pdf currently doesn’t have an API for “Find and Replace”, but we do intend to provide one in the future.
For now, can you try using something like this:

var page = document.Pages[0];
var pageContent = page.Content;
var texts = pageContent.GetText().Find("HELLO").ToList();

foreach (var text in texts)
{
    using var formattedText = new PdfFormattedText();
    formattedText.Append("Thanks");
    pageContent.DrawText(formattedText, new PdfPoint(text.Bounds.Left, text.Bounds.Bottom));
    text.Redact();
}
5

Thanks. It works perfectly.