Deleting

• Nov 13, 2018
• 2 minutes to read

The PDF Document Processor can delete text markup annotations specified in the PdfMarkupAnnotationData collection by calling the PdfDocumentProcessor.DeleteMarkupAnnotations method.

To delete a specific markup annotation from a page, call the PdfDocumentProcessor.DeleteMarkupAnnotation method, passing the PdfMarkupAnnotationData object with annotation data as an argument to this method.

To retrieve the markup annotations, call the PdfDocumentProcessor.GetMarkupAnnotationData method, specifying the page number.

Example

This example shows how to delete text markup annotations created by a particular author.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-delete-particular-markup-annotations-from-a-page-t549297

Program.vb

Imports DevExpress.Pdf
Imports System.Linq

Namespace RemoveSpecificMarkupAnnotations

    Friend Class Program
        Shared Sub Main(ByVal args() As String)

            ' Create a PDF Document Processor.
            Using processor As New PdfDocumentProcessor()

                ' Load a document.
                processor.LoadDocument("..\..\Document.pdf")

                For i As Integer = 0 To processor.Document.Pages.Count

                    ' Remove Bill Smith's markup annotations from a page.
                    processor.DeleteMarkupAnnotations(processor.GetMarkupAnnotationData(i).Where(Function(annotation) annotation.Author.Contains("Bill Smith")))

                    ' Save the result document.
                    processor.SaveDocument("..\..\Result.pdf")
                Next i
            End Using
        End Sub
    End Class
End Namespace

Program.cs

using DevExpress.Pdf;
using System.Linq;

namespace RemoveSpecificMarkupAnnotations {

    class Program {
        static void Main(string[] args) {

            // Create a PDF Document Processor.
            using (PdfDocumentProcessor processor = new PdfDocumentProcessor()) {

                // Load a document.
                processor.LoadDocument("..\\..\\Document.pdf");

                for (int i = 0; i <= processor.Document.Pages.Count; i++) {

                    // Remove Bill Smith's markup annotations from a page.
                    processor.DeleteMarkupAnnotations(processor.GetMarkupAnnotationData(i)
                    .Where(annotation => annotation.Author.Contains("Bill Smith")));

                    // Save the result document.
                    processor.SaveDocument("..\\..\\Result.pdf");
                }
            }
        }
    }
}