Modify Annotations in your PDF

Modify annotation

ModifyAnnotations method allows you to change basic attributes of an annotation i.e. Subject, Modified date, Author, Annotation color, and Open flag. You can also set Author directly by using ModifyAnnotations method. This class also provides two overloaded methods to delete annotations. The first method called DeleteAnnotations deletes all the annotations from a PDF file.

For example, in the following code, consider changing the author in our annotation using ModifyAnnotationsAuthor.

// For complete examples and data files, please go to https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ModifyAnnotationsAuthor()
{
    // The path to the documents directory
    string dataDir = RunExamples.GetDataDir_AsposePdf();
    // Create PdfAnnotationEditor
    using (var annotationEditor = new Aspose.Pdf.Facades.PdfAnnotationEditor())
    {
        // Bind PDF document
        annotationEditor.BindPdf(dataDir + "input.pdf");
        // Modify annotations author
        annotationEditor.ModifyAnnotationsAuthor(1, 2, "Aspose User", "Aspose.PDF user");
        // Save document
        annotationEditor.Save(dataDir + "ModifyAnnotationsAuthor_out.pdf");
    }
}

The second method allows you to delete all the annotations of a specified type.

// For complete examples and data files, please go to https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ModifyAnnotations()
{
    // The path to the documents directory
    string dataDir = RunExamples.GetDataDir_AsposePdf();
    // Open document
    using (var document = new Aspose.Pdf.Document(dataDir + "input.pdf"))
    {
        // Create PdfAnnotationEditor
        using (var annotationEditor = new Aspose.Pdf.Facades.PdfAnnotationEditor())
        {
            // Bind PDF document
            annotationEditor.BindPdf(document);
            // Create a new object of type Annotation to modify annotation attributes
            var defaultAppearance = new Aspose.Pdf.Annotations.DefaultAppearance();
            var annotation = new Aspose.Pdf.Annotations.FreeTextAnnotation(
                document.Pages[1],
                new Aspose.Pdf.Rectangle(1, 1, 1, 1),
                defaultAppearance)
            {
                // Set new annotation attributees
                Title = "Aspose.PDF Demo User",
                Subject = "Technical Article"
            };
            // Modify annotations in the PDF file
            annotationEditor.ModifyAnnotations(1, 1, annotation);
            // Save document
            annotationEditor.Save(dataDir + "ModifyAnnotations_out.pdf");
        }
    }
}

Modify Annotations in your PDF

Modify annotation

See also