Annotation visibility in the PDFViewer

[Oussama Melki]

Hello,

I started using the PdfViewerControl (winform C#) to load and annotate documents which works perfectly, except that the annotation is not visible in the PdfViewerControl?

• I see the Markup annotation (Yellow) when I open the PDF using Adobe Acrobat
• I see a hand mouse cursor when I hover over the annotation in the PdfViewerControl but nothing elese

The PDFViewerDocument

Am I missing something? thank you.

PdfTextMarkupAnnotation textMarkupAnnotation = new PdfTextMarkupAnnotation(allBounds[0])
                        {
                            TextMarkupAnnotationType = PdfTextMarkupAnnotationType.Highlight,
                            Color = new PdfColor(Color.Yellow),
                            Opacity = 0.5f,
                            Text = annotationComment,
                            TextMarkupColor = Color.Yellow
                        };
textMarkupAnnotation.Bounds = boundingBox;
                        page.Annotations.Add(textMarkupAnnotation);

[Yathavakrishnan Mohan]

Hi Oussama,

In WinForms PdfViewer, Currently  we don't have support for viewing annotations. As a workaround, we need to flatten the annotations before loading the document in the PDFViewer. Please refer below code snippet for demonstrating how to flatten annotations and load the document:

 PdfLoadedDocument loadedDocument = new PdfLoadedDocument("D:\\Input.pdf");

 

//Flatten the annotations present in the PDF document

 loadedDocument.FlattenAnnotations();

 

 PDFViewer.Load(loadedDocument);

 

Additionally, we have created a sample for your reference and attached it below

We highly recommend using the WPF PdfViewer hosted in a WinForms application instead of the WinForms PdfViewer. The WPF PdfViewer allows you to view the Annotations in document . For your reference, we have provided a sample link demonstrating this integration.

Sample link: GitHub Sample Link

UG Link:
Enhance WinForms PdfViewer with WPF Features | Syncfusion®

Documentation Link: Annotations in WPF Pdf Viewer control | Syncfusion

For Annotations in WPF PdfViewer, please refer to the sample link below.

Sample Link: WPF-PDFViewer-Examples/Annotations at master · SyncfusionExamples/WPF-PDFViewer-Examples

Regards,
Yathavakrishnan M

Attachment: WinForms_PDFViewer_9728eed2.zip

[Oussama Melki]

Thanks a lot for your quick response :) 

I will try the WPF component first and will update the thread!

Thanks.

[Oussama Melki]

hello there, just a friendly reminder for anyone having the same issue that using the WPF component worked like a charm :) 

[Krithika Ganesan]

We are glad that you found the solution. Please let us know if you need any further assistance.