How to export PDF to image without annotation using PDF Viewer?
While export page of the PDF document into an image using ExportAsImage method, the exported image will contain all the annotations in that page. WPF PDF Viewer does not have direct support to export a PDF to image without annotations, but this can be achieved by hide annotation before exporting.
Steps to export PDF to image without annotations
The following steps illustrate how to hide the annotation before exporting and unhide the annotation after exporting using the WPF PDF Viewer.
Step 1: Hide the annotation from the pages:
- Iterate the annotations in the page and hide the annotation using `HideAnnotation` method with annotation name and its page number.
C#
foreach (PdfAnnotation annotation in page.Annotations)
{
// Hide the annotation using the annotation name and its page number.
pdfViewerControl.HideAnnotation(annotation.Name, j + 1);
}
Step 2: Export pdf pages:
- Export pdf pages using `ExportAsImage` method in PDF Viewer.
C#
//Export the pdf pages without annotations. BitmapSource[] image = pdfViewerControl.ExportAsImage(0, pageCount - 1);
Step 3: Show the annotation from the pages:
- After exporting the image, we can unhide the annotations using `ShowAnnotation` method.
C#
foreach (PdfAnnotation annotation in page.Annotations)
{
//Show the annotation using the annotation name and its page number.
pdfViewerControl.ShowAnnotation(annotation.Name, j + 1);
}
See also:
- Working with annotations programmatically
- Hide an annotation
- Show an annotation
- Exporting PDF pages in WPF Pdf Viewer
Conclusion
I hope you enjoyed learning about how to export PDF to image without annotation using PDF Viewer.
You can refer to our WPF PDF Viewer feature tour page to know about its other groundbreaking feature representations. You can also explore our WPF PDF Viewer documentation to understand how to present and manipulate data.
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