TOPIC:

how to hide all the annotations in a pdf file 6 years 8 months ago #12682

glzlaohuai
Topic Author
Offline
New Member
Posts: 4
Thank you received: 0

hi, I want to hide or remove all the annotations in a pdf file. My code is below:

Document doc = PDFGetDoc();
        int pageCount = doc.GetPageCount();
        for (int i = 0; i < pageCount; i++) {
            Page page = doc.GetPage(i);
            int annCount = page.GetAnnotCount();
            for (int j = 0; j < annCount; j++) {
                Annotation annotation = page.GetAnnot(j);
                if (annotation != null) {
                    annotation.SetHide(true);
                }
            }
        }

My question is that GetAnnot(annitationIndex) sometimes return null, so how can I remove or hide all the annotations in a pdf file, thanks

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how to hide all the annotations in a pdf file 6 years 8 months ago #12683

nermeen
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Platinum Member
Posts: 962
Thank you received: 87

You need to first call

Page.ObjsStart

Document doc = PDFGetDoc();
        int pageCount = doc.GetPageCount();
        for (int i = 0; i < pageCount; i++) {
            Page page = doc.GetPage(i);
            page.ObjsStart();
            int annCount = page.GetAnnotCount();
            for (int j = 0; j < annCount; j++) {
                Annotation annotation = page.GetAnnot(j);
                if (annotation != null) {
                    annotation.SetHide(true);
                }
            }
        }

If you still have problems, can you please share the pdf file and they way you are calling the above code?

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Last edit: by nermeen.

how to hide all the annotations in a pdf file 6 years 8 months ago #12684

glzlaohuai Topic Author Offline New Member Posts: 4 Thank you received: 0	OK, thanks, I have a try.
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how to hide all the annotations in a pdf file 6 years 8 months ago #12685

glzlaohuai Topic Author Offline New Member Posts: 4 Thank you received: 0	it works, thank you.
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how to hide all the annotations in a pdf file 5 years 11 months ago #13793

军罗 Offline New Member Posts: 2 Thank you received: 0	it doesn't work here。https://www.radaeepdf.com/forum/Android-development/4067-how-to-hide-a-button-of-mutilmedia-in-pdf-file
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how to hide all the annotations in a pdf file