how to hide all the annotations in a pdf file

glzlaohuai
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IP: 192.168.0.71 8 years 7 months ago #12682 by glzlaohuai

how to hide all the annotations in a pdf file was created by glzlaohuai

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

Code:

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

nermeen
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IP: 192.168.0.71 8 years 7 months ago - 8 years 7 months ago #12683 by nermeen

Replied by nermeen on topic how to hide all the annotations in a pdf file

You need to first call

Code:

Page.ObjsStart

Code:

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?

Last edit: 8 years 7 months ago by nermeen.

glzlaohuai
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IP: 192.168.0.71 8 years 7 months ago #12684 by glzlaohuai

Replied by glzlaohuai on topic how to hide all the annotations in a pdf file

OK, thanks, I have a try.

glzlaohuai
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IP: 192.168.0.71 8 years 7 months ago #12685 by glzlaohuai

Replied by glzlaohuai on topic how to hide all the annotations in a pdf file

it works, thank you. :woohoo:

军罗
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IP: 45.77.124.47 7 years 10 months ago #13793 by 军罗

Replied by 军罗 on topic how to hide all the annotations in a pdf file

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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