How to check if a pdf file is open in and close it in c++

Question

I want to move to a page in a pdf file in c++. I use shellExecute and it works fine. But if the file has been opened before, it will not go to destination page. I want to check if the file is open and close it before using shellExecute command. How can I do it and is there any better way?

I fail to see the C++ question here. For that matter I fail to see a shell question here. It might be related to PDF. Most probably this depends strongly on the particular PDF reader you're using. There are many. — Cheers and hth. - Alf, Jun 16 '15 at 09:37
what do you want to do with the PDF? Do you only want to check if the PDF is open? Or do you want to manipulate the PDF? — CML, Jun 16 '15 at 10:18

score 0 · Answer 1 · answered Jun 16 '15 at 10:19

0

You can use

is_open()

to check if a file is opened or not. I think you have to include iostream and/or fstream. Not sure..

Maybe this question will help you: Question

answered Jun 16 '15 at 10:19

CML

353
7
18

score 0 · Answer 2 · answered Jun 16 '15 at 10:22

0

Use these lines of code

std::ifstream ifs ("test.pdf");

if (ifs.is_open()) {
  ifs.close();
}

answered Jun 16 '15 at 10:22

shihab mm

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5
15

I use it but the is_open always returns ture – maryamT Jun 16 '15 at 10:48
`std::ifstream ifs ("test.pdf");` will automatically open the file we specified as parameter. – shihab mm Jun 16 '15 at 10:55
so how can I check if a pdf file is open? – maryamT Jun 16 '15 at 11:01
I think file stream will give some error if we are trying to open already opened file. you can catch it by adding try catch block. – shihab mm Jun 16 '15 at 11:27
I do your suggestion in this cod" – maryamT Jun 17 '15 at 05:47

How to check if a pdf file is open in and close it in c++

2 Answers2