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Error on Open when pdf file is empty
http://forum.pdfsharp.com/viewtopic.php?f=2&t=4417		 Page 1 of 1
Author:  Jupklass [ Wed Feb 15, 2023 2:01 pm ]
Post subject:  Error on Open when pdf file is empty
There is a error when you try to open a pdf file of size 0.
(try for example to create a empty .txt file and then just change the extension to .pdf)
some pdf files of size 0 could be also the result of a proccess that have not well finish

On PdfReader.cs
Line 296

if (document._version == 0)
throw new InvalidOperationException(PSSR.InvalidPdf);


this should be added (document._version == null)

if ((document._version == null) || (document._version == 0))

in my case also had to modify the catch to this and remove the throw

catch (Exception ex)
{
Debug.WriteLine(ex.Message);

document = new PdfDocument();
document.Close();
}
Author:  TH-Soft [ Thu Feb 16, 2023 10:01 am ]
Post subject:  Re: Error on Open when pdf file is empty
Hi!
Thank you for the feedback.
Jupklass wrote:
There is a error when you try to open a pdf file of size 0.
Stefan and I agree that an empty file is not a valid PDF file and that it is correct that PDFsharp throws an exception when attempting to open such a file.
This is not a bug, it is a feature.

So it is up to the caller to check for files with a size of 0 and use "new PdfDocument()" instead of "PdfReader.Open()" in that case.
Author:  Jupklass [ Mon Feb 20, 2023 1:44 pm ]
Post subject:  Re: Error on Open when pdf file is empty
TH-Soft wrote:
Hi!
This is not a bug, it is a feature.


I agree with with with you. But it dosen´t throw an exception if it´s empty that´s why i place the null condition
Author:  TH-Soft [ Mon Feb 20, 2023 1:48 pm ]
Post subject:  Re: Error on Open when pdf file is empty
Jupklass wrote:
I agree with with with you. But it dosen´t throw an exception if it´s empty
Current internal builds throw when it is empty.
Cannot give an ETA when it will be published.
Author:  Jupklass [ Mon Feb 20, 2023 1:58 pm ]
Post subject:  Re: Error on Open when pdf file is empty
Thank you.
No problem with that :D
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