I need help - I can help - Extract only the first page instead off all pages

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Extract only the first page instead off all pages

Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=3323
Printed Date: 29 Sep 24 at 12:24AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: Extract only the first page instead off all pages

Posted By: Mimouni
Subject: Extract only the first page instead off all pages
Date Posted: 10 May 16 at 2:06PM

Hi,

I have a strange behavior with QuickPDFNet0916x64

In a snippet code i loop through pdf pages and i try to extract them, but instead of having expected pages i have x times the first one.

for( int n = 1; n < TotalPages; n++ )

{

int extractPageSuccess = QP.ExtractPages( n, 1 );

if( extractPageSuccess == 0 )

{

log.ErrorFormat( "Unable to extract the page number {0}/{1} from the publication", n, TotalPages );

}

else

{

string pdfPageFullPath = Path.Combine( PdfLocalDirectory.FullName, index.ToString().PadLeft( 3, '0' ) + ".pdf" );

QP.SaveToFile( pdfPageFullPath );

log.InfoFormat( "extract the page number {0}/{1} from the publication", n, TotalPages );

splittedPages.Add( new FileInfo( pdfPageFullPath ) );

}

index++;

}

Replies:

Posted By: Mimouni
Date Posted: 10 May 16 at 3:32PM

we will purchase the last version of QuickPdf(v12) and we hope that will be fine

Posted By: tfrost
Date Posted: 10 May 16 at 5:02PM

I think you have missed this sentence in the manual for ExtractPages: "If successful, the new document will be selected and the original document will be removed from memory".

So after your first extraction, does not the 'current document' become the single-page extract?

Posted By: Mimouni
Date Posted: 10 May 16 at 5:18PM

Hi tfrost,

I'm using the documentation of QuickPdf and I don't find this sentence.

The problem is that the same snippet of code worked for older version of QuickPdf and now we have trouble with him

Posted By: Ingo
Date Posted: 10 May 16 at 5:40PM

Hi Mimouni,

please read here:

http://www.debenu.com/docs/pdf_library_reference/ExtractPages.php

...and here (tfrost is right):

http://www.quickpdf.org/forum/please-help-how-to-extract-pages-from-file_topic2466.html

Cheers and welcome here,

Ingo

-------------
Cheers,
Ingo

Posted By: Mimouni
Date Posted: 10 May 16 at 8:59PM

Thank you Ingo,

If i understood the concept, i should re-select in momory the original pdf document
so, i must add a call of selectDocument function in the beginin of each loop?

Posted By: Ingo
Date Posted: 10 May 16 at 9:25PM

Hi,

why not use the much easier ExtractFilePages:

http://www.debenu.com/docs/pdf_library_reference/ExtractFilePages.php

...or ExtractFilePageEx?

Here you'll find alternatives easier to use:

http://www.debenu.com/docs/pdf_library_reference/PageManipulation.php

-------------
Cheers,
Ingo

Posted By: Mimouni
Date Posted: 11 May 16 at 7:57AM

@Ingo: i don't use ExtractFilePages or ExtractFilePageEx because i each iteration i must extract one page and not a range of pages

Anyway, i have used ExtractFilePages method and i've had the some bihavior

Posted By: Mimouni
Date Posted: 11 May 16 at 8:30AM

the fact of re-selecting the document inside the loop, resolve the problem but remains to be seen the memory consumption