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PDFSharp open existing document has no pages
https://forum.pdfsharp.net/viewtopic.php?f=2&t=3180		 Page 1 of 1
Author:  pwl2706 [ Tue Aug 25, 2015 1:54 pm ]
Post subject:  PDFSharp open existing document has no pages
Hi,

I am new to PDFSharp.

I have a PDF document consisting of a table with some data saved on my hard drive by my c# service. The size of the table is actually meant to print on a compliments slip sized page, so about 1/3 of an A4 page.

I need to rotate the table by 90" then save it back, as the paper for these cashier receipts needs to be fed long-wise into the printer using the manual feed tray.

So I tried the below code to open an existing document:
Code:
               // Rotate and save the PDF;
                PdfDocument doc = new PdfDocument(reportName); ;
                var page = doc.Pages[0];
                page.Rotate = 90;

                //Save pdf file.
                doc.Save("PDFSharp _" + reportName);
                doc.Close();


Before I run the above code, the document referenced by reportName is 25KB...after that line of code executes, the document is 0 bytes in size.

So obviously I am creating a new document and overwriting my existing one.

What is the correct method call to open an existing single page PDF, rotate it's single page, and save it?

Thanks
Author:  Thomas Hoevel [ Tue Aug 25, 2015 2:05 pm ]
Post subject:  Re: PDFSharp open existing document has no pages
Hi!

There are many samples that modify (Watermark) or import (Two Pages on One, Combine Documents) PDF pages.
Please check those samples to get started:
http://www.pdfsharp.net/wiki/PDFsharpSamples.ashx

Specifying a filename with "new PdfDocument(reportName)" allows to later call "Save()" without filename. It does not pretend to import the file.
Author:  pwl2706 [ Tue Aug 25, 2015 2:08 pm ]
Post subject:  Re: PDFSharp open existing document has no pages
Thanks Thomas, I will take a look.

In fact I managed to do it by the below:
Code:
                // Rotate and save the PDF;
                PdfDocument doc= PdfReader.Open(reportName);
                var page = doc.Pages[0];
                page.Rotate = 90;

                //Save pdf file.
                doc.Save("PDFSharp _" + reportName);
                doc.Close();
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