PDFsharp & MigraDoc Forum

Environment - PDFsharp Library, Visual Studio 2012 and C# as the language.

I am trying to:

1. read Test1.pdf (Width = 17 inches, Height – 11 inches) with 1 page
2. add some text to it
3. save it as another file (Test2.pdf)

I am able to do all the following. But when I open the file Test2.pdf the size of the page is getting reduced to Width = 11 inches, Height – 11 inches. These PDF files that I am using are Product Specification Sheets that I have downloaded from the internet. I believe this is happening on only certain types of file and I am not sure how to differentiate these files.

Code given below:
//File dimentions - Width = 17 inches, Height - 11 inches (Tabloid Format)
PdfDocument pdfDocument = PdfReader.Open(@"D:\Test1.pdf", PdfDocumentOpenMode.Modify);

PdfPage page = pdfDocument.Pages[0];
XGraphics gfx = XGraphics.FromPdfPage(page);
XFont font = new XFont("Verdana", 20, XFontStyle.BoldItalic);
gfx.DrawString("Hello, World!", font, XBrushes.Black, new XRect(0, 0, page.Width, page.Height), XStringFormats.Center);

//When the file is saved dimentions change to - Width = 11 inches, Height - 11 inches
pdfDocument.Save(@"D:\Test2.pdf");

PDF files come in many different "flavors".
Maybe the workaround described here will work for you:
viewtopic.php?p=2637#p2637

_________________
Regards
Thomas Hoevel
PDFsharp Team

Thomas, thank you for the reply. I restructured the code as suggested by you to the following:


When I run this code I get the exception - Cannot create XGraphics for a page of a document that cannot be modified. Use PdfDocumentOpenMode.Modify.

And when I change the code from
PdfDocument PDFDoc = PdfReader.Open(@"D:\Test1.pdf", PdfDocumentOpenMode.Import);
to
PdfDocument PDFDoc = PdfReader.Open(@"D:\Test1.pdf", PdfDocumentOpenMode.Modify);

I get the exception - A PDF document must be opened with PdfDocumentOpenMode.Import to import pages from it.

How exactly should I achieve this ?

Use the page returned by AddPage or the page from PDFNewDoc.Pages, not the page from PDFDoc.Pages.

See also:
http://stackoverflow.com/a/17649357/162529

_________________
Regards
Thomas Hoevel
PDFsharp Team

Thomas, thanks a lot !!!
This solved my problem.