Question

I have a pdf sharp document which I’m generating and saving it to a single file works well. If I try and save to several files from the same pdf document I get the following error message:

Test Error : UnitTests.PdfFocusCalResultOutputterTester.Test_MakePDF
System.InvalidOperationException : The dictionary already has a stream.
at PdfSharp.Pdf.PdfDictionary.CreateStream(Byte[] value)
at PdfSharp.Pdf.Advanced.PdfToUnicodeMap.PrepareForSave()
at PdfSharp.Pdf.Advanced.PdfType0Font.PrepareForSave()
at PdfSharp.Pdf.Advanced.PdfFontTable.PrepareForSave()
at PdfSharp.Pdf.PdfDocument.PrepareForSave()
at PdfSharp.Pdf.PdfDocument.DoSave(PdfWriter writer)
at PdfSharp.Pdf.PdfDocument.Save(Stream stream, Boolean closeStream)
at ResultOutputter.PdfFocusCalResultOutputter.RenderToFile(String filename) in c:\projects\testing\pdffocuscalresultoutputter.cpp:line 802

I’m simply calling PdfSharp::Pdf::PdfDocument::Save on my instance of a PdfDocument as follows:

System::IO::FileStream^ s = gcnew System::IO::FileStream("firstpdf.pdf", System::IO::FileMode::Create);
m_document->Save(s, false);
s->Flush();
s->Close();

System::IO::FileStream^ s2 = gcnew System::IO::FileStream("secondpdf.pdf", System::IO::FileMode::Create);
m_document->Save(s2, false);
s2->Flush();
s2->Close();

Answer 1

1. It’s a bug in PDFsharp, your code should work.
2. Your code is not efficient. Save once to a stream, then write that stream into two or more files.