.net - 如何将 PDFSharp 对象保存到多个文件？

Question

我有一个 pdf 清晰的文档，我正在生成并将其保存到单个文件中，效果很好。如果我尝试从同一个 pdf 文档保存到多个文件，我会收到以下错误消息:

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

我只是打电话 PdfSharp::Pdf::PdfDocument::Save在我的 PdfDocument 实例上如下:

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

这是 PDFsharp 中的一个错误，您的代码应该可以工作。

你的代码效率不高。保存一次到一个流，然后将该流写入两个或多个文件。