Itextsharp

Question

: Probable I/O race condition detected while copying memory. The I/O package is not thread safe by default. In multithreaded applications, a stream must be accessed in a thread-safe way, such as a thread-safe wrapper returned by TextReader's or TextWriter's Synchronized methods. This also applies to classes like StreamWriter and StreamReader.

在线阅读，看起来 iText PDF sharp 是线程安全的（但也许我错了！）。

当运行在并行 for 循环中输入文本时，我得到上述异常。

 iTextSharp.text.pdf.PdfReader pdfReader = new iTextSharp.text.pdf.PdfReader(path);

        StringBuilder text = new StringBuilder();

        Parallel.For(1, pdfReader.NumberOfPages + 1, page =>
            {
                ITextExtractionStrategy strategy = new SimpleTextExtractionStrategy();

                string currentText = PdfTextExtractor.GetTextFromPage(pdfReader, page, strategy);

                text.Add(currentText);
            }
        );
        pdfReader.Close();

Answer 1

只有一个线程可以同时访问同一个文档。 iText(Sharp) 是线程安全的，因为多个线程可以同时创建和操作不同个文档。

Itextsharp - 多线程问题

Itext Sharp - multithreading issues

c#

itext