iTextSharp:“文档未打开"；错误-实际上是 [英] iTextSharp: "The document is not open" error - when it actually is

问题描述

我有此代码:

    private static byte[] ConvertPdfDocument(Document document, PdfPTable headerTable, PdfPTable affidavitsTable)
    {
        byte[] b;
        using (MemoryStream ms = new MemoryStream())
        {
            PdfWriter writer = PdfWriter.GetInstance(document, ms);

            if (document.IsOpen() == false)
            {
                document.Open();
            }

            document.Add(headerTable);
            document.Add(affidavitsTable);
            document.Close();
            writer.Close();
            b = ms.ToArray();
        }

        return b;
    }

打开文档"对象(在此方法之外使用document.Open()，然后传入.

The "document" object is opened (using document.Open() outside of this method then passed in.

条件document.IsOpen()的值为True.通过查看调试器中"document"对象的私有属性，我进一步确认了该文档实际上是打开的.它表明打开"为真".

The condition document.IsOpen() evaluates to True. I've further confirmed the document is actually open by looking at the private properties of the "document" object in the debugger; it shows that "Open" is "true".

因此，执行继续到document.Add(headerTable)行.

Accordingly, execution moves on to the document.Add(headerTable) line.

此时，将引发异常:文档未打开." 在调试器停止运行(由于引发该异常)的同时，使用上述两种相同的方式，我仍然看到文档已打开.

And at that point an exception is thrown: "The document is not open." And while the debugger is stopped (due to that exception being thrown), using the same two ways described above, I can still see the document is open.

那怎么可能?

我已经谷歌搜索了一段时间，但找不到任何东西，除了发布的同一问题

I've been Googling for a while but can't find anything, other than the same question posted here with no answer...

任何帮助将不胜感激.

非常感谢， 埃里泽(Eliezer)

Thanks much, Eliezer

推荐答案

在PdfWriter.GetInstance()中使用该文档后必须将其打开，否则没有关联的编写器，并且它什么也不做.

The document must be opened after being used in PdfWriter.GetInstance() otherwise there no writer associated and it does nothing.

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