iTextSharp：无法在 PdfSmartCopy 编写器上附加 PageEvent

Question

此代码使用 ItextSharp 5.5.10：

 var msOutput = new MemoryStream();
 var document = new Document(PageSize.A4, 0, 0, 0, 20);
 var writer = new PdfSmartCopy(document, msOutput);
 writer.PageEvent = new MyHeaderFooterEvents();

在分配 "writer.PageEvent" 时抛出 "Operation is not valid due to the current state of the object."（在执行无参数的 new Document() 时也会失败）。

当此代码完美运行时：

 var outputStream = new MemoryStream();
 var document = new Document(PageSize.A4, leftMargin, rightMargin, topMargin, bottomMargin);
 var writer = PdfWriter.GetInstance(document, outputStream);
 writer.PageEvent = new MyHeaderFooterEvents();

有什么想法吗？

Answer 1

Pdf[Smart]Copy 类用于 read-only 用法。它记录在原始源代码中：

/// Setting page events isn't possible with Pdf(Smart)Copy.
/// Use the PageStamp class if you want to add content to copied pages.

iText 开发团队注意事项 - 如果 XML Documentation Comments using the <summary> tag are used instead of the current style, comments will show up in Visual Studio IntelliSense。

iTextSharp：无法在 PdfSmartCopy 编写器上附加 PageEvent

iTextSharp : Cannot attach PageEvent on a PdfSmartCopy writer

events

itext

pdf-writer