如何使用itextsharp pdf添加页脚(带变量/class)

Question

我有这段代码，我想添加一个表作为页脚。但问题是我无法传递变量：

Document doc = new Document();
doc.AddTitle("e-8D Report_" + report.OSIE8DNO + ".pdf");
PdfWriter writer = PdfWriter.GetInstance(doc, fs);
doc.SetPageSize(PageSize.A4);
doc.SetMargins(18f, 18f, 18f, 18f); // 0.25 inch margins
doc.Open();
PdfPTable table = new PdfPTable(10)
{
WidthPercentage = 100,
LockedWidth = true,
TotalWidth = 560f
};
float[] widths = new float[] { 32f, 73f, 70f, 70f, 70f, 70f, 70f, 70f, 73f, 32f };
table.SetWidths(widths);
// rest of the document
// ...
// rest of the document
// Below is the part that I want to add as footer
#region Footer
// left margin
cell = new PdfPCell(new Phrase(" ", font6))
{
Border = Rectangle.NO_BORDER
};
table.AddCell(cell);
cell = new PdfPCell(new Phrase("Reviewed & Approved by :", font6))
{
Colspan = 4,
BackgroundColor = bgBlue,
HorizontalAlignment = Element.ALIGN_LEFT,
Border = Rectangle.TOP_BORDER | Rectangle.LEFT_BORDER
};
table.AddCell(cell);
cell = new PdfPCell(new Phrase("For document approval by email, no Manual / e-Signature required &", font2))
{
Colspan = 4,
BackgroundColor = bgBlue,
HorizontalAlignment = Element.ALIGN_LEFT,
Border = Rectangle.TOP_BORDER | Rectangle.RIGHT_BORDER
};
table.AddCell(cell);
// right margin
cell = new PdfPCell(new Phrase(" ", font6))
{
Border = Rectangle.NO_BORDER
};
table.AddCell(cell);
// the rest of the cell
//...
// the rest of the cell
#endregion
doc.Add(table);
//writer.PageEvent = new PDFFooter();
doc.Close();

有了这些变量，我就无法使用以下来源的PdfPageEventHelper制作页脚：带有iTextSharp 的pdf页脚

请帮助

Answer 1

已经得到了答案。我将参数添加到PdfPageEventHelper类：

public PdfPTable footer { get; set; }
public override void OnEndPage(PdfWriter writer, Document document)
{
base.OnEndPage(writer, document);
document.Add(footer);
}

并从页面调用(首先在页面上创建完整的表(：

writer.PageEvent = new PDFHeaderFooter() { footer = table };