PdfPTable作为iTextSharp中的标题

Question

我需要一个包含大约12个单元格的表格作为标题显示.以下代码无法执行此操作.我知道table2没有12个单元格.在第二页上,仅显示"测试".我错过了什么？

提前致谢!

Document document = new Document();

        try
        {
            PdfWriter.GetInstance(document, new FileStream("TableTest.pdf", FileMode.Create));
            document.Open();

            PdfPTable table = new PdfPTable(1);
            table.WidthPercentage = 100;
            PdfPTable table2 = new PdfPTable(2);

            //logo
            PdfPCell cell2 = new PdfPCell(Image.GetInstance(@"C:\path\to\file.gif"));
            cell2.Colspan = 2;
            table2.AddCell(cell2);

            //title
            cell2 = new PdfPCell(new Phrase("\nTITLE TEXT", new Font(Font.HELVETICA, 16, Font.BOLD | Font.UNDERLINE)));
            cell2.HorizontalAlignment = Element.ALIGN_CENTER;
            cell2.Colspan = 2;
            table2.AddCell(cell2);

            PdfPCell cell = new PdfPCell(table2);
            table.HeaderRows = 1;
            table.AddCell(cell);
            table.AddCell(new PdfPCell(new Phrase("")));

            document.Add(table);

            document.Add(new Phrase("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\ntesting"));
        }
        catch (DocumentException de)
        {
            Console.Error.WriteLine(de.Message);
        }
        catch (IOException ioe)
        {
            Console.Error.WriteLine(ioe.Message);
        }

        document.Close();

Answer 1

答对了!PdfPageEventHandler类为我工作.

我使用PdfPageEventHelper重写OnEndPage方法:

class _events : PdfPageEventHelper
{
    public override void OnEndPage(PdfWriter writer, Document document)
    {
        PdfPTable table = new PdfPTable(1);
        //table.WidthPercentage = 100; //PdfPTable.writeselectedrows below didn't like this
        table.TotalWidth = document.PageSize.Width - document.LeftMargin - document.RightMargin; //this centers [table]
        PdfPTable table2 = new PdfPTable(2);

        //logo
        PdfPCell cell2 = new PdfPCell(Image.GetInstance(@"C:\path\to\file.gif"));
        cell2.Colspan = 2;
        table2.AddCell(cell2);

        //title
        cell2 = new PdfPCell(new Phrase("\nTITLE", new Font(Font.HELVETICA, 16, Font.BOLD | Font.UNDERLINE)));
        cell2.HorizontalAlignment = Element.ALIGN_CENTER;
        cell2.Colspan = 2;
        table2.AddCell(cell2);

        PdfPCell cell = new PdfPCell(table2);
        table.AddCell(cell);

        table.WriteSelectedRows(0, -1, document.LeftMargin, document.PageSize.Height - 36, writer.DirectContent);
    }
}

然后,建立pdf

Document document = new Document(PageSize.A4, 36, 36, 36 + <height of table>, 36); // note height should be set here
_events e = new _events();
PdfWriter pw = PdfWriter.GetInstance(document, new FileStream("TableTest.pdf", FileMode.Create));
pw.PageEvent = e;
document.Open();

for(int i=0;i<100;i++)
{
    document.Add(new Phrase("TESTING\n"));
}

document.Close();