Question

我正在使用iTextSharp生成一个大文档。在本文档中，我想要一些特定的页面。其余的都是肖像。有谁知道我怎么做到这一点？不能选择开始新文档。

谢谢！

Answer 1

您可以设置文档大小，它会影响下一页。一些片段：

在某处设置您的文档（您已经知道）：

  var document = new Document();
  PdfWriter pdfWriter = PdfWriter.GetInstance(
    document, new FileStream(destinationFile, FileMode.Create)
  );
  pdfWriter.SetFullCompression();
  pdfWriter.StrictImageSequence = true;
  pdfWriter.SetLinearPageMode();

现在循环遍历您的页面（您可能已经这样做了）并确定每页所需的页面大小：

 for (int pageIndex = 1; pageIndex <= pageCount; pageIndex++) {
    // Define the page size here, _before_ you start the page.
    // You can easily switch from landscape to portrait to whatever
    document.SetPageSize(new Rectangle(600, 800));          

    if (document.IsOpen()) {
      document.NewPage();
    } else {
      document.Open();
    }
  }

Answer 2

试试这个代码：

using System;
using System.IO;
using iText.Kernel.Events;
using iText.Kernel.Pdf;
using iText.Layout;
using iText.Layout.Element;

namespace iText.Samples.Sandbox.Events
{
    public class PageOrientations
    {
        public static readonly String DEST = "results/sandbox/events/page_orientations.pdf";
    public static readonly PdfNumber PORTRAIT = new PdfNumber(0);
    public static readonly PdfNumber LANDSCAPE = new PdfNumber(90);
    public static readonly PdfNumber INVERTEDPORTRAIT = new PdfNumber(180);
    public static readonly PdfNumber SEASCAPE = new PdfNumber(270);

    public static void Main(String[] args)
    {
        FileInfo file = new FileInfo(DEST);
        file.Directory.Create();

        new PageOrientations().ManipulatePdf(DEST);
    }

    protected void ManipulatePdf(String dest)
    {
        PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest));

        // The default page orientation is set to portrait in the custom event handler.
        PageOrientationsEventHandler eventHandler = new PageOrientationsEventHandler();
        pdfDoc.AddEventHandler(PdfDocumentEvent.START_PAGE, eventHandler);
        Document doc = new Document(pdfDoc);

        doc.Add(new Paragraph("A simple page in portrait orientation"));

        eventHandler.SetOrientation(LANDSCAPE);
        doc.Add(new AreaBreak());
        doc.Add(new Paragraph("A simple page in landscape orientation"));

        eventHandler.SetOrientation(INVERTEDPORTRAIT);
        doc.Add(new AreaBreak());
        doc.Add(new Paragraph("A simple page in inverted portrait orientation"));

        eventHandler.SetOrientation(SEASCAPE);
        doc.Add(new AreaBreak());
        doc.Add(new Paragraph("A simple page in seascape orientation"));

        doc.Close();
    }

    private class PageOrientationsEventHandler : IEventHandler
    {
        private PdfNumber orientation = PORTRAIT;

        public void SetOrientation(PdfNumber orientation)
        {
            this.orientation = orientation;
        }

        public void HandleEvent(Event currentEvent)
        {
            PdfDocumentEvent docEvent = (PdfDocumentEvent) currentEvent;
            docEvent.GetPage().Put(PdfName.Rotate, orientation);
        }
    }
}

}

iTextSharp：横向表格

2 个答案: