来自It.Document的Itextsharp PdfDocument或PdfDocument

时间:2012-06-05 18:36:26

标签: pdf itextsharp page-numbering

我使用ITextSharp将页码添加到pdf文档的底部 问题是,它由4或5个不同的PDF组成,这些PDF通过整个过程组合在一起,并且有一些动态添加的页面,因此PDF的大小可能会有所不同。我无法调用document.PageCount,因为它“缺少get访问器”。

我做了一个计数器来跟踪我所在的页面,并且可以在最后一页上说“第9页,共9页”,但其余的只是说“第7页”。 我想我可以通过PdfReader运行整个文件来调用reader.NumberOfPages并重新运行每个页面并在底部添加最终的数字,但我不知道如何从iTextSharp.text.Document类型中创建一个,也不知道如何事后再去做。

这是一个由其他人创建的项目,之前我几乎没有触及过iTextSharp,我无法重新上课,因为它太大了。

有谁知道我能做什么?或者如何将这1个数字添加到iTextSharp.text.Document的每个页面?

1 个答案:

答案 0 :(得分:0)

发现它们:D

所以每当你创作作家时:

using (MemoryStream MS = new MemoryStream())
        {
            PdfWriter writer = PdfWriter.GetInstance(doc, MS);
            writer.ViewerPreferences = PdfWriter.PageModeUseOutlines;
            PdfFooter eventHandler = new PdfFooter();
            writer.PageEvent = eventHandler;

ect.
}

对于PdfFooter:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using iTextSharp.text.pdf;
using iTextSharp.text;

public class PdfFooter : PdfPageEventHelper
{
    // This is the contentbyte object of the writer
    PdfContentByte cb;

// we will put the final number of pages in a template
PdfTemplate template;

// this is the BaseFont we are going to use for the header / footer
BaseFont bf = null;

// This keeps track of the creation time
DateTime PrintTime = DateTime.Now;

#region Properties
private string _Title;
public string Title
{
    get { return _Title; }
    set { _Title = value; }
}

private string _HeaderLeft;
public string HeaderLeft
{
    get { return _HeaderLeft; }
    set { _HeaderLeft = value; }
}

private string _HeaderRight;
public string HeaderRight
{
    get { return _HeaderRight; }
    set { _HeaderRight = value; }
}

private Font _HeaderFont;
public Font HeaderFont
{
    get { return _HeaderFont; }
    set { _HeaderFont = value; }
}

private Font _FooterFont;
public Font FooterFont
{
    get { return _FooterFont; }
    set { _FooterFont = value; }
}
#endregion

// we override the onOpenDocument method
public override void OnOpenDocument(PdfWriter writer, Document document)
{
    try
    {
        PrintTime = DateTime.Now;
        bf = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
        cb = writer.DirectContent;
        template = cb.CreateTemplate(50, 50);
    }
    catch (DocumentException de)
    {
    }
    catch (System.IO.IOException ioe)
    {
    }
}

public override void OnEndPage(PdfWriter writer, Document document)
{
    base.OnEndPage(writer, document);

    int pageN = writer.PageNumber;
    String text = "Page " + pageN + " of ";
    float len = bf.GetWidthPoint(text, 8);

    Rectangle pageSize = document.PageSize;

    cb.SetRGBColorFill(100, 100, 100);

    cb.BeginText();
    cb.SetFontAndSize(bf, 8);
    cb.SetTextMatrix(pageSize.GetRight(70), pageSize.GetBottom(15));
    cb.ShowText(text);
    cb.EndText();

    cb.AddTemplate(template, pageSize.GetRight(70) + len, pageSize.GetBottom(15));
}

public override void OnCloseDocument(PdfWriter writer, Document document)
{
    base.OnCloseDocument(writer, document);

    template.BeginText();
    template.SetFontAndSize(bf, 8);
    template.SetTextMatrix(0, 0);
    template.ShowText("" + (writer.PageNumber - 1));
    template.EndText();
}

}

希望这可以帮助将来的某个人:)