如何使用iText 7将页眉和页脚添加到PDF [英] How to add Header and Footer to a PDF with iText 7
本文介绍了如何使用iText 7将页眉和页脚添加到PDF的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
使用iTextSharp,您可以通过将事件附加到PDF来向PDF添加页眉/页脚,如以下SO答案中所述: https://stackoverflow.com/a/19004392
With iTextSharp you could add header/footer to a PDF by attaching an event to the PDF like explained in this SO answer: https://stackoverflow.com/a/19004392
我如何使用iText 7做同样的事情?
How can I do the same thing with iText 7?
此链接具有Java代码示例,但似乎不使用页面事件.
This link has Java code example but does not seem like its using page events.
推荐答案
The iText 7 .Net sample TextFooter.cs illustrates how to automatically add headers and footers by means of events:
public class TextFooter
{
public static readonly String DEST = "results/sandbox/events/text_footer.pdf";
public static void Main(String[] args)
{
FileInfo file = new FileInfo(DEST);
file.Directory.Create();
new TextFooter().ManipulatePdf(DEST);
}
protected void ManipulatePdf(String dest)
{
PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest));
Document doc = new Document(pdfDoc);
pdfDoc.AddEventHandler(PdfDocumentEvent.END_PAGE, new TextFooterEventHandler(doc));
for (int i = 0; i < 3; i++)
{
doc.Add(new Paragraph("Test " + (i + 1)));
if (i != 2)
{
doc.Add(new AreaBreak());
}
}
doc.Close();
}
private class TextFooterEventHandler : IEventHandler
{
protected Document doc;
public TextFooterEventHandler(Document doc)
{
this.doc = doc;
}
public void HandleEvent(Event currentEvent)
{
PdfDocumentEvent docEvent = (PdfDocumentEvent) currentEvent;
Rectangle pageSize = docEvent.GetPage().GetPageSize();
PdfFont font = null;
try {
font = PdfFontFactory.CreateFont(StandardFonts.HELVETICA_OBLIQUE);
}
catch (IOException e)
{
Console.Error.WriteLine(e.Message);
}
float coordX = ((pageSize.GetLeft() + doc.GetLeftMargin())
+ (pageSize.GetRight() - doc.GetRightMargin())) / 2;
float headerY = pageSize.GetTop() - doc.GetTopMargin() + 10;
float footerY = doc.GetBottomMargin();
Canvas canvas = new Canvas(docEvent.GetPage(), pageSize);
canvas
.SetFont(font)
.SetFontSize(5)
.ShowTextAligned("this is a header", coordX, headerY, TextAlignment.CENTER)
.ShowTextAligned("this is a footer", coordX, footerY, TextAlignment.CENTER)
.Close();
}
}
}
这篇关于如何使用iText 7将页眉和页脚添加到PDF的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文