J'essaie de créer un pied de page sur chacune des pages dans un document PDF utilisant iTextSharp au format Page # of # en suivant le tutoriel sur les pages iText et le livre. Bien que je continue à une exception sur cb.SetFontAndSize (helv, 12); - référence d'objet non définie sur un objet. Quelqu'un peut-il voir le problème? Le code est ci-dessous.
Merci, Rob
public class MyPdfPageEventHelpPageNo : iTextSharp.text.pdf.PdfPageEventHelper
{
protected PdfTemplate total;
protected BaseFont helv;
private bool settingFont = false;
public override void OnOpenDocument(PdfWriter writer, Document document)
{
total = writer.DirectContent.CreateTemplate(100, 100);
total.BoundingBox = new Rectangle(-20, -20, 100, 100);
helv = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
}
public override void OnEndPage(PdfWriter writer, Document document)
{
PdfContentByte cb = writer.DirectContent;
cb.SaveState();
string text = "Page " + writer.PageNumber + " of ";
float textBase = document.Bottom - 20;
float textSize = 12; //helv.GetWidthPoint(text, 12);
cb.BeginText();
cb.SetFontAndSize(helv, 12);
if ((writer.PageNumber % 2) == 1)
{
cb.SetTextMatrix(document.Left, textBase);
cb.ShowText(text);
cb.EndText();
cb.AddTemplate(total, document.Left + textSize, textBase);
}
else
{
float adjust = helv.GetWidthPoint("0", 12);
cb.SetTextMatrix(document.Right - textSize - adjust, textBase);
cb.ShowText(text);
cb.EndText();
cb.AddTemplate(total, document.Right - adjust, textBase);
}
cb.RestoreState();
}
public override void OnCloseDocument(PdfWriter writer, Document document)
{
total.BeginText();
total.SetFontAndSize(helv, 12);
total.SetTextMatrix(0, 0);
int pageNumber = writer.PageNumber - 1;
total.ShowText(Convert.ToString(pageNumber));
total.EndText();
}
}
Voici un bon exemple pour ajouter le nombre total de pages à chaque page.
[~ # ~] modifier [~ # ~] : Voici le code de ce site au cas où il disparaîtrait:
using System;
using System.Collections.Generic;
using System.Text;
using iTextSharp.text.pdf;
using iTextSharp.text;
namespace PDF_Tests
{
public class TwoColumnHeaderFooter :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 OnStartPage(PdfWriter writer, Document document)
{
base.OnStartPage(writer, document);
Rectangle pageSize = document.PageSize;
if (Title != string.Empty)
{
cb.BeginText();
cb.SetFontAndSize(bf, 15);
cb.SetRGBColorFill(50, 50, 200);
cb.SetTextMatrix(pageSize.GetLeft(40), pageSize.GetTop(40));
cb.ShowText(Title);
cb.EndText();
}
if (HeaderLeft + HeaderRight != string.Empty)
{
PdfPTable HeaderTable = new PdfPTable(2);
HeaderTable.DefaultCell.VerticalAlignment = Element.ALIGN_MIDDLE;
HeaderTable.TotalWidth = pageSize.Width - 80;
HeaderTable.SetWidthPercentage(new float[] { 45, 45 }, pageSize);
PdfPCell HeaderLeftCell = new PdfPCell(new Phrase(8, HeaderLeft, HeaderFont));
HeaderLeftCell.Padding = 5;
HeaderLeftCell.PaddingBottom = 8;
HeaderLeftCell.BorderWidthRight = 0;
HeaderTable.AddCell(HeaderLeftCell);
PdfPCell HeaderRightCell = new PdfPCell(new Phrase(8, HeaderRight, HeaderFont));
HeaderRightCell.HorizontalAlignment = PdfPCell.ALIGN_RIGHT;
HeaderRightCell.Padding = 5;
HeaderRightCell.PaddingBottom = 8;
HeaderRightCell.BorderWidthLeft = 0;
HeaderTable.AddCell(HeaderRightCell);
cb.SetRGBColorFill(0, 0, 0);
HeaderTable.WriteSelectedRows(0, -1, pageSize.GetLeft(40), pageSize.GetTop(50), cb);
}
}
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.GetLeft(40), pageSize.GetBottom(30));
cb.ShowText(text);
cb.EndText();
cb.AddTemplate(template, pageSize.GetLeft(40) + len, pageSize.GetBottom(30));
cb.BeginText();
cb.SetFontAndSize(bf, 8);
cb.ShowTextAligned(PdfContentByte.ALIGN_RIGHT,
"Printed On " + PrintTime.ToString(),
pageSize.GetRight(40),
pageSize.GetBottom(30), 0);
cb.EndText();
}
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();
}
}
}
Et le code applicable pour le joindre:
// Our custom Header and Footer is done using Event Handler
TwoColumnHeaderFooter PageEventHandler = new TwoColumnHeaderFooter();
PDFWriter.PageEvent = PageEventHandler;
// Define the page header
PageEventHandler.Title = Title;
PageEventHandler.HeaderFont = FontFactory.GetFont(BaseFont.COURIER_BOLD, 10, Font.BOLD);
PageEventHandler.HeaderLeft = "Group";
PageEventHandler.HeaderRight = "1";
Le code ci-dessus est correct, le seul problème est qu'il n'est pas exécuté. Pour cela, vous devez créer une instance à l'endroit où vous avez écrit un code pour le téléchargement de PDf. Exemple:
MyPdfPageEventHelpPageNo pageeventhandler = new MyPdfPageEventHelpPageNo();
writer.PageEvent = pageeventhandler;
écrivain signifie PDF écrivain (une instance).
Dans chaque méthode que vous remplacez, vous pouvez ajouter un appel à sa méthode de base:
base.OnStartPage(writer, document);
base.OnEndPage(writer, document);
base.OnCloseDocument(writer, document);