This is my first question on stackoverflow.
I hope to be welcome.
My question.
I trying to use iTextSharp for create PDF file with header, footer, number of pages and logo.
My code below and my problem is error on this line of my code behind:
pdfDoc.Close();
If I disable this line the PDF file is created but damaged it cannot be opened.
The error is :
Object reference not set to an instance of an object
I really hope in your help.
Create a PDF file:
using (StringWriter sw = new StringWriter())
{
using (HtmlTextWriter hw = new HtmlTextWriter(sw))
{
pdffile.RenderControl(hw);
StringReader sr = new StringReader(sw.ToString());
string imagepath = Server.MapPath("..") + "\\Logo.jpg";
Document pdfDoc = new Document(PageSize.A4, 20f, 20f, 10f, 20f);
using (MemoryStream memoryStream = new MemoryStream())
{
try
{
PdfWriter writer = PdfWriter.GetInstance(pdfDoc, memoryStream);
pdfDoc.Open();
writer.PageEvent = new Footer();
BaseFont bfTimes = BaseFont.CreateFont(BaseFont.TIMES_ROMAN, BaseFont.CP1252, false);
iTextSharp.text.Font times = new iTextSharp.text.Font(bfTimes, 12, iTextSharp.text.Font.ITALIC, iTextSharp.text.BaseColor.MAGENTA);
iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(imagepath);
pdfDoc.Add(image);
var cssResolver = new StyleAttrCSSResolver();
var cssFile = XMLWorkerHelper.GetCSS(new FileStream(HttpContext.Current.Server.MapPath("style.css"), FileMode.Open));
cssResolver.AddCss(cssFile);
// HTML
HtmlPipelineContext htmlContext = new HtmlPipelineContext(null);
htmlContext.SetTagFactory(Tags.GetHtmlTagProcessorFactory());
// Pipelines
PdfWriterPipeline pdfFile = new PdfWriterPipeline(pdfDoc, writer);
HtmlPipeline html = new HtmlPipeline(htmlContext, pdfFile);
CssResolverPipeline css = new CssResolverPipeline(cssResolver, html);
// XML Worker
XMLWorker worker = new XMLWorker(css, true);
XMLParser p = new XMLParser(worker);
p.Parse(sr);
pdfDoc.Close();
byte[] bytes = memoryStream.ToArray();
memoryStream.Close();
}
catch (Exception ex)
{
throw (ex);
}
}
}
}
Add header/footer to PDF
public partial class Footer : PdfPageEventHelper
{
PdfContentByte cb;
PdfTemplate headerTemplate, footerTemplate;
BaseFont bf = null;
DateTime PrintTime = DateTime.Now;
iTextSharp.text.Image image;
private string _header;
public string Header
{
get { return _header; }
set { _header = value; }
}
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;
headerTemplate = cb.CreateTemplate(100, 100);
footerTemplate = cb.CreateTemplate(50, 50);
}
catch (DocumentException de)
{
//handle exception here
}
catch (System.IO.IOException ioe)
{
//handle exception here
}
}
public override void OnEndPage(iTextSharp.text.pdf.PdfWriter writer,
iTextSharp.text.Document document)
{
base.OnEndPage(writer, document);
iTextSharp.text.Font baseFontNormal =
new iTextSharp.text.Font(iTextSharp.text.Font.FontFamily.HELVETICA, 12f,
iTextSharp.text.Font.NORMAL, iTextSharp.text.BaseColor.BLACK);
iTextSharp.text.Font baseFontBig =
new iTextSharp.text.Font(iTextSharp.text.Font.FontFamily.HELVETICA, 12f,
iTextSharp.text.Font.BOLD, iTextSharp.text.BaseColor.BLACK);
Phrase p1Header = new Phrase("testing", baseFontNormal);
PdfPTable pdfTab = new PdfPTable(3);
PdfPCell pdfCell1 = new PdfPCell();
PdfPCell pdfCell2 = new PdfPCell(p1Header);
PdfPCell pdfCell3 = new PdfPCell();
String text = "Page " + writer.PageNumber + " of ";
{
cb.BeginText();
cb.SetFontAndSize(bf, 12);
cb.SetTextMatrix(document.PageSize.GetRight(200), document.PageSize.GetTop(45));
cb.ShowText(text);
cb.EndText();
float len = bf.GetWidthPoint(text, 12);
cb.AddTemplate(headerTemplate, document.PageSize.GetRight(200) + len, document.PageSize.GetTop(45));
}
{
cb.BeginText();
cb.SetFontAndSize(bf, 12);
cb.SetTextMatrix(document.PageSize.GetRight(180), document.PageSize.GetBottom(30));
cb.ShowText(text);
cb.EndText();
float len = bf.GetWidthPoint(text, 12);
cb.AddTemplate(footerTemplate, document.PageSize.GetRight(180) + len, document.PageSize.GetBottom(30));
Paragraph footer =
new Paragraph("©All Rights Reserved",
FontFactory.GetFont(FontFactory.HELVETICA, 8, iTextSharp.text.Font.ITALIC));
footer.Alignment = Element.ALIGN_RIGHT;
PdfPTable footerTbl = new PdfPTable(1);
footerTbl.TotalWidth = 800;
footerTbl.HorizontalAlignment = Element.ALIGN_CENTER;
PdfPCell cell = new PdfPCell(footer);
cell.Border = 0;
cell.PaddingLeft = 10;
footerTbl.AddCell(cell);
footerTbl.WriteSelectedRows(0, -1, 0, 30, writer.DirectContent);
}
PdfPCell pdfCell4 = new PdfPCell(new Phrase("test", baseFontNormal));
PdfPCell pdfCell5 = new PdfPCell(new Phrase("Date:" + PrintTime.ToShortDateString(), baseFontBig));
PdfPCell pdfCell6 = new PdfPCell();
PdfPCell pdfCell7 = new PdfPCell(new Phrase("Hour:" + string.Format("{0:t}", DateTime.Now), baseFontBig));
pdfCell1.HorizontalAlignment = Element.ALIGN_CENTER;
pdfCell2.HorizontalAlignment = Element.ALIGN_CENTER;
pdfCell3.HorizontalAlignment = Element.ALIGN_CENTER;
pdfCell4.HorizontalAlignment = Element.ALIGN_CENTER;
pdfCell5.HorizontalAlignment = Element.ALIGN_CENTER;
pdfCell6.HorizontalAlignment = Element.ALIGN_CENTER;
pdfCell7.HorizontalAlignment = Element.ALIGN_CENTER;
pdfCell2.VerticalAlignment = Element.ALIGN_BOTTOM;
pdfCell3.VerticalAlignment = Element.ALIGN_MIDDLE;
pdfCell4.VerticalAlignment = Element.ALIGN_TOP;
pdfCell5.VerticalAlignment = Element.ALIGN_MIDDLE;
pdfCell6.VerticalAlignment = Element.ALIGN_MIDDLE;
pdfCell7.VerticalAlignment = Element.ALIGN_MIDDLE;
pdfCell4.Colspan = 3;
pdfCell1.Border = 0;
pdfCell2.Border = 0;
pdfCell3.Border = 0;
pdfCell4.Border = 0;
pdfCell5.Border = 0;
pdfCell6.Border = 0;
pdfCell7.Border = 0;
pdfTab.AddCell(pdfCell1);
pdfTab.AddCell(pdfCell2);
pdfTab.AddCell(pdfCell3);
pdfTab.AddCell(pdfCell4);
pdfTab.AddCell(pdfCell5);
pdfTab.AddCell(pdfCell6);
pdfTab.AddCell(pdfCell7);
pdfTab.TotalWidth = document.PageSize.Width - 80f;
pdfTab.WidthPercentage = 70;
pdfTab.WriteSelectedRows(0, -1, 40, document.PageSize.Height - 30, writer.DirectContent);
cb.MoveTo(40, document.PageSize.Height - 100);
cb.LineTo(document.PageSize.Width - 40, document.PageSize.Height - 100);
cb.Stroke();
cb.MoveTo(40, document.PageSize.GetBottom(50));
cb.LineTo(document.PageSize.Width - 40, document.PageSize.GetBottom(50));
cb.Stroke();
}
public override void OnCloseDocument(PdfWriter writer, Document document)
{
base.OnCloseDocument(writer, document);
headerTemplate.BeginText();
headerTemplate.SetFontAndSize(bf, 12);
headerTemplate.SetTextMatrix(0, 0);
headerTemplate.ShowText((writer.PageNumber - 1).ToString());
headerTemplate.EndText();
footerTemplate.BeginText();
footerTemplate.SetFontAndSize(bf, 12);
footerTemplate.SetTextMatrix(0, 0);
footerTemplate.ShowText((writer.PageNumber - 1).ToString());
footerTemplate.EndText();
}
}
