Develop Reference

Parser results in "The document has no pages"

Trying to generate a PDF with HTML/CSS by using ITextSharp v5. The error I get is "Document has no pages". Is my parser set up wrong? How do I get the parsed HTML added to my document?
public void ConvertHtmlToPdf(string xHtml, string css)
{
using (var stream = new FileStream("App_Data/pdfs/testt.pdf", FileMode.Create))
{
using (var document = new Document(PageSize.A4, 10f, 10f, 10f, 0f))
{
var writer = PdfWriter.GetInstance(document, stream);
document.Open();
// instantiate custom tag processor and add to `HtmlPipelineContext`.
var tagProcessorFactory = Tags.GetHtmlTagProcessorFactory();
var htmlPipelineContext = new HtmlPipelineContext(null);
htmlPipelineContext.SetTagFactory(tagProcessorFactory);
var pdfWriterPipeline = new PdfWriterPipeline(document, writer);
var htmlPipeline = new HtmlPipeline(htmlPipelineContext, pdfWriterPipeline);
// get an ICssResolver and add the custom CSS
var cssResolver = XMLWorkerHelper.GetInstance().GetDefaultCssResolver(true);
cssResolver.AddCss(css, "utf-8", true);
var cssResolverPipeline = new CssResolverPipeline(
cssResolver, htmlPipeline
);
var worker = new XMLWorker(cssResolverPipeline, true);
var parser = new XMLParser(worker);
using (var stringReader = new StringReader(xHtml))
{
parser.Parse(stringReader);
}
document.Close();
writer.Close();
}
}
}

The document is empty as no data is written to it from Worker classes.
Immediately after opening the document, always add an empty chunk to document so that you can avoid this exception.
document.add(new Chunk(''));
To Convert HTML to PDF, you can check this example
How to convert HTML to PDF using iText

header and footer using itextsharp using c#

I am using itextsharp for pdf generation using .net web applications. I have installed the following version of itextsharp using nuget package Install-Package iTextSharp -Version 5.5.10. I have seen the samples and developed
code sample to generate the pdf and it is working. However i am not able to understand or get the header footer been added to the pdf. Here is the sample code i am using
public class Header : PdfPageEventHelper
{
protected Phrase header;
public void setHeader(Phrase header)
{
this.header = header;
}
public void onEndPage(PdfWriter writer, Document document)
{
PdfContentByte canvas = writer.DirectContent;
ColumnText.ShowTextAligned(canvas, Element.ALIGN_RIGHT, header, 559, 806, 0);
}
}
Document pdfReport = null;
MemoryStream msReport = new MemoryStream();
PdfWriter pdfWriter = PdfWriter.GetInstance(pdfReport, msReport);
if (!string.IsNullOrEmpty(HeaderText))
{
Header objHeaderFooter = new Header();
//Here i need to assign the string HeaderText to Header. I dont know how to do it.
}
Please help to know how to assign HeaderText using itextSharp. Most of the developers examples are on java
but i am using .net c#.

You want to assign HeaderText to objHeaderFooter in
if (!string.IsNullOrEmpty(HeaderText))
{
Header objHeaderFooter = new Header();
//Here i need to assign the string HeaderText to Header. I dont know how to do it.
}
Assuming HeaderText to be a string you can do so using the Header method setHeader:
objHeaderFooter.setHeader(new Phrase(HeaderText));
Furthermore, you have to assign objHeaderFooter to your PdfWriter instance:
pdfWriter.PageEvent = objHeaderFooter;
Thus:
if (!string.IsNullOrEmpty(HeaderText))
{
Header objHeaderFooter = new Header();
objHeaderFooter.setHeader(new Phrase(HeaderText));
pdfWriter.PageEvent = objHeaderFooter;
}
Furthermore, whenever you override a method in c#, mark it accordingly as override. In particular in your page event listener, use
public override void onEndPage(PdfWriter writer, Document document)
This is easy to forget, especially when porting java examples because in java the corresponding marker #Override is optional.
Below is the sample code provided by the op.
Response.Clear();
Response.Buffer = true;
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment; filename=abc.pdf");
Response.Charset = "";
Response.BinaryWrite(getbinary());
Response.End();
public byte[] getbinary()
{
Document pdfReport = null;
pdfReport = new Document(PageSize.A4, 25, 25, 40, 25);
MemoryStream msReport = new MemoryStream();
PdfWriter pdfWriter = PdfWriter.GetInstance(pdfReport, msReport);
pdfReport.Open();
if (!string.IsNullOrEmpty("Header Text"))
{
Header objHeaderFooter = new Header();
objHeaderFooter.SetHeader(new Phrase("Header Text"));
pdfWriter.PageEvent = objHeaderFooter;
}
PdfPTable ptData1 = new PdfPTable(1);
ptData1.SpacingBefore = 8;
ptData1.DefaultCell.Padding = 1;
ptData1.WidthPercentage = 100;
ptData1.DefaultCell.HorizontalAlignment = Element.ALIGN_CENTER;
ptData1.DefaultCell.VerticalAlignment = Element.ALIGN_MIDDLE;
PdfPCell cell1 = new PdfPCell();
cell1.BorderWidth = 0.001F;
cell1.BackgroundColor = new BaseColor(250, 250, 250);
cell1.BorderColor = new BaseColor(100, 100, 100);
cell1.Phrase = new Phrase("Sample text");
ptData1.AddCell(cell1);
PdfPCell cell = new PdfPCell();
cell.BorderWidth = 0.001F;
cell.BackgroundColor = new BaseColor(200, 200, 200);
cell.BorderColor = new BaseColor(100, 100, 100);
cell.Phrase = new Phrase("test value");
ptData1.AddCell(cell);
pdfReport.Add(ptData1);
pdfReport.Close();
return msReport.ToArray();
}
public class Header : PdfPageEventHelper
{
protected Phrase header;
public void SetHeader(Phrase header)
{
this.header = header;
}
public void onEndPage(PdfWriter writer, Document document)
{
PdfContentByte canvas = writer.DirectContent;
ColumnText.ShowTextAligned(canvas, Element.ALIGN_RIGHT, header, 559, 806, 0);
}
}

May be this could be used as a workaround. Added header as another cell value
Below is the code
if (!string.IsNullOrEmpty(HeaderText))
{
PdfPTable Header = new PdfPTable(1);
Header.SpacingBefore = 8;
Header.DefaultCell.Padding = 1;
Header.WidthPercentage = 100;
Header.DefaultCell.HorizontalAlignment = Element.ALIGN_CENTER;
Header.DefaultCell.VerticalAlignment = Element.ALIGN_MIDDLE;
PdfPCell cell1 = new PdfPCell();
cell1.BorderWidth = 0.001F;
cell1.BackgroundColor = new BaseColor(250, 250, 250);
cell1.BorderColor = new BaseColor(100, 100, 100);
cell1.Phrase = new Phrase(HeaderText, fontBold);
Header.AddCell(cell1);
pdfReport.Add(ptDataHeader);
}

Html to pdf Unicode chars not being displayed in pdfptable

I am writing a pdf file from html markup. In my code snippet the pdf is being successfully generated and the unicode characters are being also being rendered on the table.
Here is my code snippet:
void GeneratePdfFromHtml()
{
const string outputFilename = #"c:\report.pdf";
const string inputFilename = #"C:\report.html";
using (var input = new FileStream(inputFilename, FileMode.Open))
using (var output = new FileStream(outputFilename, FileMode.Create))
{
CreatePdf(input, output);
}
}
and this method creates pdf with unicode support:
void CreatePdf(Stream htmlInput, Stream pdfOutput)
{
using (var document = new Document(PageSize.A4, 30, 30, 30, 30))
{
var writer = PdfWriter.GetInstance(document, pdfOutput);
var worker = XMLWorkerHelper.GetInstance();
document.Open();
worker.ParseXHtml(writer, document, htmlInput, null, Encoding.Unicode, new UnicodeFontFactory());
document.Close();
}
}
This is a helper class to provide required fonts:
public class UnicodeFontFactory : FontFactoryImp
{
private static readonly string FontPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop),
"ARIALUNI.ttf");
private readonly BaseFont _baseFont;
public UnicodeFontFactory()
{
_baseFont = BaseFont.CreateFont(FontPath, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
}
public override iTextSharp.text.Font GetFont(string fontname, string encoding, bool embedded, float size, int style, BaseColor color,
bool cached)
{
return new iTextSharp.text.Font(_baseFont, size, style, color);
}
}
Problem this draws the resultant contents on Pdf document page but I want this to be drawn in a pdfptable cell.
What I have tried to achieve this:
void CreatePdf(string htmltext)
{
using (var document = new Document(PageSize.A4, 30, 30, 30, 30))
{
document.Open();
PdfPTable table = new PdfPTable(1);
PdfPCell cell = new PdfPCell();
List<IElement> elementsIzv = XMLWorkerHelper.ParseToElementList(htmltext, null);
foreach (IElement e in elementsIzv)
{
cell.AddElement(e);
}
table.AddCell(cell);
document.Add(table);
document.Close();
}
}
This snippet truncates the Special Characters. Please direct me in the right way, Any replacement to itextsharp is also acceptable.

iTextSharp set header in onendpage for just first page in document

How do you set the header to be on the first page of the document only.
As follows sets it on every page.
private class PDFAddHeaderTopOnly : PdfPageEventHelper
{
public PDFAddHeaderTopOnly(string html)
{
this.html = html;
}
public override void OnEndPage(PdfWriter writer, Document document)
{
base.OnEndPage(writer, document);
ColumnText ct = new ColumnText(writer.DirectContent);
XMLWorkerHelper.GetInstance().ParseXHtml(new ColumnTextElementHandler(ct), new StringReader(html));
ct.SetSimpleColumn(document.Left, document.Top, document.Right, document.GetTop(-PDFMarginTop), 0, Element.ALIGN_MIDDLE);
ct.Go();
}
string html = null;
}

In general
If you want to do something only on the first page, simply do it as the first action after opening the document and don't try to squeeze it into the page event framework which is designed for repetitive tasks.
In your case
Most likely you use your PDFAddHeaderTopOnly class like this:
string html = ...;
using (Document document = new Document()) {
PdfWriter writer = PdfWriter.GetInstance(document, stream);
writer.PageEvent = new PDFAddHeaderTopOnly(html);
document.Open();
[Add some content to document]
}
If you only want the header on the first page, do something like this instead:
using (Document document = new Document()) {
PdfWriter writer = PdfWriter.GetInstance(document, stream);
document.Open();
// Draw first-page-only header
ColumnText ct = new ColumnText(writer.DirectContent);
XMLWorkerHelper.GetInstance().ParseXHtml(new ColumnTextElementHandler(ct), new StringReader(html));
ct.SetSimpleColumn(document.Left, document.Top, document.Right, document.GetTop(-PDFMarginTop), 0, Element.ALIGN_MIDDLE);
ct.Go();
// Draw document content
[Add some content to document]
}

Creating a PDF file?

I looked into iTextSharp and SharpPDF and Report.Net as well as PDFSharp.
None of these open source projects have good documentation OR do not work with VS 2012.
Does anyone have a recommended solution or can show me the documentation?
My employer blocks many sites and although Google is not blocked, some of the results are.
I plan on using C# with WinForms and obtaining my data from an Access DB

Hey #Cocoa Dev get this a complete example with diferent functions.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using iTextSharp.text.pdf;
using System.Data;
using System.Text;
using System.util.collections;
using iTextSharp.text;
using System.Net.Mail;
public partial class PDFScenarios : System.Web.UI.Page
{
public string P_InputStream = "~/MyPDFTemplates/ex1.pdf";
public string P_InputStream2 = "~/MyPDFTemplates/ContactInfo.pdf";
public string P_InputStream3 = "~/MyPDFTemplates/MulPages.pdf";
public string P_InputStream4 = "~/MyPDFTemplates/CompanyLetterHead.pdf";
public string P_OutputStream = "~/MyPDFOutputs/ex1_1.pdf";
//Read all 'Form values/keys' from an existing multi-page PDF document
public void ReadPDFformDataPageWise()
{
PdfReader reader = new PdfReader(Server.MapPath(P_InputStream3));
AcroFields form = reader.AcroFields;
try
{
for (int page = 1; page <= reader.NumberOfPages; page++)
{
foreach (KeyValuePair<string, AcroFields.Item> kvp in form.Fields)
{
switch (form.GetFieldType(kvp.Key))
{
case AcroFields.FIELD_TYPE_CHECKBOX:
case AcroFields.FIELD_TYPE_COMBO:
case AcroFields.FIELD_TYPE_LIST:
case AcroFields.FIELD_TYPE_RADIOBUTTON:
case AcroFields.FIELD_TYPE_NONE:
case AcroFields.FIELD_TYPE_PUSHBUTTON:
case AcroFields.FIELD_TYPE_SIGNATURE:
case AcroFields.FIELD_TYPE_TEXT:
int fileType = form.GetFieldType(kvp.Key);
string fieldValue = form.GetField(kvp.Key);
string translatedFileName = form.GetTranslatedFieldName(kvp.Key);
break;
}
}
}
}
catch
{
}
finally
{
reader.Close();
}
}
//Read and alter form values for only second and
//third page of an existing multi page PDF doc.
//Save the changes in a brand new pdf file.
public void ReadAlterPDFformDataInSelectedPages()
{
PdfReader reader = new PdfReader(Server.MapPath(P_InputStream3));
reader.SelectPages("1-2"); //Work with only page# 1 & 2
using (PdfStamper stamper = new PdfStamper(reader, new FileStream(Server.MapPath(P_OutputStream), FileMode.Create)))
{
AcroFields form = stamper.AcroFields;
var fieldKeys = form.Fields.Keys;
foreach (string fieldKey in fieldKeys)
{
//Replace Address Form field with my custom data
if (fieldKey.Contains("Address"))
{
form.SetField(fieldKey, "MyCustomAddress");
}
}
//The below will make sure the fields are not editable in
//the output PDF.
stamper.FormFlattening = true;
}
}
//Extract text from an existing PDF's second page.
private string ExtractText()
{
PdfReader reader = new PdfReader(Server.MapPath(P_InputStream3));
string txt = PdfTextExtractor.GetTextFromPage(reader, 2, new LocationTextExtractionStrategy());
return txt;
}
//Create a brand new PDF from scratch and without a template
private void CreatePDFNoTemplate()
{
Document pdfDoc = new Document();
PdfWriter writer = PdfWriter.GetInstance(pdfDoc, new FileStream(Server.MapPath(P_OutputStream), FileMode.OpenOrCreate));
pdfDoc.Open();
pdfDoc.Add(new Paragraph("Some data"));
PdfContentByte cb = writer.DirectContent;
cb.MoveTo(pdfDoc.PageSize.Width / 2, pdfDoc.PageSize.Height / 2);
cb.LineTo(pdfDoc.PageSize.Width / 2, pdfDoc.PageSize.Height);
cb.Stroke();
pdfDoc.Close();
}
private void fillPDFForm()
{
string formFile = Server.MapPath(P_InputStream);
string newFile = Server.MapPath(P_OutputStream);
PdfReader reader = new PdfReader(formFile);
using (PdfStamper stamper = new PdfStamper(reader, new FileStream(newFile, FileMode.Create)))
{
AcroFields fields = stamper.AcroFields;
// set form fields
fields.SetField("name", "John Doe");
fields.SetField("address", "xxxxx, yyyy");
fields.SetField("postal_code", "12345");
fields.SetField("email", "johndoe#xxx.com");
// flatten form fields and close document
stamper.FormFlattening = true;
stamper.Close();
}
}
//Helper functions
private void SendEmail(MemoryStream ms)
{
MailAddress _From = new MailAddress("XXX#domain.com");
MailAddress _To = new MailAddress("YYY#a.com");
MailMessage email = new MailMessage(_From, _To);
Attachment attach = new Attachment(ms, new System.Net.Mime.ContentType("application/pdf"));
email.Attachments.Add(attach);
SmtpClient mailSender = new SmtpClient("Gmail-Server");
mailSender.Send(email);
}
private void DownloadAsPDF(MemoryStream ms)
{
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.ContentType = "application/pdf";
Response.AppendHeader("Content-Disposition", "attachment;filename=abc.pdf");
Response.OutputStream.Write(ms.GetBuffer(), 0, ms.GetBuffer().Length);
Response.OutputStream.Flush();
Response.OutputStream.Close();
Response.End();
ms.Close();
}
//Working with Memory Stream and PDF
public void CreatePDFFromMemoryStream()
{
//(1)using PDFWriter
Document doc = new Document();
MemoryStream memoryStream = new MemoryStream();
PdfWriter writer = PdfWriter.GetInstance(doc, memoryStream);
doc.Open();
doc.Add(new Paragraph("Some Text"));
writer.CloseStream = false;
doc.Close();
//Get the pointer to the beginning of the stream.
memoryStream.Position = 0;
//You may use this PDF in memorystream to send as an attachment in an email
//OR download as a PDF
SendEmail(memoryStream);
DownloadAsPDF(memoryStream);
//(2)Another way using PdfStamper
PdfReader reader = new PdfReader(Server.MapPath(P_InputStream2));
using (MemoryStream ms = new MemoryStream())
{
PdfStamper stamper = new PdfStamper(reader, ms);
AcroFields fields = stamper.AcroFields;
fields.SetField("SomeField", "MyValueFromDB");
stamper.FormFlattening = true;
stamper.Close();
SendEmail(ms);
}
}
//Burst-- Make each page of an existing multi-page PDF document
//as another brand new PDF document
private void PDFBurst()
{
string pdfTemplatePath = Server.MapPath(P_InputStream3);
PdfReader reader = new PdfReader(pdfTemplatePath);
//PdfCopy copy;
PdfSmartCopy copy;
for (int i = 1; i < reader.NumberOfPages; i++)
{
Document d1 = new Document();
copy = new PdfSmartCopy(d1, new FileStream(Server.MapPath(P_OutputStream).Replace(".pdf", i.ToString() + ".pdf"), FileMode.Create));
d1.Open();
copy.AddPage(copy.GetImportedPage(reader, i));
d1.Close();
}
}
//Copy a set of form fields from an existing PDF template/doc
//and keep appending to a brand new PDF file.
//The copied set of fields will have different values.
private void AppendSetOfFormFields()
{
PdfCopyFields _copy = new PdfCopyFields(new FileStream(Server.MapPath(P_OutputStream), FileMode.Create));
_copy.AddDocument(new PdfReader(a1("1")));
_copy.AddDocument(new PdfReader(a1("2")));
_copy.AddDocument(new PdfReader(new FileStream(Server.MapPath("~/MyPDFTemplates/Myaspx.pdf"), FileMode.Open)));
_copy.Close();
}
//ConcatenateForms
private byte[] a1(string _ToAppend)
{
using (var existingFileStream = new FileStream(Server.MapPath(P_InputStream), FileMode.Open))
using (MemoryStream stream = new MemoryStream())
{
// Open existing PDF
var pdfReader = new PdfReader(existingFileStream);
var stamper = new PdfStamper(pdfReader, stream);
var form = stamper.AcroFields;
var fieldKeys = form.Fields.Keys;
foreach (string fieldKey in fieldKeys)
{
form.RenameField(fieldKey, fieldKey + _ToAppend);
}
// "Flatten" the form so it wont be editable/usable anymore
stamper.FormFlattening = true;
stamper.Close();
pdfReader.Close();
return stream.ToArray();
}
}
//Working with Image
private void AddAnImage()
{
using (var inputPdfStream = new FileStream(#"C:\MyInput.pdf", FileMode.Open))
using (var inputImageStream = new FileStream(#"C:\img1.jpg", FileMode.Open))
using (var outputPdfStream = new FileStream(#"C:\MyOutput.pdf", FileMode.Create))
{
PdfReader reader = new PdfReader(inputPdfStream);
PdfStamper stamper = new PdfStamper(reader, outputPdfStream);
PdfContentByte pdfContentByte = stamper.GetOverContent(1);
var image = iTextSharp.text.Image.GetInstance(inputImageStream);
image.SetAbsolutePosition(1, 1);
pdfContentByte.AddImage(image);
stamper.Close();
}
}
//Add Company Letter-Head/Stationary to an existing pdf
private void AddCompanyStationary()
{
PdfReader reader = new PdfReader(Server.MapPath(P_InputStream2));
PdfReader s_reader = new PdfReader(Server.MapPath(P_InputStream4));
using (PdfStamper stamper = new PdfStamper(reader, new FileStream(Server.MapPath(P_OutputStream), FileMode.Create)))
{
PdfImportedPage page = stamper.GetImportedPage(s_reader, 1);
int n = reader.NumberOfPages;
PdfContentByte background;
for (int i = 1; i <= n; i++)
{
background = stamper.GetUnderContent(i);
background.AddTemplate(page, 0, 0);
}
stamper.Close();
}
}

Try this example:
using iTextSharp.text;
// Set up the fonts to be used on the pages
private Font _largeFont = new Font(Font.FontFamily.HELVETICA, 18, Font.BOLD, BaseColor.BLACK);
private Font _standardFont = new Font(Font.FontFamily.HELVETICA, 14, Font.NORMAL, BaseColor.BLACK);
private Font _smallFont = new Font(Font.FontFamily.HELVETICA, 10, Font.NORMAL, BaseColor.BLACK);
public void Build()
{
iTextSharp.text.Document doc = null;
try
{
// Initialize the PDF document
doc = new Document();
iTextSharp.text.pdf.PdfWriter writer = iTextSharp.text.pdf.PdfWriter.GetInstance(doc,
new System.IO.FileStream(System.IO.Directory.GetCurrentDirectory() + "\\ScienceReport.pdf",
System.IO.FileMode.Create));
// Set margins and page size for the document
doc.SetMargins(50, 50, 50, 50);
// There are a huge number of possible page sizes, including such sizes as
// EXECUTIVE, LEGAL, LETTER_LANDSCAPE, and NOTE
doc.SetPageSize(new iTextSharp.text.Rectangle(iTextSharp.text.PageSize.LETTER.Width,
iTextSharp.text.PageSize.LETTER.Height));
// Add metadata to the document. This information is visible when viewing the
// document properities within Adobe Reader.
doc.AddTitle("My Science Report");
doc.AddCreator("M. Lichtenberg");
doc.AddKeywords("paper airplanes");
// Add Xmp metadata to the document.
this.CreateXmpMetadata(writer);
// Open the document for writing content
doc.Open();
// Add pages to the document
this.AddPageWithBasicFormatting(doc);
this.AddPageWithInternalLinks(doc);
this.AddPageWithBulletList(doc);
this.AddPageWithExternalLinks(doc);
this.AddPageWithImage(doc, System.IO.Directory.GetCurrentDirectory() + "\\FinalGraph.jpg");
// Add page labels to the document
iTextSharp.text.pdf.PdfPageLabels pdfPageLabels = new iTextSharp.text.pdf.PdfPageLabels();
pdfPageLabels.AddPageLabel(1, iTextSharp.text.pdf.PdfPageLabels.EMPTY, "Basic Formatting");
pdfPageLabels.AddPageLabel(2, iTextSharp.text.pdf.PdfPageLabels.EMPTY, "Internal Links");
pdfPageLabels.AddPageLabel(3, iTextSharp.text.pdf.PdfPageLabels.EMPTY, "Bullet List");
pdfPageLabels.AddPageLabel(4, iTextSharp.text.pdf.PdfPageLabels.EMPTY, "External Links");
pdfPageLabels.AddPageLabel(5, iTextSharp.text.pdf.PdfPageLabels.EMPTY, "Image");
writer.PageLabels = pdfPageLabels;
}
catch (iTextSharp.text.DocumentException dex)
{
// Handle iTextSharp errors
}
finally
{
// Clean up
doc.Close();
doc = null;
}
}

You can always just create an html page and then convert that to pdf using wkhtmltopdf. This has the benefit of you not having to construct the pdf with a library such as iText. You just make a text file (html) and then pass it to the wkhtmltopdf executable.
See Calling wkhtmltopdf to generate PDF from HTML for more info.