We're using iTextSharp to create a copy of a page range of PDF files. This works just fine, however when copying PDF files that contain hidden text, this text is outputted to the result of the copy anyways.
This is the PDF copying logic:
using (var reader = new DisposablePdfReader(filePath))
{
int pageCount = reader.NumberOfPages;
Document doc = null;
PdfCopy copy = null;
var stream = new MemoryStream();
doc = new Document();
copy = new PdfCopy(doc, stream);
doc.Open();
foreach (int pageNumber in pages)
if (pageNumber > 0 && pageNumber <= pageCount)
{
copy.AddPage(copy.GetImportedPage(reader, pageNumber));
}
return new MemoryStream(stream.ToArray());
}
Any ideas as to how to make hidden text stay hidden, in the resulting copy? Thanks in advance.
Related
I'm having an issue when attempting to create a PDF with an image using iTextSharp. I'm adding the image to the top of the PDF like a masthead and then the rest of the PDF is HTML. The PDF generates fine and displays correctly when viewed in Edge, Chrome and Firefox. But, if you open it in IE or in Adobe Reader, the masthead is completely scrambled. The rest of the PDF (the HTML content) generates as expected in all browsers and programs. I've googled for days now trying to discover if anyone else has had this issue, but all I can find is text being garbled, not images. Below is the code I'm using to generate the image. Any ideas?
using (var document = new Document(PageSize.A4, 10f, 10f, 10f, 10f))
{
iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(Server.MapPath("~/Content/Images/kfa_masthead.jpg"));
using (var ms = new MemoryStream())
{
image.Left = 10f;
image.Top = image.Height;
image.ScaleAbsolute(560f, 58f);
using (var writer = PdfWriter.GetInstance(document, ms))
{
document.Open();
writer.CloseStream = false;
//Add the masthead
document.Add(image);
//Add the report information
var html = CreateTable(profile);
using (var xHtml = new StringReader(html))
{
XMLWorkerHelper.GetInstance().ParseXHtml(writer, document, xHtml);
}
document.CloseDocument();
document.Close();
}
return ms.ToArray();
}
}
There are tips in "iText In Action" that cover setting fonts, as well as the "FontFactory.RegisterDirectories" method (which is, as the book says...an expensive call). However, in my case, the font that I want to use for new fields is already embedded in the document (in an existing Acrofield). With no guarantee that the same font will exist on the user's machine (or on a web server)....is there a way that I can register that already-embedded font, so that I can re-use it for other objects? In the code below, Acrofield "TheFieldIWantTheFontFrom" has the font that I want to re-use for a field named "my_new_field". Any help would be greatly appreciated!
using (MemoryStream output = new MemoryStream())
{
// Use iTextSharp PDF Reader, to get the fields and send to the
//Stamper to set the fields in the document
PdfReader pdfReader = new PdfReader(#"C:\MadScience\MSE_030414.pdf");
// Initialize Stamper (ms is a MemoryStream object)
PdfStamper pdfStamper = new PdfStamper(pdfReader, output);
// Get Reference to PDF Document Fields
AcroFields pdfFormFields = pdfStamper.AcroFields;
//*** CODE THAT HAVE NOT YET BEEN ABLE TO MAKE USE OF TO ASSIST WITH MY FONT ISSUE
//*** MIGHT BE HELP?
//List<object[]> fonts = BaseFont.GetDocumentFonts(pdfReader);
//BaseFont[] baseFonts = new BaseFont[fonts.Count];
//string[] fn = new string[fonts.Count];
//for (int i = 0; i < fonts.Count; i++)
//{
// Object[] obj = (Object[])fonts[i];
// baseFonts[i] = BaseFont.CreateFont((PRIndirectReference)(obj[1]));
// fn[i] = baseFonts[i].PostscriptFontName.ToString();
// //Console.WriteLine(baseFonts[i].FamilyFontName[0][1].ToString());
// //FontFactory.RegisteredFonts.Add(fn[i]);
// //FontFactory.Register(
// Console.WriteLine(fn[i]);
//}
//ICollection<string> registeredFonts = iTextSharp.text.FontFactory.RegisteredFonts;
//foreach (string s in registeredFonts)
//{
// Console.WriteLine("pre-registered: " + s);
//}
if (!FontFactory.Contains("georgia-bold"))
{
FontFactory.RegisterDirectories();
Console.WriteLine("had to register everything"); }
//registeredFonts = iTextSharp.text.FontFactory.RegisteredFonts;
//foreach (string s in registeredFonts)
//{
// Console.WriteLine("post-registered: " + s);
//}
Font myfont = FontFactory.GetFont("georgia-bold");
string nameOfField = "my_field";
AcroFields.Item fld = pdfFormFields.GetFieldItem(nameOfField);
//set the text of the form field
pdfFormFields.SetField(nameOfField, "test stuff");
pdfFormFields.SetField("TheFieldIWantTheFontFrom", "test more stuff");
bool madeit = pdfFormFields.SetFieldProperty(nameOfField, "textfont", myfont.BaseFont, null);
bool madeit2 = pdfFormFields.SetFieldProperty(nameOfField, "textsize", 8f, null);
pdfFormFields.RegenerateField(nameOfField);
// Set the flattening flag to false, so the document can continue to be edited
pdfStamper.FormFlattening = true;
// close the pdf stamper
pdfStamper.Close();
//get the bytes from the MemoryStream
byte[] content = output.ToArray();
using (FileStream fs = File.Create(#"C:\MadScience\MSE_Results.pdf"))
{
//byte[] b = outList[i];
fs.Write(content, 0, (int)content.Length);
fs.Flush();
}
}
Yes you can re-use fonts and the PDF specification actually encourages it. You should, however, keep in mind that some fonts may be embedded as subsets only.
The below code is adapted from this post (be careful, that site has nasty popups sometimes). See the comments in the code for more information. This code was tested against iTextSharp 5.4.4.
/// <summary>
/// Look for the given font name (not file name) in the supplied PdfReader's AcroForm dictionary.
/// </summary>
/// <param name="reader">An open PdfReader to search for fonts in.</param>
/// <param name="fontName">The font's name as listed in the PDF.</param>
/// <returns>A BaseFont object if the font is found or null.</returns>
static BaseFont findFontInForm(PdfReader reader, String fontName) {
//Get the document's acroform dictionary
PdfDictionary acroForm = (PdfDictionary)PdfReader.GetPdfObject(reader.Catalog.Get(PdfName.ACROFORM));
//Bail if there isn't one
if (acroForm == null) {
return null;
}
//Get the resource dictionary
var DR = acroForm.GetAsDict(PdfName.DR);
//Get the font dictionary (required per spec)
var FONT = DR.GetAsDict(PdfName.FONT);
//Look for the actual font and return it
return findFontInFontDict(FONT, fontName);
}
/// <summary>
/// Helper method to look at a specific font dictionary for a given font string.
/// </summary>
/// <remarks>
/// This method is a helper method and should not be called directly without knowledge of
/// the internals of the PDF spec.
/// </remarks>
/// <param name="fontDict">A /FONT dictionary.</param>
/// <param name="fontName">Optional. The font's name as listed in the PDF. If not supplied then the first font found is returned.</param>
/// <returns>A BaseFont object if the font is found or null.</returns>
static BaseFont findFontInFontDict(PdfDictionary fontDict, string fontName) {
//This code is adapted from http://osdir.com/ml/java.lib.itext.general/2004-09/msg00018.html
foreach (var internalFontName in fontDict.Keys) {
var internalFontDict = (PdfDictionary)PdfReader.GetPdfObject(fontDict.Get(internalFontName));
var baseFontName = (PdfName)PdfReader.GetPdfObject(internalFontDict.Get(PdfName.BASEFONT));
//// compare names, ignoring the initial '/' in the baseFontName
if (fontName == null || baseFontName.ToString().IndexOf(fontName) == 1) {
var iRef = (PRIndirectReference)fontDict.GetAsIndirectObject(internalFontName);
if (iRef != null) {
return BaseFont.CreateFont(iRef);
}
}
}
return null;
}
And here's the test code that runs this. It first creates a sample document with an embedded font and then it creates a second document based upon that and re-uses that font. In your code you'll need to actually know beforehand what the font name is that you're searching for. If you don't have ROCK.TTF (Rockwell) installed you'll need to pick a different font file to run this.
//Test file that we'll create with an embedded font
var file1 = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "test.pdf");
//Secondary file that we'll try to re-use the font above from
var file2 = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "test2.pdf");
//Path to font file that we'd like to use
var fontFilePath = System.IO.Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Fonts), "ROCK.TTF");
//Create a basefont object
var font = BaseFont.CreateFont(fontFilePath, BaseFont.WINANSI, true);
//Get the name that we're going to be searching for later on.
var searchForFontName = font.PostscriptFontName;
//Step #1 - Create sample document
//The below block creates a sample PDF file with an embedded font in an AcroForm, nothing too special
using (var fs = new FileStream(file1, FileMode.Create, FileAccess.Write, FileShare.None)) {
using (var doc = new Document()) {
using (var writer = PdfWriter.GetInstance(doc, fs)) {
doc.Open();
//Create our field, set the font and add it to the document
var tf = new TextField(writer, new iTextSharp.text.Rectangle(50, 50, 400, 150), "first-name");
tf.Font = font;
writer.AddAnnotation(tf.GetTextField());
doc.Close();
}
}
}
//Step #2 - Look for font
//This uses a stamper to draw on top of the existing PDF using a font already embedded
using (var fs = new FileStream(file2, FileMode.Create, FileAccess.Write, FileShare.None)) {
using (var reader = new PdfReader(file1)) {
using (var stamper = new PdfStamper(reader, fs)) {
//Try to get the font file
var f = findFontInForm(reader, searchForFontName);
//Make sure we found something
if (f != null) {
//Draw some text
var cb = stamper.GetOverContent(1);
cb.BeginText();
cb.MoveText(200, 400);
cb.SetFontAndSize(f, 72);
cb.ShowText("Hello!");
cb.EndText();
}
}
}
}
EDIT
I made a small modification to the findFontInFontDict method above. The second parameter is now optional. If null it returns the first font object that it finds in the supplied dictionary. This change allows me to introduce the below method which looks for a specific field by name and gets the font.
static BaseFont findFontByFieldName(PdfReader reader, String fieldName) {
//Get the document's acroform dictionary
PdfDictionary acroForm = (PdfDictionary)PdfReader.GetPdfObject(reader.Catalog.Get(PdfName.ACROFORM));
//Bail if there isn't one
if (acroForm == null) {
return null;
}
//Get the fields array
var FIELDS = acroForm.GetAsArray(PdfName.FIELDS);
if (FIELDS == null || FIELDS.Length == 0) {
return null;
}
//Loop through each field reference
foreach (var fieldIR in FIELDS) {
var field = (PdfDictionary)PdfReader.GetPdfObject(fieldIR);
//Check the field name against the supplied field name
if (field.GetAsString(PdfName.T).ToString() == fieldName) {
//Get the resource dictionary
var DR = acroForm.GetAsDict(PdfName.DR);
//Get the font dictionary (required per spec)
var FONT = DR.GetAsDict(PdfName.FONT);
return findFontInFontDict(FONT);
}
}
return null;
}
I have the following code that generates a pdf into the stream. This works well but i now have the following requirements.
1) make page landscape: Looking at other examples they add the property to the document object. But i'm doing this instream. So how would i add this property?
2) Add page numbers. I need to put items into a grid so that there are x number of rows per page. With a page number at the footer of the page. How can this kind of feature be acheived with Itext sharp.
public static void Create(ICollection<Part> parts, string path)
{
PdfReader reader = new PdfReader(path);
var pageWidth = 500;
byte[] bytes;
using (MemoryStream ms = new MemoryStream())
{
using (PdfStamper stamper = new PdfStamper(reader, ms))
{
PdfContentByte cb = stamper.GetOverContent(1);
//Flush the PdfStamper's buffer
stamper.Close();
//Get the raw bytes of the PDF
bytes = ms.ToArray();
var now = String.Format("{0:d-M-yyyy}", DateTime.Now);
var pdfName = string.Format("{0}_factory_worksheet", now).Replace("%", "").Replace(" ", "_");
var context = HttpContext.Current;
context.Response.ContentType = "application/pdf";
context.Response.AddHeader("content-disposition", "attachment;filename=" + pdfName);
context.Response.Buffer = true;
context.Response.Clear();
context.Response.OutputStream.Write(ms.GetBuffer(), 0, ms.GetBuffer().Length);
context.Response.OutputStream.Flush();
context.Response.End();
}
}
}
I don't really know how you handling it C# but logical flow will be like this:
Use PdfDictionary to rotate content in reader to 90 degree.Assuming your pdf contain multiple pages,
PdfReader reader = new PdfReader(path);
for (int pgCnt=1; pgCnt <= reader.getNumberOfPages(); pgCnt++) {
//Logic to implement rotation & Add Page number
}
To get current rotation(assuming you are using Portrait mode & try to convert it in landscape mode) use int rttnPg = reader.getPageRotation(pgCnt); also get the PdfDictionary of that page pgDctnry=reader.getPageN(i);(I named that variable as pgDctnry)
Now to rotate it in 90 degree use
pgDctnry.put(PdfName.ROTATE, new PdfNumber(rttnPg+90));
Now bind it using PdfStamper as you are currently doing it.Now to add page number get over content(here i named it pgCntntBt) of the current page
pgCntntBt = stamper .getOverContent(pgCnt);
rctPgSz = rdrPgr.getPageSizeWithRotation(pgCnt);
pgCntntBt.beginText();
bfUsed=//Base Font used for text to be displayed.Also set font size pgCntntBt.setFontAndSize(bfUsed,8.2f);
txtPg=String.format(pgTxt+" %d/%d",pgCnt,totPgCnt);
pgCntntBt.showTextAligned(2,txtPg,//Put Width,//Put Height,//Rotation);
pgCntntBt.endText();
Actually i don't understand what you mean by this:"I need to put items into a grid so that there are x number of rows per page. With a page number at the footer of the page".Now close the stamper to flush it in outputstream.
I have to insert a an image in a pdf. That is, wherever I see a text 'Signature', I have to insert an signature image there . I can do by saying absolute positions .
But, I am looking for how to find the position of the word 'Signature' in the pdf and insert the image.
Appreciate ur help!
This is the working code:
using (Stream inputImageStream = new FileStream(#"C:\signature.jpeg", FileMode.Open, FileAccess.Read, FileShare.Read))
using (Stream outputPdfStream = new FileStream(#"C:\test\1282011\Result.pdf", FileMode.Create, FileAccess.Write, FileShare.None))
{
var reader = new PdfReader(#"C:\Test\1282011\Input.pdf");
var stamper = new PdfStamper(reader, outputPdfStream);
var count = reader.NumberOfPages;
iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(inputImageStream);
image.SetAbsolutePosition(300, 200); // Absolute position
image.ScaleToFit(200, 30);
PRTokeniser pkt = null;
string strpages = string.Empty;
System.Text.StringBuilder build = new System.Text.StringBuilder();
for (int i = 1; i <= count; i++)
{
var pdfContentByte = stamper.GetOverContent(i);
if (pdfContentByte != null)
{
pkt = new PRTokeniser(stamper.Reader.GetPageContent(i));
while (pkt.NextToken())
{
if (pkt.TokenType == PRTokeniser.TokType.STRING)
{
if (pkt.StringValue == "Signature")
{
pdfContentByte.AddImage(image);
}
}
}
}
}
stamper.Close();
}
}
After some googling, I found out that I could absolute position of text as follows:
extSharp.text.pdf.AcroFields fields = stamper.AcroFields;
IList<iTextSharp.text.pdf.AcroFields.FieldPosition> signatureArea = fields.GetFieldPositions("Signature");
iTextSharp.text.Rectangle rect= signatureArea.First().position;
iTextSharp.text.Rectangle logoRect = new iTextSharp.text.Rectangle(rect);
image.SetAbsolutePosition(logoRect.Width ,logoRect .Height );
But the variable , signatureArea is null all the time even when the pdf contains the word 'Signature'.
Any input..? :)
Jaleel
Check out PdfTextExtractor and specifically the LocationTextExtractionStrategy. Create a class in your project with the exact code for the LocationTextExtractionStrategy and put a breakpoint on the line return sb.ToString(); (line 131 in SVN) and take a look at the contents of the variable locationalResult. You'll see pretty much exactly what you're looking for, a collection of text with start and end locations. If your search word isn't on a line by itself you might have to dig a little deeper but this should point you in the right direction.
That was perfect Chris. I am able to find the text position and insert the signature. What I understood is , there is a list List<TextChunk> LocationalResult in the LocationTextExtractionStrategy class. The RenderText() method in LocationTextExtractionStrategy will add each text to the LocationalResult list.
Actually the list LocationalResult is a private list, I made it public to access it from outside.
I loop through each page of PDF document and call PdfTextExtractor.GetTextFromPage(reader, i, locationStrat); where i is the pagenumber. At this time all text in the page will be added to the LocationalResult with all the position information.
This is what I done . And it works perfect.
I'm having a problem trying to locate a PdfContentByte directly into an specific page. My problem is: I need to add an Image for each page (That works) and need to add a QRCode to each of the pages at the right bottom corner but this works only for the first Page and I don't know how to repeat it on the other ones.
This is my code:
public string GeneratePDFDocument(Atomic.Development.Montenegro.Data.Entities.Document document, Stamp stamp)
{
string filename = #"C:\Users\Sheldon\Desktop\Pdf.Pdf";
FileStream fs = new FileStream(filename, FileMode.Create);
iTextSharp.text.Document pdfDocument = new iTextSharp.text.Document(PageSize.LETTER, PAGE_LEFT_MARGIN, PAGE_RIGHT_MARGIN, PAGE_TOP_MARGIN, PAGE_BOTTOM_MARGIN);
iTextSharp.text.pdf.PdfWriter writer = iTextSharp.text.pdf.PdfWriter.GetInstance(pdfDocument, fs);
pdfDocument.Open();
int count = document.Pages.Count;
foreach (Page page in document.Pages)
{
Image img = Image.GetInstance(page.Image);
img.ScaleToFit(PageSize.LETTER.Width-(PAGE_LEFT_MARGIN + PAGE_RIGHT_MARGIN), PageSize.LETTER.Height-(PAGE_TOP_MARGIN + PAGE_BOTTOM_MARGIN));
pdfDocument.Add(img);
PlaceCodeBar(writer);
}
pdfDocument.Close();
writer.Close();
fs.Close();
return filename;
}
private static void PlaceCodeBar(iTextSharp.text.pdf.PdfWriter writer)
{
String codeText = "TEXT TO ENCODE";
iTextSharp.text.pdf.BarcodePDF417 pdf417 = new iTextSharp.text.pdf.BarcodePDF417();
pdf417.SetText(codeText);
Image img = pdf417.GetImage();
iTextSharp.text.pdf.BarcodeQRCode qrcode = new iTextSharp.text.pdf.BarcodeQRCode(codeText, 1, 1, null);
img = qrcode.GetImage();
iTextSharp.text.pdf.PdfContentByte cb = writer.DirectContent;
cb.SaveState();
cb.BeginText();
img.SetAbsolutePosition(PageSize.LETTER.Width-PAGE_RIGHT_MARGIN-img.ScaledWidth, PAGE_BOTTOM_MARGIN);
cb.AddImage(img);
cb.EndText();
cb.RestoreState();
}
So add it in your foreach (Page...) loop:
foreach (Page page in document.Pages)
{
Image img = Image.GetInstance(page.Image);
img.ScaleToFit(PageSize.LETTER.Width-(PAGE_LEFT_MARGIN + PAGE_RIGHT_MARGIN), PageSize.LETTER.Height-(PAGE_TOP_MARGIN + PAGE_BOTTOM_MARGIN));
pdfDocument.Add(img);
PlaceCodeBar(writer);
}
If this is a second pass on the same PDF (you've closed it then opened it again), use a PdfStamper rather than a PdfWriter. You can then get the direct content of each page rather than the one direct content that is reused (and reset) for each page.
PS: Drop the BeginText() and EndText() calls. Those operators should only be used when actually drawing text/setting fonts/etc. No line art. No images. The SaveState()/RestoreState() are good though. Definitely keep those.
I just figure out how to solve the problem. Just delete the cb.SaveState() and cb.RestoreState() and it put the image on the page is actually active.