This is a follow up question to:
Programmatically change the color of a black box in a PDF file?
I have a pdf I created in Illustrator that has basically a black shape in the middle of the page and nothing else. I need to change the color of that shape dynamically.
From the response to the post above I am using iTextSharp (.NET C#) to get the raw contents of the PDF through ContentByteUtils.GetContentBytesForPage() and changing the color at the raw level.
Problem is that I can't find any way of saving the results back into either the original PDF or a new PDF file via iTextSharp. I'm currently stuck with a byte array of the raw contents but need to figure out how to save.
Help please!
Why are you using ContentByteUtils.GetContentBytesForPage()?
I would use:
PdfReader reader = new PdfReader(src);
byte[] content = reader.GetPageContent(pageNumber);
// do stuff with content
reader.SetPageContent(pageNumber, content);
using (FileStream fs = new FileStream(outputFile, FileMode.Create, FileAccess.Write, FileShare.None)) {
using (PdfStamper stamper = new PdfStamper(reader, fs)) {
}
}
Related
I am using grails 2.5.2.
I have created a table which shows all the data from database to gsp page and now i need to save that shown data in a pdf format with a button click.What will be the best way to show them into a PDF and save it to my directory. please Help
You can use itext for converting HTML into pdf using the code below:
public void createPdf(HttpServletResponse response, String args, String css, String pdfTitle) {
response.setContentType("application/force-download")
response.setHeader("Content-Disposition", "attachment;filename=${pdfTitle}.pdf")
Document document = new Document()
Rectangle one = new Rectangle(900, 600)
document.setPageSize(one)
PdfWriter writer = PdfWriter.getInstance(document, response.getOutputStream())
document.open()
ByteArrayInputStream bis = new ByteArrayInputStream(args.toString().getBytes())
ByteArrayInputStream cis = new ByteArrayInputStream(css.toString().getBytes())
XMLWorkerHelper.getInstance().parseXHtml(writer, document, bis, cis)
document.close()
}
Though answering this question late,take a look at grails export plugin.It will be useful if you want to export your data to excel and pdf( useful only if there is no in pre-defined template to export).
Got idea from itext. Used itext 2.1.7 and posted all the values to pdf from a controller method. Used images as background and paragraph and phrase to show values from database.
My application is grabbing pdf bytes from our db and sending the pdf to an iframe, using the itextsharp library. When the pdf is displayed in the iframe, the toolbar and navigation pane show, but we'd like to hide those. When I load a pdf document by simply typing in the pdf's url with #toolbar=0&navpanes=0, I see the result I'm looking for.
The application logic is using PdfStamper to add some buttons and other data to the pdf. When I write the pdf to the Response.Outputstream, the pdf shows up with the added buttons, and all is good except that I can't get rid of the toolbar and navpanes. I've tried adding "toolbar=0&navpanes=0" to the url in the response header, but to no avail.
I've written a test application which shows that using PdfSmartCopy instead of the stamper works perfectly - the pdf is shown in the browser which hides the toolbar and navpane by default.
The problem is that I still need to add some buttons to the pdf via the stamper. I've written a test app which adds the buttons via the stamper, then the smart copy grabs each page from the stamper and writes all this out to the Response.Output. The pdf shows in the browser with no toolbar or navpanes, but the buttons are not there.
Here is the code which uses both the stamper and the smart copy - your help is greatly appreciated:
private void SendStamperToCopy()
{
try
{
String filePath = #"C:\debug\PerfIndicWithDefaults.pdf";
byte[] pdfBytes = ReadFile(filePath);
Document document = new Document();
PdfSmartCopy copy = new PdfSmartCopy(document, Response.OutputStream);
document.Open();
MemoryStream memStream = new MemoryStream();
PdfReader reader = new PdfReader(pdfBytes);
PdfStamper pdfStamper = new PdfStamper(reader, memStream);
// add a button with the stamper
iTextSharp.text.Rectangle rectCancel = new iTextSharp.text.Rectangle(50, 50, 20, 20);
PushbuttonField btnCancel = new PushbuttonField(pdfStamper.Writer, rectCancel, "Cancel");
btnCancel.Text = "Cancel";
iTextSharp.text.pdf.PdfAnnotation fieldCancel = btnCancel.Field;
pdfStamper.AddAnnotation(fieldCancel, 1);
int numOfPgs = reader.NumberOfPages;
for (int n = 1; n <= numOfPgs; n++)
{
copy.AddPage(pdfStamper.GetImportedPage(reader, n));
}
String headerStr = "inline; filename=PerfIndicWithDefaults.pdf";
Response.AppendHeader("content-disposition", headerStr);
Response.ContentType = "application/pdf";
Response.OutputStream.Flush();
document.Close();
Response.OutputStream.Close();
}
catch (Exception ex)
{
Console.Write(ex);
Response.OutputStream.Flush();
Response.OutputStream.Close();
}
}
If I understand your question correctly, you want to use PdfStamper to add a button and you want to change the viewer preferences. This can be done like this:
PdfReader reader = new PdfReader(source);
System.IO.MemoryStream m = new System.IO.MemoryStream();
PdfStamper stamper = new PdfStamper(reader, m);
PdfStamper.ViewerPreferences = PdfWriter.HideToolbar | PdfWriter.PageModeUseNone;
stamper.Close();
reader.Close();
The HideToolbar will hide the toolbar, whereas PageModeUseNone means that you don't show any panels (such as the bookmarks panel, etc...).
It is not clear why you would need PdfSmartCopy in this context. Maybe I'm missing something. Also: there are some strange errors in your code: you never close the stamper instance, yet you import a page from the stamper into the copy instance. I've never seen any one try that. It's certainly not what I had in mind when I wrote iText. Your code is very confusing to me.
I am trying to add javascript into a pdf using itext and later merge it with another pdf.
But the final merged pdf does not contain the javascript. The javascript is working fine if the pdf is not merged with another pdf.
Merging code :
FileOutputStream sectionR = new FileOutputStream(RESULT);
PdfCopyFields copier = new PdfCopyFields(sectionR);
for (String curInPath : listFile) {
PdfReader reader = new PdfReader(curInPath);
copier.addDocument(reader);
}
copier.close();
I tried to add JS to the resulting merged pdf, but it is not taking it. I guess its not editable.
Below is the code adding JS to pdf which is not merged yet.
FileOutputStream section1Pdf = new FileOutputStream("newPDFSection");
PdfReader readerSection1 = new PdfReader("Existing PDF - Section 1");
PdfStamper stamperSection1 = new PdfStamper(readerSection1,section1Pdf);
stamperSection1.addJavaScript(
"var nameField = this.getField('txtOwnerCity');" + "nameField.setAction('Keystroke'," +"'forceUpperCase()');" +
"" +"function forceUpperCase(){" +
"if(!event.willCommit)event.change = " +
"event.change.toUpperCase();" +
"}");
When I tried adding JS to the resulting merged pdf, it does not allow me saying it is not editable anymore.
This is how I am trying to add
FileOutputStream sectionR = new FileOutputStream(RESULT);
PdfCopyFields copier = new PdfCopyFields(sectionR);
for (String curInPath : listFile) {
PdfReader reader = new PdfReader(curInPath);
copier.addDocument(reader);
}
copier.close();
PdfReader readersectionResult = new PdfReader("result.pdf");
PdfStamper stamper = new PdfStamper(readersectionResult, new FileOutputStream("newResult.pdf"));
stamper.addJavaScript(some JS);
The error I am getting is ' WARNING: Cannot set header. Response already committed.'
I am not sure if I am doing it right above, All I am trying to do is get pdfstamper of resulting pdf to add new JS to it.
When I am trying to edit form filed values, it says not editable anymore.
AcroFields acro= stamper .getAcroFields();
acro.setField("txtOfficerName"+officerChar,officerSO.getFullName());
string pdfTemplate = #"Trust App form.pdf";
string newFile = #"Trust App form Completed.pdf";
PdfReader pdfReader = new PdfReader(pdfTemplate);
PdfStamper pdfStamper = new PdfStamper(pdfReader, new FileStream(
newFile, FileMode.Create));
AcroFields pdfFormFields = pdfStamper.AcroFields;
pdfFormFields.SetField("trust.trustee.entityname.line1", "Gulistan-e-Jauhar Karachi");
pdfStamper.FormFlattening = false;
pdfStamper.Close();
I am able to fill pdf forms using Itext sharp pdf.
But problem is this pdf is for .net. I WANT TO USE IT IN SILVERLIGHT.
Is there any alternative? for filling pdf form in silverlight... what i think itext sharp give silverpdf (http://silverpdf.codeplex.com/) but there is pdfstamper and acrofields classes in silverpdf.
SilverPDF looks to be inspired/based-on iTextSharp and PDFSharp, but it doesn't use an identical class layout by any means.
I just poked around in their code a bit (they have no docs that I could find), and it looks like you need to get the field's PdfAcroField object from the PdfAcroForm, which you get from a PdfDocument, which in turn you get from PdfReader.open(...).
When the docs aren't good enough, check the code if at all possible.
Is it possible to programmatically embed a SWF in a PDF from a C# application?
You can use the c# port of the iText library. It's called iTextSharp.
http://itextsharp.com/
An example of what the code could look like:
// create an output file stream which will be used to capture the generated file
string outputFileName = "output.pdf";
FileStream outputFile = new FileStream(outputFileName, FileMode.Create);
// open the original pdf file as a PdfReader
PdfReader reader = new PdfReader("inputfile.pdf");
// open the output pdf file as a PdfStamper
PdfStamper stamper = new PdfStamper(reader, outputFile);
// inserts a blank page at the start of the document
stamper.InsertPage(1, PageSize.A4);
// add the flash file to the output document as an annotation
PdfFileSpecification fs = PdfFileSpecification.FileEmbedded(stamper.Writer, flashFileTextBox.Text, flashFileTextBox.Text, null);
PdfAnnotation flashInsert = PdfAnnotation.CreateScreen(stamper.Writer, new Rectangle(50f,791f,545f,420f),"Flash Insert",fs, "application/x-shockwave-flash", true);
stamper.AddAnnotation(flashInsert,1);
stamper.Close();
reader.Close();
Flash SWF files can be embedded into a PDF document programmatically. Have a look at the PDF library from webSupergoo. The documentation includes examples in C# and VB.NET.