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Creating a blank pdf and uploading an image to each page

I am new to file handling in asp.net core 6.0. I want to create a blank pdf and load images from the ImagePath list into it. Using the resources on the internet, I tried to create a blank pdf and throw it into it, but in vain.
I couldn't use pdfReader inside pdfStamper. It was the only resource on the Internet that I found suitable for myself.
Link to the question; Converting Multiple Images into Multiple Pages PDF using itextsharp
How can I do that my code is below.
public static string MainStamping(string docname, List < string > imagePath, string mediaField) {
var config = new ConfigurationBuilder().AddJsonFile("appsettings.json").Build();
var webRootPath = config["AppSettings:urunResimPath"].ToString();
string filename = webRootPath + "\\menupdf\\" + docname + ".pdf";
// yeniisim = yeniisim + filelist.FileName;
// var fileName = "menupdf\\" + yeniisim;
FileStream pdfOutputFile = new FileStream(filename, FileMode.Create);
PdfConcatenate pdfConcatenate = new PdfConcatenate(pdfOutputFile);
PdfReader result = null;
for (int i = 0; i < imagePath.Count; i++) {
result = CreatePDFDocument1(imagePath[i], mediaField);
pdfConcatenate.AddPages(result);
}
pdfConcatenate.Close();
return filename;
}
public static PdfReader CreatePDFDocument1(string imagePath, string mediaField) {
PdfReader pdfReader = null;
//C:\Users\hilal\OneDrive\Belgeler\GitHub\Restaurant\Cafe.Web\wwwroot\assets\barkod-menu
var config = new ConfigurationBuilder().AddJsonFile("appsettings.json").Build();
var webRootPath = config["AppSettings:urunResimPath"].ToString();
string image = webRootPath + "\\barkod-menu\\" + imagePath;
iTextSharp.text.Image instanceImg = iTextSharp.text.Image.GetInstance(image);
MemoryStream inputStream = new MemoryStream();
inputStream.Seek(0, SeekOrigin.Begin); //I don't know what to do here do I need to use it?
pdfReader = new PdfReader(inputStream);
MemoryStream memoryStream = new MemoryStream();
PdfStamper pdfStamper = new PdfStamper(pdfReader, memoryStream);
AcroFields testForm = pdfStamper.AcroFields;
testForm.SetField("MediaField", mediaField);
PdfContentByte overContent = pdfStamper.GetOverContent(1);
IList < AcroFields.FieldPosition > fieldPositions = testForm.GetFieldPositions("ImageField");
if (fieldPositions == null || fieldPositions.Count <= 0) throw new ApplicationException("Error locating field");
AcroFields.FieldPosition fieldPosition = fieldPositions[0];
overContent.AddImage(instanceImg);
pdfStamper.FormFlattening = true;
pdfStamper.Close();
PdfReader resultReader = new PdfReader(memoryStream.ToArray());
pdfReader.Close();
return resultReader;
}
If I want to explain visually, the blank pdf I created will be uploaded in this way. Thank you

The following shows how to create a PDF using iTextSharp (v. 5.5.13.3), and add images to the PDF (one image per page). It's been tested with .NET 6.
Pre-requisite:
Download / install NuGet package iTextSharp (v. 5.5.13.3)
Add the following using statements:
using iTextSharp.text;
using iTextSharp.text.pdf;
using System.IO;
In the code below the PDF is saved to a byte array, instead of a file to allow for more options.
CreatePdfDocument:
public static byte[] CreatePdfDocument(List<string> imagePaths)
{
byte[] pdfBytes;
using (MemoryStream ms = new MemoryStream())
{
using (Document doc = new Document(PageSize.LETTER, 1.0f, 1.0f, 1.0f, 1.0f))
{
using (PdfWriter writer = PdfWriter.GetInstance(doc, ms))
{
//open
doc.Open();
//create a new page for each image
for (int i = 0; i < imagePaths.Count; i++)
{
//add new page
doc.NewPage();
//get image
iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance(imagePaths[i]);
//ToDo: set desired image size
//img.ScaleAbsolute(100.0f, 100.0f);
//center image on page
img.SetAbsolutePosition((PageSize.LETTER.Width - img.ScaledWidth) / 2, (PageSize.LETTER.Height - img.ScaledHeight) / 2);
//add image to page
doc.Add(img);
}
//close
doc.Close();
//convert MemoryStream to byte[]
pdfBytes = ms.ToArray();
}
}
}
return pdfBytes;
}
I've decided that all I want to do is write the PDF to a file. The method below writes the PDF to a file.
CreatePdf:
public static void CreatePdf(string filename, List<string> imagePaths)
{
//create PDF
byte[] pdfBytes = CreatePdfDocument(imagePaths);
//save PDF to file
System.IO.File.WriteAllBytes (filename, pdfBytes);
}
Resources:
How to generate PDF one page one row from datatable using iTextSharp
iTextSharp - Working with images
Center image in pdf using itextsharp
Additional Resources:
iTextSharp: How to resize an image to fit a fix size?

Adding a HTML page as a last page to PDF document

I am creating a PDF Document consisting 6 images (1 Image on 1 Page) using iTextSharp.
I need to add a HTML Page as a last page after the 6th Image.
I have tried the below, but the HTML does not get added on a new page, instead gets attached immediately below the 5th Image.
Please advice how to make the html add to the last page.
Code for reference:
string ImagePath = HttpContext.Current.Server.MapPath("~/Images/");
string[] fileNames = System.IO.Directory.GetFiles(ImagePath);
string outputFileNames = "Test.pdf";
string outputFilePath = System.Web.Hosting.HostingEnvironment.MapPath("~/Pdf/" + outputFileNames);
Document doc = new Document(PageSize.A4, 20, 20, 20, 20);
System.IO.Stream st = new FileStream(outputFilePath, FileMode.Create, FileAccess.Write);
PdfWriter writer = PdfWriter.GetInstance(doc, st);
doc.Open();
writer.PageEvent = new Footer();
for (int i = 0; i < fileNames.Length; i++)
{
string fname = fileNames[i];
if (System.IO.File.Exists(fname) && Path.GetExtension(fname) == ".png")
{
iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance(fname);
img.Border = iTextSharp.text.Rectangle.BOX;
img.BorderColor = iTextSharp.text.BaseColor.BLACK;
doc.Add(img);
}
}
byte[] pdf; // result will be here
var cssText = File.ReadAllText(MapPath("~/Style1.css"));
var html = File.ReadAllText(MapPath("~/HtmlPage1.html"));
using ( var memoryStream = new MemoryStream())
{
using (var cssMemoryStream = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(cssText)))
{
using (var htmlMemoryStream = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(html)))
{
XMLWorkerHelper.GetInstance().ParseXHtml(writer, doc, htmlMemoryStream, cssMemoryStream);
}
}
pdf = memoryStream.ToArray();
//document.Add(new Paragraph(Encoding.UTF8.GetString(pdf)));
}
doc.NewPage();
doc.Add(new Paragraph(Encoding.UTF8.GetString(pdf)));
doc.Close();
writer.Close();
I need to add a HTML Page as a last page after the 6th Image.
Any help is appreciated

In contrast to what you assume according to your code comments, pdf is not where the result will be. It remains empty:
byte[] pdf; // result will be here
...
using ( var memoryStream = new MemoryStream())
{
... code not accessing memoryStream ...
pdf = memoryStream.ToArray();
//document.Add(new Paragraph(Encoding.UTF8.GetString(pdf)));
}
doc.NewPage();
doc.Add(new Paragraph(Encoding.UTF8.GetString(pdf)));
Thus, you add the new page before adding an empty paragraph, after the converted html already has been added to the document.
Actually it is added during
XMLWorkerHelper.GetInstance().ParseXHtml(writer, doc, htmlMemoryStream, cssMemoryStream);
So you have to add the new page before that. Thus, the following replacing everything from your byte[] pdf; on should do the job:
var cssText = File.ReadAllText(MapPath("~/Style1.css"));
var html = File.ReadAllText(MapPath("~/HtmlPage1.html"));
using (var cssMemoryStream = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(cssText)))
{
using (var htmlMemoryStream = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(html)))
{
doc.NewPage();
XMLWorkerHelper.GetInstance().ParseXHtml(writer, doc, htmlMemoryStream, cssMemoryStream);
}
}
doc.Close();
As an aside, don't close the writer! It implicitly is closed when the doc is closed. Closing it again does nothing at best or damage otherwise.
In a comment you claimed
but this also does not resolve the issue... the pdf content still get added after the image and then continued on new page.
So I tested the proposed change. Obviously I don't have your environment and also not your image, html, and css files. Thus, I used own ones, a small screen shot and "<html><body><h1>Test</h1><p>This is a test piece of html</p></body></html>".
With your code I get:
With the code changed as described above I get
My impression here is that the proposed code change does resolve the issue. The html content is added on a new page.
Thus apparently your either incorrectly applied the proposed change, or you executed old code, or you inspected some old result.

how to add pagenumbers to every pdf page using itextsharp

here is What i want i want to add page numbers to every pdf page that i generated on the fly.
i used on end page method but it did not worked out even when i added the doc bottom margin.
I decided to add the page numbers after the pdf is generated from the file path.
here is my code for generating pdf:
Document doc = new Document(iTextSharp.text.PageSize.LETTER, 10, 10, 42, 35);
PdfWriter wri = PdfWriter.GetInstance(doc, new FileStream("t5.pdf", FileMode.Create));
doc.Open();//Open Document to write
iTextSharp.text.Font font8 = FontFactory.GetFont("ARIAL", 7);
Paragraph paragraph = new Paragraph("Some content");
doc.Add(paragraph);
doc.Add(paragraph);// add paragraph to the document
doc.Close();
FileStream stream = File.OpenRead("t5.pdf");
byte[] fileBytes = new byte[stream.Length];
stream.Read(fileBytes, 0, fileBytes.Length);
stream.Close();
AddPageNumbers(fileBytes);
using (Stream file = File.OpenWrite("t5.pdf"))
{
file.Write(fileBytes, 0, fileBytes.Length);
}
}
and her is my add pagenumbers method:
MemoryStream ms = new MemoryStream();
PdfReader reader = new PdfReader(pdf);
int n = reader.NumberOfPages;
iTextSharp.text.Rectangle psize = reader.GetPageSize(1);
Document document = new Document(psize, 50, 50, 50, 50);
PdfWriter writer = PdfWriter.GetInstance(document, ms);
document.Open();
PdfContentByte cb = writer.DirectContent;
int p = 0;
for (int page = 1; page <= reader.NumberOfPages; page++)
{
document.NewPage();
p++;
PdfImportedPage importedPage = writer.GetImportedPage(reader, page);
cb.AddTemplate(importedPage, 0, 0);
BaseFont bf = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
cb.BeginText();
cb.SetFontAndSize(bf, 10);
cb.ShowTextAligned(PdfContentByte.ALIGN_CENTER, +p + "/" + n, 100, 450, 0);
cb.EndText();
}
document.Close();
return ms.ToArray();
how ever it does not add the page numbers to the pdf document so what is the alternatives here? what can i do.

When posting a question here, please only post the smallest amount of code possible. Your "create a sample PDF with multiple pages" is 116 lines long. Inside of it you've got complicated PdfPTable and DataTable logic that is 100% unrelated to the problem. Instead, the following 13 lines is enough to make a multiple page PDF:
//Create a sample multiple page PDF and place it on the desktop
var outputFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "t5.pdf");
using (var fs = new FileStream(outputFile, FileMode.Create, FileAccess.Write, FileShare.None)) {
using (var doc = new Document()) {
using (var writer = PdfWriter.GetInstance(doc, fs)) {
doc.Open();
for (var i = 0; i < 1000; i++) {
doc.Add(new Paragraph(String.Format("This is paragraph #{0}", i)));
}
doc.Close();
}
}
}
Second, get rid of try/catch. Those are great for production (sometimes) but at the development level that's why we have IDEs and compilers, they'll tell us specifically what's wrong.
Now on to the bigger problem, you need to keep these two processes separate from each other. Every single brace and object from part part #1 must be closed, done and accounted for. Part #2 then needs to be fed a completely valid PDF but neither of the two parts should be "aware" of each other or depend on each other.
Since you just borrowed some code that wasn't intended for what you're trying to do I'm going to also ignore that and use some code that I know specifically will work. Also, since you're open to using a MemoryStream in the first place I'm just going to avoid writing to disk until I need to. Below is a full working sample that creates a multiple page and then adds page numbers in a second pass.
//Will hold our PDF as a byte array
Byte[] bytes;
//Create a sample multiple page PDF, nothing special here
using (var ms = new MemoryStream()) {
using (var doc = new Document()) {
using (var writer = PdfWriter.GetInstance(doc, ms)) {
doc.Open();
for (var i = 0; i < 1000; i++) {
doc.Add(new Paragraph(String.Format("This is paragraph #{0}", i)));
}
doc.Close();
}
}
//Store our bytes before
bytes = ms.ToArray();
}
//Read our sample PDF and apply page numbers
using (var reader = new PdfReader(bytes)) {
using (var ms = new MemoryStream()) {
using (var stamper = new PdfStamper(reader, ms)) {
int PageCount = reader.NumberOfPages;
for (int i = 1; i <= PageCount; i++) {
ColumnText.ShowTextAligned(stamper.GetOverContent(i), Element.ALIGN_CENTER, new Phrase(String.Format("Page {0} of {1}", i, PageCount)), 100, 10 , 0);
}
}
bytes = ms.ToArray();
}
}
var outputFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "t5.pdf");
System.IO.File.WriteAllBytes(outputFile, bytes);

Adding text to existing multipage PDF document in memorystream using iTextSharp

I am trying to add text to an existing PDF file using iTextSharp. I have been reading many posts, including the popular thread here.
I have some differences:
My PDF are X pages long
I want to keep everything in memory, and never have a file stored on my filesystem
So I tried to modify the code, so it takes in a byte array and returns a byte array. I have come this far:
The code compiles and runs
My out byte array has a different length than my in byte array
My problem:
I cannot see my added text when i later store the modified byte array and open it in my PDF reader
I don't get why. From every StackOverflow post I have seen, I do the same. using the DirectContent, I use BeginText and write a text. However, i cannot see it, no matter how I move the position around.
Any idea what is missing from my code?
public static byte[] WriteIdOnPdf(byte[] inPDF, string str)
{
byte[] finalBytes;
// open the reader
using (PdfReader reader = new PdfReader(inPDF))
{
Rectangle size = reader.GetPageSizeWithRotation(1);
using (Document document = new Document(size))
{
// open the writer
using (MemoryStream ms = new MemoryStream())
{
using (PdfWriter writer = PdfWriter.GetInstance(document, ms))
{
document.Open();
for (var i = 1; i <= reader.NumberOfPages; i++)
{
document.NewPage();
var baseFont = BaseFont.CreateFont(BaseFont.HELVETICA_BOLD, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
var importedPage = writer.GetImportedPage(reader, i);
var contentByte = writer.DirectContent;
contentByte.BeginText();
contentByte.SetFontAndSize(baseFont, 18);
var multiLineString = "Hello,\r\nWorld!";
contentByte.ShowTextAligned(PdfContentByte.ALIGN_LEFT, multiLineString,100, 200, 0);
contentByte.EndText();
contentByte.AddTemplate(importedPage, 0, 0);
}
document.Close();
ms.Close();
writer.Close();
reader.Close();
}
finalBytes = ms.ToArray();
}
}
}
return finalBytes;
}

The code below shows off a full-working example of creating a PDF in memory and then performing a second pass, also in memory. It does what #mkl says and closes all iText parts before trying to grab the raw bytes from the stream. It also uses GetOverContent() to draw "on top" of the previous pdf. See the code comments for more details.
//Bytes will hold our final PDFs
byte[] bytes;
//Create an in-memory PDF
using (var ms = new MemoryStream()) {
using (var doc = new Document()) {
using (var writer = PdfWriter.GetInstance(doc, ms)) {
doc.Open();
//Create a bunch of pages and add text, nothing special here
for (var i = 1; i <= 10; i++) {
doc.NewPage();
doc.Add(new Paragraph(String.Format("First Pass - Page {0}", i)));
}
doc.Close();
}
}
//Right before disposing of the MemoryStream grab all of the bytes
bytes = ms.ToArray();
}
//Another in-memory PDF
using (var ms = new MemoryStream()) {
//Bind a reader to the bytes that we created above
using (var reader = new PdfReader(bytes)) {
//Store our page count
var pageCount = reader.NumberOfPages;
//Bind a stamper to our reader
using (var stamper = new PdfStamper(reader, ms)) {
//Setup a font to use
var baseFont = BaseFont.CreateFont(BaseFont.HELVETICA_BOLD, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
//Loop through each page
for (var i = 1; i <= pageCount; i++) {
//Get the raw PDF stream "on top" of the existing content
var cb = stamper.GetOverContent(i);
//Draw some text
cb.BeginText();
cb.SetFontAndSize(baseFont, 18);
cb.ShowText(String.Format("Second Pass - Page {0}", i));
cb.EndText();
}
}
}
//Once again, grab the bytes before closing things out
bytes = ms.ToArray();
}
//Just to see the final results I'm writing these bytes to disk but you could do whatever
var testFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "test.pdf");
System.IO.File.WriteAllBytes(testFile, bytes);

Copy pdf annotations via C#

I have a stream (PDF file with annotations) and another stream (the same PDF file without annotations). I use streams because I need to execute this operations in memory.
I need to copy annotations from first document to another. Annotations can be different: comments, highlighting and other. So it is better to copy annotations without parsing it.
Can you advice me some helpful PDF library for .NET? And some sample for this problem.

You can use this example for iTextSharp to approach your problem (this example copies a list of pdf files with annotations into a new pdf file):
var output = new MemoryStream();
using (var document = new Document(PageSize.A4, 70f, 70f, 20f, 20f))
{
var readers = new List<PdfReader>();
var writer = PdfWriter.GetInstance(document, output);
writer.CloseStream = false;
document.Open();
const Int32 requiredWidth = 500;
const Int32 zeroBottom = 647;
const Int32 left = 50;
Action<String, Action> inlcudePdfInDocument = (filename, e) =>
{
var reader = new PdfReader(filename);
readers.Add(reader);
var pageCount = reader.NumberOfPages;
for (var i = 0; i < pageCount; i++)
{
e?.Invoke();
var imp = writer.GetImportedPage(reader, (i + 1));
var scale = requiredWidth / imp.Width;
var height = imp.Height * scale;
writer.DirectContent.AddTemplate(imp, scale, 0, 0, scale, left, zeroBottom - height);
var annots = reader.GetPageN(i + 1).GetAsArray(PdfName.ANNOTS);
if (annots != null && annots.Size != 0)
{
foreach (var a in annots)
{
var newannot = new PdfAnnotation(writer, new Rectangle(0, 0));
var annotObj = (PdfDictionary) PdfReader.GetPdfObject(a);
newannot.PutAll(annotObj);
var rect = newannot.GetAsArray(PdfName.RECT);
rect[0] = new PdfNumber(((PdfNumber)rect[0]).DoubleValue * scale + left); // Left
rect[1] = new PdfNumber(((PdfNumber)rect[1]).DoubleValue * scale); // top
rect[2] = new PdfNumber(((PdfNumber)rect[2]).DoubleValue * scale + left); // right
rect[3] = new PdfNumber(((PdfNumber)rect[3]).DoubleValue * scale); // bottom
writer.AddAnnotation(newannot);
}
}
document.NewPage();
}
}
foreach (var apprPdf in pdfs)
{
document.NewPage();
inlcudePdfInDocument(apprPdf.Pdf, null);
}
document.Close();
readers.ForEach(x => x.Close());
}
output.Position = 0;
return output;
PdfReader has a constructor that takes an array of bytes so you can adapt it for MemoryStream.

I'm using ITextSharp which is forked from IText (a java implemenation fpr pdf editing).
http://sourceforge.net/projects/itextsharp/
http://itextpdf.com/
Edit - this is what you need to do (untested but shoul be close):
using System;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;
// return processed stream (a new MemoryStream)
public Stream copyAnnotations(Stream sourcePdfStream, Stream destinationPdfStream)
{
// Create new document (IText)
Document outdoc = new Document(PageSize.A4);
// Seek to Stream start and create Reader for input PDF
m.Seek(0, SeekOrigin.Begin);
PdfReader inputPdfReader = new PdfReader(sourcePdfStream);
// Seek to Stream start and create Reader for destination PDF
m.Seek(0, SeekOrigin.Begin);
PdfReader destinationPdfReader = new PdfReader(destinationPdfStream);
// Create a PdfWriter from for new a pdf destination stream
// You should write into a new stream here!
Stream processedPdf = new MemoryStream();
PdfWriter pdfw = PdfWriter.GetInstance(outdoc, processedPdf);
// do not close stream if we've read everything
pdfw.CloseStream = false;
// Open document
outdoc.Open();
// get number of pages
int numPagesIn = inputPdfReader.NumberOfPages;
int numPagesOut = destinationPdfReader.NumberOfPages;
int max = numPagesIn;
// Process max number of pages
if (max<numPagesOut)
{
throw new Exception("Impossible - different number of pages");
}
int i = 0;
// Process Pdf pages
while (i < max)
{
// Import pages from corresponding reader
PdfImportedPage pageIn = writer.inputPdfReader(reader, i);
PdfImportedPage pageOut = writer.destinationPdfReader(reader, i);
// Get named destinations (annotations
List<Annotations> toBeAdded = ParseInAndOutAndGetAnnotations(pageIn, pageOut);
// add your annotations
foreach (Annotation anno in toBeAdded) pageOut.Add(anno);
// Add processed page to output PDFWriter
outdoc.Add(pageOut);
}
// PDF creation finished
outdoc.Close();
// your new destination stream is processedPdf
return processedPdf;
}
The implementation of ParseInAndOutAndGetAnnotations(pageIn, pageOut) needs to reflect your annotations.
Here is a good example with annotations: http://www.java2s.com/Open-Source/Java-Document/PDF/pdf-itext/com/lowagie/text/pdf/internal/PdfAnnotationsImp.java.htm