public void RemovetWatermarkPDF(string sourceFile, string destinationPath)
{
PdfDocument pdfDoc = new PdfDocument(new PdfReader(sourceFile), new PdfWriter(destinationPath));
var numberOfPages = pdfDoc.GetNumberOfPages();
for (var i = 1; i <= numberOfPages; i++)
{
// PdfAnnotation
PdfDictionary pageDict = pdfDoc.GetPage(i).GetPdfObject();
PdfArray annots = pageDict.GetAsArray(PdfName.Annots);
for (int j = 0; j < annots.Size(); j++)
{
PdfDictionary annotation = annots.GetAsDictionary(j);
if (PdfName.Watermark.Equals(annotation.GetAsName(PdfName.Subtype)))
{
string x = annotation.GetAsString(PdfName.NM).GetValue();
if (x == AnnotName)
{
annotation.Clear();
}
}
}
}
pdfDoc.Close();
}
public byte[] Add(string infile, string outFile)
{
PdfFont baseFont = PdfFontFactory.CreateFont(StandardFonts.HELVETICA_BOLD, Encoding.ASCII.EncodingName, false);
Rectangle pageSize;
string NoOfPagesPadded = string.Empty;
string PageNoPadded = string.Empty;
string HdrLeft = string.Empty;
string HdrRight = string.Empty;
int xLeft = 30;
int xRight = 110; //was 100
int xTop = 30;
float watermarkTrimmingRectangleWidth; //= 300;
float watermarkTrimmingRectangleHeight = 300;
float formXOffset = 0;
float formYOffset = -5; // was zero set to -5 because dangling letters (e.g. g) were being cut-off
byte[] outByteFile;
byte[] inByteFile = null;
try
{
inByteFile = File.ReadAllBytes(infile);
IRandomAccessSource inSourceFile = new RandomAccessSourceFactory().CreateSource(inByteFile);
using (PdfReader reader = new PdfReader(inSourceFile, new ReaderProperties()).SetUnethicalReading(true))
{
using (var outMemoryFile = new MemoryStream())
{
using (PdfWriter pdfWrite = new PdfWriter(outMemoryFile))
{
using (PdfDocument pdfDoc = new PdfDocument(reader, pdfWrite))
{
using (Document doc = new Document(pdfDoc))
{
int n = pdfDoc.GetNumberOfPages();
for (var i = 1; i <= n; i++)
{
// Remove annotation if it exists
PdfDictionary pageDict = pdfDoc.GetPage(i).GetPdfObject();
PdfArray annots = pageDict.GetAsArray(PdfName.Annots);
if (annots != null)
{
for (int j = 0; j < annots.Size(); j++)
{
PdfDictionary annotation = annots.GetAsDictionary(j);
if (PdfName.Watermark.Equals(annotation.GetAsName(PdfName.Subtype)))
{
string NMvalue = annotation.GetAsString(PdfName.NM).GetValue();
if (NMvalue == AnnotName)
{
annotation.Clear();
}
}
}
}
}
for (int i = 1; i <= n; i++)
{
PdfPage page = pdfDoc.GetPage(i);
pageSize = page.GetMediaBox();
watermarkTrimmingRectangleWidth = pageSize.GetWidth();
float PageWidth = pageSize.GetWidth();
float PageHeight = pageSize.GetHeight();
int rotation = page.GetRotation();
Rectangle watermarkTrimmingRectangle = new Rectangle(pageSize.GetLeft() + xLeft, pageSize.GetTop() - xTop, watermarkTrimmingRectangleWidth, watermarkTrimmingRectangleHeight);
PdfWatermarkAnnotation watermark = new PdfWatermarkAnnotation(watermarkTrimmingRectangle);
watermark.SetName(new PdfString(AnnotName));
Rectangle formRectangle = new Rectangle(formXOffset, formYOffset, watermarkTrimmingRectangleWidth, watermarkTrimmingRectangleHeight);
PdfFormXObject form = new PdfFormXObject(formRectangle); //Observation: font XObject will be resized to fit inside the watermark rectangle. If it is larger, your text will be stretched.
PdfCanvas canvasOver = new PdfCanvas(form, pdfDoc);
canvasOver.SetFillColor(iText.Kernel.Colors.ColorConstants.RED);
canvasOver.SetFontAndSize(baseFont, 10);
canvasOver.SaveState();
string SDSNo = "z2345678";
HdrLeft = CompanyName + $" SDS# {SDSNo}";
// HdrLeft = $"PWidth: {PageWidth.ToString()} rotation: {rotation.ToString()}"; //qqtempqq
NoOfPagesPadded = (n.ToString());
PageNoPadded = i.ToString();
HdrRight = $"Page {PageNoPadded} of {NoOfPagesPadded}";
// HdrRight = $"PHeight: {PageHeight.ToString()}"; //qqtempqq
canvasOver.BeginText()
.SetColor(iText.Kernel.Colors.ColorConstants.RED, true)
.SetFontAndSize(baseFont, 10)
.ShowText(HdrLeft)
.EndText();
canvasOver.BeginText()
.MoveText(formRectangle.GetRight() - xRight, 0)
.SetColor(iText.Kernel.Colors.ColorConstants.RED, true)
.SetFontAndSize(baseFont, 10)
.ShowText(HdrRight)
.EndText();
canvasOver.SaveState();
canvasOver.RestoreState();
canvasOver.Release();
watermark.SetAppearance(PdfName.N, new PdfAnnotationAppearance(form.GetPdfObject()));
watermark.SetFlags(PdfAnnotation.PRINT);
page.AddAnnotation(watermark);
}
}
}
outByteFile = outMemoryFile.ToArray();
}
}
}
File.WriteAllBytes(outFile, outByteFile);
}
catch (Exception ex)
{
Console.WriteLine("Error:" + ex.ToString());
return(inByteFile);
throw;
}
return(outByteFile);
}
