Add the following headers to aspx page
using iTextSharp;
using iTextSharp.text;
using iTextSharp.text.pdf;
The following method will create a barcode image
public void CreateBarCode()
{
Document doc = new Document(PageSize.A4);
PdfWriter.GetInstance(doc, new FileStream(path, FileMode.CreateNew));
doc.Open();
System.IO.MemoryStream mem = new MemoryStream();
Barcode128 barImg = new Barcode128();
barImg.Code = "TRISHANK";
barImg.CreateDrawingImage(System.Drawing.iTextSharp.text.Color.Black, System.Drawing.Color.White).Save(mem, System.Drawing.Imaging.ImageFormat.Png);
Image imgs = iTextSharp.text.Image.GetInstance(mem.ToArray());
mem.Flush();
mem.Close();
doc.Add(imgs);
doc.Close();
}
Output :
The following code will add watermark text to pdf document
You need to add the following headers to your aspx page
using iTextSharp;
using iTextSharp.text;
using iTextSharp.text.pdf;
The following method will add watermark text
public static byte[] WriteToPdf(FileInfo sourceFile, string stringToWriteToPdf)
{
PdfReader reader = new PdfReader(sourceFile.FullName);
using (MemoryStream memoryStream = new MemoryStream())
{
PdfStamper pdfStamper = new PdfStamper(reader, memoryStream);
for (int i = 1; i <= reader.NumberOfPages; i++)
{
Rectangle pageSize = reader.GetPageSizeWithRotation(i);
PdfContentByte pdfPageContents = pdfStamper.GetUnderContent(i);
pdfPageContents.BeginText();
BaseFont baseFont = BaseFont.CreateFont(BaseFont.HELVETICA_BOLD, BaseFont.CP1252, false);
pdfPageContents.SetFontAndSize(baseFont,80);
pdfPageContents.SetRGBColorFill(137, 142, 136);
float textAngle =(float) GetHypotenuseAngleInDegreesFrom(pageSize.Height, pageSize.Width);
pdfPageContents.ShowTextAligned(PdfContentByte.ALIGN_CENTER, stringToWriteToPdf, pageSize.Width/2, pageSize.Height/2, textAngle);
pdfPageContents.EndText();
}
pdfStamper.FormFlattening = true;
pdfStamper.Close();
reader.Close();
return memoryStream.ToArray();
}
}
The following method will set the angle for the watermark text
public static double GetHypotenuseAngleInDegreesFrom(double opposite, double adjacent)
{
double radians = Math.Atan2(opposite, adjacent);
double angle = radians*(180/Math.PI);
return angle;
}
Output :
