Adding watermark to razorpdf mvc

Question

I am using the following code to generate pdf in mvc using itext with razorpdf producer

@model myModel.Models.Examform
@{
    Layout = null;
}
<itext creationdate="@DateTime.Now.ToString()" producer="RazorPDF">
    Hello
</text>

This code works fine. I want to add a watermark to the generated pdf. I know how to add the image. I need a watermark which shows in the background.

Answer 1

this is pretty much the exact same question

ItextSharp - RazorPdf put image on Pdf

so using the answer there should work for you:

<image url="@Context.Server.MapPath("~/Images/sampleImage.png")" />

Edit: To overlay text on the image, you need to modify your CSS and HTML.

How to position text over an image in css

Add "Watermark" effect with CSS?

http://www.the-art-of-web.com/css/textoverimage/

You might need to put the CSS inline.

Answer 2

I think it is not possible via markup.

If you have a look at PdfView.cs in RazorPDF source code, it uses XmlParser or HtmlParser in iTextsharpt to render pdf.

https://github.com/RazorAnt/RazorPDF/blob/master/RazorPDF/PdfView.cs

The support of markups in these two classes are limited. You can only do what they have implemented.

The alternative way is to use iTextsharp to create pdf via code.

Answer 3

Here is what I have done. The code goes in the controller.

[HttpPost]
public FileStreamResult Certificate(MyModel model)
{
    Stream fileStream = GeneratePDF(model);
    HttpContext.Response.AddHeader("content-disposition", "inline; filename=Certificate.pdf");

    var fileStreamResult = new FileStreamResult(fileStream, "application/pdf");
    return fileStreamResult;
}

public Stream GeneratePDF(HomeViewModel model)
{ 
    var rect = new Rectangle(288f, 144f);
    var doc = new Document(rect, 0, 0, 0, 0);

    BaseFont bfArialNarrow = BaseFont.CreateFont(Server.MapPath("../Content/fonts/ARIALN.ttf"), BaseFont.CP1252, BaseFont.EMBEDDED);

    //Full Background Image (Includes watermark)
    Image fullBackground = null;
    fullBackground = Image.GetInstance(Server.MapPath("../Content/images/Certificate/Cert1.jpg"));

    doc.SetPageSize(PageSize.LETTER.Rotate());

    MemoryStream memoryStream = new MemoryStream();
    PdfWriter pdfWriter = PdfWriter.GetInstance(doc, memoryStream);
    doc.Open();

    //Full Background Image
    fullBackground.Alignment = Image.UNDERLYING | Image.ALIGN_CENTER | Image.ALIGN_MIDDLE;
    doc.Add(fullBackground);

    Font myFont = new Font(bfArialNarrow, 57);
    var myParagraph = new Paragraph("Some text here.", myFont);
    doc.Add(myParagraph);

    pdfWriter.CloseStream = false;
    doc.Close();

    memoryStream.Position = 0;

    return memoryStream;
}