How to add watermark to an existing PDF file+ASPOSE+C#

Pawan Bhise

Hi All,

I need to add Watermark to an existing PDF file.I am using ASPOSE dll with c#.
If any have worked,please help me.

Thanks & Regards,
pbsam09

3 Replies

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Lisa White10y ago
hi there,

your description was not very clear. which type of watermark do you want to add? image or text?

I would suggest you to use following library to add watermark to existing pdf, coz it's quite convenient for me:
https://www.nuget.org/packages/FreeSpire.PDF/

if you want to add text watermark, refer this sample:
https://code.msdn.microsoft.com/Add-a-text-watermark-on-e56799cf

if you want to add image watermark, refer this code snippet:
PdfDocument pdf = new PdfDocument();
pdf.LoadFromFile("sample.pdf");
PdfPageBase page = pdf.Pages[0];
Image img = Image.FromFile("img.jpg");
page.BackgroundImage = img;
pdf.SaveToFile("ImageWaterMark.pdf");

if my answer is helpful, hope you can accept it, thanks!
alva christeen10y ago
Hello,

I would like to recommend PDF watermark for Mac that help you to add text or image watermark to every page of PDF file like company name, company logo, or add signature. You can even add text watermark.
http://www.completepdfsolutions.com/pdf-watermark-mac.php
Florentin Badea12y ago
I recommend ExpertPdf. It's a powerful html to pdf converter.

Here is how you can add an watermark to an existing pdf document with ExpertPdf:

using ExpertPdf.HtmlToPdf.PdfDocument;
Document document = new Document(fileName);

Template watermarkTemplate = document.AddTemplate(boundings);

PdfFont watermarkTextFont = document.AddFont(StdFontBaseFamily.HelveticaBold);
watermarkTextFont.Size = 10;
TextElement watermarkTextElement = new TextElement(3, 0, "This is Watermark Text", watermarkTextFont);
watermarkTextElement.Transparency = 100;

watermarkTemplate.AddElement(watermarkTextElement);

document.Save(fileName2);