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Pdf Library for .NET
Pdf Stamps And Watermarks

Stamps and Watermarks are done using pdf templates that contain elements that repeat on each page of the pdf document.

Pdf Stamps Sample Code

This sample code shows how to create a new PDF document using Select.Pdf, how to add several pages and stamp all the pages with an image.

// create a new pdf document
PdfDocument doc = new PdfDocument();

// create a new pdf font
PdfFont font = doc.AddFont(PdfStandardFont.Helvetica);
font.Size = 24;

// add a new page to the document
PdfPage page = doc.AddPage();

// create a new text element and add it to the page
PdfTextElement text = new PdfTextElement(0, 0, Helper.SomeLongText(), font);
page.Add(text);

// get image path
string imgFile = Server.MapPath("~/files/logo.png");

// stamp all pages - add a template containing an image to the bottom right of 
// the page the image should repeat on all pdf pages automatically
PdfTemplate template = doc.AddTemplate(doc.Pages[0].ClientRectangle);
PdfImageElement img = new PdfImageElement(
    doc.Pages[0].ClientRectangle.Width - 300, 
    doc.Pages[0].ClientRectangle.Height - 150, imgFile);
template.Add(img);

// save pdf document
doc.Save(Response, false, "Sample.pdf");

// close pdf document
doc.Close();
Pdf Watermarks Sample Code

This sample code shows how to create a new PDF document using Select.Pdf, how to add several pages and watermark all the pages with a transparent image in the background.

// create a new pdf document
PdfDocument doc = new PdfDocument();

// create a new pdf font
PdfFont font = doc.AddFont(PdfStandardFont.Helvetica);
font.Size = 24;

// add a new page to the document
PdfPage page = doc.AddPage();

// create a new text element and add it to the page
PdfTextElement text = new PdfTextElement(0, 0, Helper.SomeLongText(), font);
page.Add(text);

// get image path
string imgFile = Server.MapPath("~/files/logo.png");

// watermark all pages - add a template containing an image 
// to the bottom right of the page
// the image should repeat on all pdf pages automatically
// the template should be rendered behind the rest of the page elements
PdfTemplate template = doc.AddTemplate(doc.Pages[0].ClientRectangle);
PdfImageElement img = new PdfImageElement(
    doc.Pages[0].ClientRectangle.Width - 300, 
    doc.Pages[0].ClientRectangle.Height - 150, imgFile);
img.Transparency = 50;
template.Background = true;
template.Add(img);

// save pdf document
doc.Save(Response, false, "Sample.pdf");

// close pdf document
doc.Close();
See Also

Reference

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