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How to add watermark to PDF file in C#, VB.NET

Watermark is a text, image, logo, or a graphical shape that appears in front of an existing PDF document. For example, you can apply a “Confidential” text to the pages with sensitive information.

Syncfusion Essential PDF is a .NET PDF library used to create, read, and edit PDF documents. Using this library, you can add watermark to PDF file in C# and VB.

Steps to create a PDF programmatically:

  1. Create a new C# console application project.

  1. Install the Syncfusion.Pdf.Base NuGet package as reference to your .NET Framework application from NuGet.org.

  1. Include the following namespace in the Program.cs file.

 

 

  1. Use the following code snippet to add watermark to an existing PDF.

 

 

You can download the working sample from CreateWatermarkPDFSample.Zip

By executing the program, you will get the PDF document as follows.

Take a moment to peruse the documentation, where you can find other options like adding image watermark in PDF document and features like images to PDF, Text to PDF, Layers, etc., with code examples.

Refer here to explore the rich set of Syncfusion Essential PDF features.

An online sample link to generate watermark PDF document

Note:

Starting with v16.2.0.x, if you reference Syncfusion assemblies from trial setup or from the NuGet feed, include a license key in your projects. Refer to link to learn about generating and registering Syncfusion license key in your application to use the components without trail message.

 

Article ID: Published Date: Last Revised Date: Platform: Control:
9072 08/03/2018 08/28/2018 Windows Forms PDF
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