ByteScout PDF SDK – C# – Add Watermarks to PDF

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ByteScout PDF SDK – C# – Add Watermarks to PDF

printable version:
ByteScout-PDF-SDK-C-sharp-Add-Watermarks-to-PDF.pdf

How to add watermarks to PDF in C# using ByteScout PDF SDK

Tutorial on how to add watermarks to PDF in C#

The code below will help you to implement an C# app to add watermarks to PDF. ByteScout PDF SDK can add watermarks to PDF. It can be used from C#. ByteScout PDF SDK is the pdf library that can create, update and modify PDF files. Supports text with fonts and style selections, layers, form fields, drawing lines and objects, automatic tables, images. Can be used to create and fill pdf forms.

You will save a lot of time on writing and testing code as you may just take the C# code from ByteScout PDF SDK for add watermarks to PDF below and use it in your application. Just copy and paste the code into your C# application’s code and follow the instruction. Further enhancement of the code will make it more vigorous.

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Program.cs

      using System.Diagnostics;
using Bytescout.PDF;

namespace Watermarks
{
    /// <summary>
    /// This example demonstrates how add text watermark to document page.
    /// </summary>
    class Program
    {
        static void Main()
        {
            // Create new document
            Document pdfDocument = new Document();
            pdfDocument.RegistrationName = "demo";
            pdfDocument.RegistrationKey = "demo";
            // Add pages
            pdfDocument.Pages.Add(new Page(PaperFormat.A4));
            pdfDocument.Pages.Add(new Page(PaperFormat.A4));
            pdfDocument.Pages.Add(new Page(PaperFormat.A4));

            // Add tiling watermark
            TextWatermark watermark1 = new TextWatermark("Tiling Watermark");
            watermark1.WatermarkLocation = TextWatermarkLocation.Tiled;
            watermark1.Angle = 30;
            SolidBrush brush1 = new SolidBrush(new ColorRGB(0, 0, 255));
            brush1.Opacity = 50; // make the brush semitransparent
            watermark1.Brush = brush1;
            pdfDocument.Watermarks.Add(watermark1);

            // Add autosized watermark to every page of the document
            TextWatermark watermark2 = new TextWatermark("Diagonal Watermark");
            watermark2.WatermarkLocation = TextWatermarkLocation.DiagonalFromBottomLeftToTopRight;
            watermark2.Font = new Font("Times New Roman", 16);
            SolidBrush brush2 = new SolidBrush(new ColorRGB(255, 0, 0));
            brush2.Opacity = 50; // make the brush semitransparent
            watermark2.Brush = brush2;
            watermark2.Pen = new SolidPen(new ColorRGB(255, 0, 0)); // outline pen is optional
            pdfDocument.Watermarks.Add(watermark2);

            // Add watermark of custom size and location to the first page only
            TextWatermark watermark3 = new TextWatermark("Simple Watermark");
            watermark3.Font = new Font(StandardFonts.HelveticaBold, 24);
            watermark3.Brush = new SolidBrush(new ColorRGB(0, 128, 0));
            watermark3.Left = 350;
            watermark3.Top = 800;
            pdfDocument.Pages[0].Watermarks.Add(watermark3);
            
            // Save document to file
            pdfDocument.Save("result.pdf");

            // Cleanup 
            pdfDocument.Dispose();

            // Open result document in default associated application (for demo purpose)
            ProcessStartInfo processStartInfo = new ProcessStartInfo("result.pdf");
            processStartInfo.UseShellExecute = true;
            Process.Start(processStartInfo);
        }
    }
}