ByteScout PDF SDK – C# – Draw with Transparency in PDF

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ByteScout PDF SDK – C# – Draw with Transparency in PDF

printable version:
ByteScout-PDF-SDK-C-sharp-Draw-with-Transparency-in-PDF.pdf

How to draw with transparency in PDF in C# and ByteScout PDF SDK

The tutorial below will demonstrate how to draw with transparency in PDF in C#

These source code samples are listed and grouped by their programming language and functions they use. ByteScout PDF SDK is the SDK for pdf documents generation, modification and updates. Can also generate and fill PDF forms. Provides support for text (fonts, style, size, font family), layers, pdf form fields, vector and raster drawings and you can use it to draw with transparency in PDF with C#.

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 draw with transparency in PDF below and use it in your application. In order to implement the functionality, you should copy and paste this code for C# below into your code editor with your app, compile and run your application. This basic programming language sample code for C# will do the whole work for you to draw with transparency in PDF.

Trial version of ByteScout PDF SDK can be downloaded for free from our website. It also includes source code samples for C# and other programming languages.

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Program.cs

      using System.Diagnostics;
using Bytescout.PDF;

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

            Canvas canvas = page.Canvas;

            // Prepare pens and brushes
            Pen borderPen = new SolidPen(new ColorRGB(0, 0, 0), 2f);
            
            SolidBrush brush1 = new SolidBrush(new ColorRGB(255, 0, 0));
            SolidBrush brush2 = new SolidBrush(new ColorRGB(0, 0, 255));
            
            borderPen.Opacity = 50;
            brush1.Opacity = 30;
            brush2.Opacity = 60;

            // Draw normal rectangles
            canvas.DrawRectangle(brush1, 100, 100, 100, 100);
            canvas.DrawRectangle(borderPen, brush2, 150, 150, 100, 100);

            borderPen.Opacity = 80;
            brush1.Opacity = 60;
            brush2.Opacity = 30;

            // Draw rounded rectangles
            canvas.DrawRoundedRectangle(brush1, 220, 100, 100, 100, 10);
            canvas.DrawRoundedRectangle(borderPen, brush2, 270, 150, 100, 100, 10);
            
            // 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);
        }
    }
}