ByteScout Premium Suite – C# – Set invisible text over image in pdf with pdf sdk

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ByteScout Premium Suite – C# – Set invisible text over image in pdf with pdf sdk

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ByteScout-Premium-Suite-C-sharp-Set-invisible-text-over-image-in-pdf-with-pdf-sdk.pdf

How to set invisible text over image in pdf with pdf sdk in C# with ByteScout Premium Suite

If you want to learn more then this tutorial will show how to set invisible text over image in pdf with pdf sdk in C#

These source code samples are assembled by their programming language and functions they apply. ByteScout Premium Suite: the bundle that includes twelve SDK products from ByteScout including tools and components for PDF, barcodes, spreadsheets, screen video recording. It can set invisible text over image in pdf with pdf sdk in C#.

Want to save time? You will save a lot of time on writing and testing code as you may just take the C# code from ByteScout Premium Suite for set invisible text over image in pdf with pdf sdk below and use it in your application. Simply copy and paste in your C# project or application you and then run your app! Complete and detailed tutorials and documentation are available along with installed ByteScout Premium Suite if you’d like to learn more about the topic and the details of the API.

All these programming tutorials along with source code samples and ByteScout free trial version are available for download from our website.

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Program.cs

      using System.Diagnostics;
using Bytescout.PDF;

namespace InvisibleTextOverImage
{
    /// <summary>
    /// This example demonstrates how to create PDF document from scanned document image and add invisible text over it. 
    /// </summary>
    class Program
    {
        static void Main()
        {
            // Create new PDF document
            Document pdfDocument = new Document();
            pdfDocument.RegistrationName = "demo";
            pdfDocument.RegistrationKey = "demo";


            // Load image from file to System.Drawing.Image object (we need it to get the image resolution)
            System.Drawing.Image sysImage = System.Drawing.Image.FromFile(@".\scanned-invoice.png");
            // Compute image size in PDF units (Points)
            float widthInPoints = sysImage.Width / sysImage.HorizontalResolution * 72f;
            float heightInPoints = sysImage.Height / sysImage.VerticalResolution * 72f;

            // Create page of computed size
            Page page = new Page(widthInPoints, heightInPoints);
            // Add page to the document
            pdfDocument.Pages.Add(page);

            Canvas canvas = page.Canvas;

            // Create Bytescout.PDF.Image object from loaded image
            Image pdfImage = new Image(sysImage);
            // Draw the image
            canvas.DrawImage(pdfImage, 0, 0, widthInPoints, heightInPoints);

            // Dispose the System.Drawing.Image object to free resources
            sysImage.Dispose();

            // Create brush
            SolidBrush transparentBrush = new SolidBrush(new ColorGray(0));
            // ... and make it transparent
            transparentBrush.Opacity = 0;

            // Draw text with transparent brush
            Font font16 = new Font(StandardFonts.Helvetica, 16);
            canvas.DrawString("Your Company Name", font16, transparentBrush, 40, 40);
            // Draw another text
            Font font10 = new Font(StandardFonts.Helvetica, 10);
            canvas.DrawString("Your Address", font10, transparentBrush, 40, 80);

            
            // 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);
        }
    }
}