ByteScout Premium Suite – C# – Sign pdf and set security with pdf sdk

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ByteScout Premium Suite – C# – Sign pdf and set security with pdf sdk

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ByteScout-Premium-Suite-C-sharp-Sign-pdf-and-set-security-with-pdf-sdk.pdf

How to sign pdf and set security with pdf sdk in C# using ByteScout Premium Suite

Continuous learning is a crucial part of computer science and this tutorial shows how to sign pdf and set security with pdf sdk in C#

Every ByteScout tool includes simple example C# source codes that you can get here or in the folder with installed ByteScout product. ByteScout Premium Suite: the set that includes 12 SDK products from ByteScout including tools and components for PDF, barcodes, spreadsheets, screen video recording. It can sign pdf and set security with pdf sdk in C#.

This prolific sample source code in C# for ByteScout Premium Suite contains various functions and other necessary options you should do calling the API to sign pdf and set security with pdf sdk. Just copy and paste the code into your C# application’s code and follow the instructions. This basic programming language sample code for C# will do the whole work for you to sign pdf and set security with pdf sdk.

Trial version of ByteScout Premium Suite is available for free. Source code samples are included to help you with your C# app.

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Program.cs

      using System.Diagnostics;
using System.Drawing;
using Bytescout.PDF;
using Font = Bytescout.PDF.Font;
using SolidBrush = Bytescout.PDF.SolidBrush;
using StringFormat = Bytescout.PDF.StringFormat;

namespace Signing
{
    /// <summary>
    /// This example demonstrates how to digitally sign PDF document.
    /// </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);

            // Add sample page content
            SolidBrush brush = new SolidBrush();
            Font font = new Font("Arial", 16);
            RectangleF rect = new RectangleF(0, 50, page.Width, 100);
            StringFormat stringFormat = new StringFormat();
            stringFormat.HorizontalAlign = HorizontalAlign.Center;
            page.Canvas.DrawString("Signature Test", font, brush, rect, stringFormat);

            // Signing parameters
            string certficateFile = ".\\demo_certificate.pfx";
            string certficatePassword = "123";
            // Optional parameters
            string signingReason = "Approval";
            string contactName = "John Smith";
            string location = "Corporate HQ";
            
            // Invisible signature
            //pdfDocument.Sign(certficateFile, certficatePassword);
            
            // Visible signature
            RectangleF signatureRect = new RectangleF(400, 50, 150, 100);
            pdfDocument.Sign(certficateFile, certficatePassword, signatureRect, signingReason, contactName, location);

            // 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);
        }
    }
}