ByteScout PDF SDK – C# – Load Existing PDF Document

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ByteScout PDF SDK – C# – Load Existing PDF Document

printable version:
ByteScout-PDF-SDK-C-sharp-Load-Existing-PDF-Document.pdf

How to load existing PDF document in C# and ByteScout PDF SDK

Write code in C# to load existing PDF document with this step-by-step tutorial

Load existing PDF document is easy to implement in C# if you use these source codes below. ByteScout PDF SDK: the component to help programmers in generating new pdf files, modifying and updating existing pdf documents or pdf forms. Provides support for auto-filling pdf forms, adding text with adjustable font, style, size, font family, new form fields, vector and raster drawings. It can load existing PDF document in C#.

The SDK samples like this one below explain how to quickly make your application do load existing PDF document in C# with the help of ByteScout PDF SDK. This C# sample code is all you need for your app. Just copy and paste the code, add references (if needs to) and you are all set! Use of ByteScout PDF SDK in C# is also explained in the documentation included along with the product.

Trial version of ByteScout PDF SDK 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 Bytescout.PDF;

namespace LoadDocument
{
    /// <summary>
    /// This example demonstrates how to load and modify an existing document.
    /// </summary>
    class Program
    {
        static void Main()
        {
            // Create new Document object
            Document pdfDocument = new Document();
            pdfDocument.RegistrationName = "demo";
            pdfDocument.RegistrationKey = "demo";
            
            // Load existing document
            pdfDocument.Load("sample.pdf");
            
            // Add new page to loaded document
            Page page = new Page(PaperFormat.A4);
            Font font = new Font(StandardFonts.Times, 24);
            Brush brush = new SolidBrush();
            page.Canvas.DrawString("New Page", font, brush, 20, 20);
            pdfDocument.Pages.Add(page);
            
            // 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);
        }
    }
}