using System.Diagnostics;
using Bytescout.PDF;

namespace FileAttachmentAnnotationExample
{
    /// <summary>
    /// This example demonstrates how to attach a file to PDF document.
    /// </summary>
    class Program
    {
        static void Main()
        {
            Document pdfDocument = new Document();
            pdfDocument.RegistrationName = "demo";
            pdfDocument.RegistrationKey = "demo";

            // Load existing document
            pdfDocument.Load(@".\Invoice.pdf");

            // Attach ZUGFeRD XML file
            FileAttachmentAnnotation fileAttachment = new FileAttachmentAnnotation(@".\ZUGFeRD-invoice.xml", 0, 0, 0, 0);
            pdfDocument.Pages[0].Annotations.Add(fileAttachment);

            // Instruct PDF viewer applications to show attachments pane on startup (optional)
            pdfDocument.PageMode = PageMode.Attachment;

            // 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);
        }
    }
}