using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace MultipleBarcodeGeneration
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}

using System;
using System.IO;
using System.Windows.Forms;
using Bytescout.BarCode;

namespace MultipleBarcodeGeneration
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            foreach (SymbologyType st in Enum.GetValues(typeof(SymbologyType)))
            {
                cmbBarcodeType.Items.Add(st);
            }

            cmbBarcodeType.SelectedIndex = 0;
            cmbImageFormat.SelectedIndex = 0;
        }

        private void btnGenerate_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog folderBrowserDialog = new FolderBrowserDialog();
            folderBrowserDialog.Description = "Select output folder";

            if (folderBrowserDialog.ShowDialog() != DialogResult.OK)
            {
                return;
            }

            string fileNameTemplate = tbFileNameTemplate.Text + "." + Convert.ToString(cmbImageFormat.SelectedItem).ToLower();
            uint counterStartAt = (uint) nudCounterStartAt.Value;
            uint counterStepBy = (uint) nudCounterStepBy.Value;
            uint counterDigits = Convert.ToUInt32(cmbCounterDigits.Text);

            if (!fileNameTemplate.Contains("[N]"))
            {
                MessageBox.Show("File name template does not contain the counter placeholder [N]");
                return;
            }

            string valueTemplate = tbValueTemplate.Text;
            uint valueStartAt = (uint) nudValueStartAt.Value;
            uint valueStepBy = (uint) nudValueStepBy.Value;
            uint valueEndAt = (uint) nudValueEndAt.Value;
            uint valueDigits = Convert.ToUInt32(cmbValueDigits.Text);

            if (!valueTemplate.Contains("[N]"))
            {
                MessageBox.Show("Barcode value template does not contain the counter placeholder [N]");
                return;
            }

            Cursor = Cursors.WaitCursor;
            progressBar.Visible = true;
            btnGenerate.Text = "Stop";

            try
            {
                progressBar.Value = (int) valueStartAt;
                progressBar.Minimum = (int) valueStartAt;
                progressBar.Maximum = (int) valueEndAt;
                progressBar.Step = (int) valueStepBy;

                GenerateBarcodes(valueTemplate, valueStartAt, valueEndAt, valueStepBy, valueDigits, fileNameTemplate, 
                    counterStartAt, counterStepBy, counterDigits, folderBrowserDialog.SelectedPath);
            }
            catch (Exception exception)
            {
                MessageBox.Show(exception.Message);
            }
            finally
            {
                Cursor = Cursors.Default;
                progressBar.Visible = false;
                btnGenerate.Text = "Generate multiple barcodes";
            }
        }

        private void GenerateBarcodes(string valueTemplate, uint valueStartAt, uint valueEndAt, uint valueStepBy, uint valueDigits, 
            string fileNameTemplate, uint counterStartAt, uint counterStepBy, uint counterDigits, string outputFolder)
        {
            Barcode barcode = new Barcode();
            barcode.RegistrationKey = "demo";
            barcode.RegistrationName = "demo";

            barcode.Symbology = (SymbologyType) cmbBarcodeType.SelectedItem;
            // Set up additional barcode properties here.
            //barcode.AdditionalCaption = "...";

            uint c = counterStartAt;

            for (uint i = valueStartAt; i <= valueEndAt; i += valueStepBy)
            {
                string value = String.Format("{0:D" + valueDigits + "}", i);
                string counter = String.Format("{0:D" + counterDigits + "}", c);
                string fileName = fileNameTemplate.Replace("[N]", counter);

                progressBar.PerformStep();

                barcode.Value = valueTemplate.Replace("[N]", value);

                barcode.SaveImage(Path.Combine(outputFolder, fileName));

                c += counterStepBy;

                Application.DoEvents();
            }
        }
    }
}