BarCodePrintSample.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Drawing;
using System.Drawing.Printing;
using System.Windows.Forms;
using BarcodeLib;
using QRCoder;

namespace Sample
{
    class CouponPrinter
    {

        public String PrinterName { get; set; }

        public CouponPrinter(String printerName)
        {
            PrinterName = printerName;
        }

        public void PrintReceiptForTransaction()
        {
            PrintDocument recordDoc = new PrintDocument();

            recordDoc.DocumentName = "Receipt";
            recordDoc.PrintPage += new PrintPageEventHandler(CouponPrinter.PrintReceiptPage); 
            recordDoc.PrintController = new StandardPrintController();
           
            // Comment if debugging 
            PrinterSettings ps = new PrinterSettings();
            
            ps.PrinterName = PrinterName;
            recordDoc.PrinterSettings = ps;
            recordDoc.Print();
            
            // --------------------------------------

            // Uncomment if debugging - shows dialog instead
            
            /*            
            PrintPreviewDialog printPrvDlg = new PrintPreviewDialog();
            printPrvDlg.Document = recordDoc;
            printPrvDlg.Width = 1200;
            printPrvDlg.Height = 800;
            printPrvDlg.ShowDialog();
            */          
            // --------------------------------------

            recordDoc.Dispose();
        }

        private static void PrintReceiptPage(object sender, PrintPageEventArgs e)
        {
            string transactionId = "038000356216";

            float x = 10;
            float y = 5;
            float width = 260.0F; // max width I found through trial and error
            float height = 0F;

            Font drawFontArial12Bold = new Font("Arial", 12, FontStyle.Bold);
            Font drawFontArial10Regular = new Font("Arial", 10, FontStyle.Regular);
            Font drawFontArial7Regular = new Font("Arial", 7, FontStyle.Regular);
            SolidBrush drawBrush = new SolidBrush(Color.Black);

            // Set format of string.
            StringFormat drawFormatCenter = new StringFormat();
            drawFormatCenter.Alignment = StringAlignment.Center;
            StringFormat drawFormatLeft = new StringFormat();
            drawFormatLeft.Alignment = StringAlignment.Near;
            StringFormat drawFormatRight = new StringFormat();
            drawFormatRight.Alignment = StringAlignment.Far;

            // Draw string to screen.
            string text = "Company Name";
            e.Graphics.DrawString(text, drawFontArial12Bold, drawBrush, new RectangleF(x, y, width, height), drawFormatCenter);
            y += e.Graphics.MeasureString(text, drawFontArial12Bold).Height;

            text = "Company Address Address";
            e.Graphics.DrawString(text, drawFontArial10Regular, drawBrush, new RectangleF(x, y, width, height), drawFormatCenter);
            y += e.Graphics.MeasureString(text, drawFontArial10Regular).Height;

            text = "Company URL";
            e.Graphics.DrawString(text, drawFontArial10Regular, drawBrush, new RectangleF(x, y, width, height), drawFormatCenter);
            y += e.Graphics.MeasureString(text, drawFontArial10Regular).Height;

            // Line feed
            y += e.Graphics.MeasureString(text, drawFontArial10Regular).Height;
            
            // Generate Bar Code
            Bitmap barcode = generateBarCode(transactionId);

            float barcodeWidth = x + (width / 2) - (barcode.Width / 2);
            e.Graphics.DrawImage(barcode, new Rectangle((int)barcodeWidth, (int)y, barcode.Width, barcode.Height));
            y += barcode.Height;

            // Print Barcode Number underneath
            text = transactionId;
            e.Graphics.DrawString(text, drawFontArial7Regular, drawBrush, new RectangleF(x, y, width, height), drawFormatCenter);
            y += e.Graphics.MeasureString(text, drawFontArial7Regular).Height;

            Bitmap qrCodeImage = generateQRCode("The text which should be encoded.");

            e.Graphics.DrawImage(qrCodeImage, qrCodeImage.Width, qrCodeImage.Height);
            float qrcodeWidth = x + (width / 2) - (qrCodeImage.Width / 2);
            e.Graphics.DrawImage(qrCodeImage, new Rectangle((int) qrcodeWidth, (int) y, qrCodeImage.Width, qrCodeImage.Height));
            y += qrCodeImage.Height;

            text = "Company Name";
            e.Graphics.DrawString(text, drawFontArial10Regular, drawBrush, new RectangleF(x, y, width, height), drawFormatCenter);
            y += e.Graphics.MeasureString(text, drawFontArial10Regular).Height;

            text = "Company URL";
            e.Graphics.DrawString(text, drawFontArial10Regular, drawBrush, new RectangleF(x, y, width, height), drawFormatCenter);
            y += e.Graphics.MeasureString(text, drawFontArial10Regular).Height;
        }

        private static Bitmap generateQRCode(string url)
        {
            QRCodeGenerator qrGenerator = new QRCodeGenerator();
            QRCodeData qrCodeData = qrGenerator.CreateQrCode(url, QRCodeGenerator.ECCLevel.Q);
            QRCode qrCode = new QRCode(qrCodeData);
            return qrCode.GetGraphic(2);
        }

        private static Bitmap generateBarCode(string code)
        {
            BarcodeLib.Barcode b = new BarcodeLib.Barcode();
            b.Alignment = BarcodeLib.AlignmentPositions.CENTER;
            Image img = b.Encode(BarcodeLib.TYPE.UPCA, code, Color.Black, Color.White, 100, 25);
            return new Bitmap(img);
        }
    }
}