using System;

using System.Drawing;

using System.Drawing.Imaging;

using System.IO;

using System.Web.Mvc;

using System.Collections.Generic;

using QRCoder;

​

namespace HelloWorldMvcApp

{

    public class HomeController : Controller

    {

        [HttpGet]

        public ActionResult Index()

        {

            var model = new SampleViewModel{ImageBytes = GetQrBytes()

        };

        return      View(model);

    }

    private Bitmap GetQrBitmap(){

        QRCodeGenerator qrGenerator = new QRCodeGenerator();

        QRCodeData qrCodeData = qrGenerator.CreateQrCode("asdf", QRCodeGenerator.ECCLevel.Q);

        QRCode qrCode = new QRCode(qrCodeData);

        return qrCode.GetGraphic(20);

    }

​

    private byte[] GetQrBytes()

    {

        QRCodeGenerator qrGenerator = new QRCodeGenerator();

        QRCodeData qrCodeData = qrGenerator.CreateQrCode("asdf", QRCodeGenerator.ECCLevel.Q);

        QRCode qrCode = new QRCode(qrCodeData);

        //System.Web.UI.WebControls.Image imgBarCode = new System.Web.UI.WebControls.Image();

        //imgBarCode.Height = 150;

        //imgBarCode.Width = 150;

        using (Bitmap bitMap = qrCode.GetGraphic(20))

        {

            using (MemoryStream ms = new MemoryStream())

            {

                bitMap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);

                return ms.ToArray();

            }

        }

    }

​

    [HttpGet]

    public ActionResult Image()

    {

        //Create new image

        Image img = new Bitmap(100, 50);

        Graphics g = Graphics.FromImage(img);

        //Do some drawing

        Font font = new Font("Arial", 24);

        PointF drawingPoint = new PointF(10, 10);

        g.DrawString("asdf", font, Brushes.Black, drawingPoint);

        //Return Image

        MemoryStream ms = new MemoryStream();

        img.Save(ms, ImageFormat.Png);

        ms.Position = 0;

        return new FileStreamResult(ms, "image/png");

        // end of dummy

        QRCodeGenerator qrGenerator = new QRCodeGenerator();

        QRCodeData qrCodeData = qrGenerator.CreateQrCode("https://www.online.ch", QRCodeGenerator.ECCLevel.Q);

        QRCode qrCode = new QRCode(qrCodeData);

        var bitmap = qrCode.GetGraphic(20);

        var bitmapBytes = BitmapToBytes(bitmap); //Convert bitmap into a byte array

        return File(bitmapBytes, "image/png"); //Return as file result

    }

​

    private static byte[] BitmapToBytes(Bitmap img)

    {

        using (MemoryStream stream = new MemoryStream())

        {

            img.Save(stream, ImageFormat.Png);

            return stream.ToArray();

        }

    }

} }

​