using System;

using System.IO;

using ZXing.QrCode;

using System.Drawing;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("QR Code Generator\n-----------------");

        string qrText = "Hello World";

        Byte[] byteArray;

        var width = 250; // width of the Qr Code

        var height = 250; // height of the Qr Code

        var margin = 0;

        var qrCodeWriter = new ZXing.BarcodeWriterPixelData

        {

            Format = ZXing.BarcodeFormat.QR_CODE,

            Options = new QrCodeEncodingOptions

            {

                Height = height,

                Width = width,

                Margin = margin

            }

        };

        var pixelData = qrCodeWriter.Write(qrText);

​

        // creating a bitmap from the raw pixel data; if only black and white colors are used it makes no difference

        // that the pixel data ist BGRA oriented and the bitmap is initialized with RGB

        using (var bitmap = new System.Drawing.Bitmap(pixelData.Width, pixelData.Height, System.Drawing.Imaging.PixelFormat.Format32bppRgb))

        {

            using (var ms = new MemoryStream())

            {

                var bitmapData = bitmap.LockBits(new System.Drawing.Rectangle(0, 0, pixelData.Width, pixelData.Height), System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppRgb);

                try

                {

                    // we assume that the row stride of the bitmap is aligned to 4 byte multiplied by the width of the image

                    System.Runtime.InteropServices.Marshal.Copy(pixelData.Pixels, 0, bitmapData.Scan0, pixelData.Pixels.Length);

                }

                finally

                {

                    bitmap.UnlockBits(bitmapData);

                }

​

                // save to folder

                string fileGuid = Guid.NewGuid().ToString().Substring(0, 4);

                //bitmap.Save(Server.MapPath("~/qrr") + "/file-" + fileGuid + ".png", System.Drawing.Imaging.ImageFormat.Png);

                bitmap.Save("QRTest.png");

                // save to stream as PNG

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

                byteArray = ms.ToArray();

            }

        }

    }

}