C#利用QrCode.Net生成二维码（Qr码

using Gma.QrCodeNet.Encoding;

Console.Write(@"Type some text to QR code: ");

string sampleText = Console.ReadLine();

QrEncoder qrEncoder = new QrEncoder(ErrorCorrectionLevel.M);

QrCode qrCode = qrEncoder.Encode(sampleText);

for (int j = 0; j < qrCode.Matrix.Width; j++)

{

    for (int i = 0; i < qrCode.Matrix.Width; i++)

    {

        char charToPrint = qrCode.Matrix[i, j] ? ‘█‘ : ‘ ‘;

        Console.Write(charToPrint);

    }

    Console.WriteLine();

}

Console.WriteLine(@"Press any key to quit.");

Console.ReadKey();

const string helloWorld = "Hello World!";

     QrEncoder qrEncoder = new QrEncoder(ErrorCorrectionLevel.H);

     QrCode qrCode = qrEncoder.Encode(helloWorld);

     const int moduleSizeInPixels = 5;

     Renderer renderer = new Renderer(moduleSizeInPixels, Brushes.Black, Brushes.White);

     Panel panel = new Panel();

     Point padding =  new Point(10,16);

     Size qrCodeSize = renderer.Measure(qrCode.Matrix.Width);

     panel.AutoSize = false;

     panel.Size = qrCodeSize + new Size(2 * padding.X, 2 * padding.Y);

     using (Graphics graphics = panel.CreateGraphics())

     {

         renderer.Draw(graphics, qrCode.Matrix, padding);

     }

const string helloWorld = "Hello World!";

QrEncoder qrEncoder = new QrEncoder(ErrorCorrectionLevel.H);

QrCode qrCode = new QrCode();

qrEncoder.TryEncode(helloWorld, out qrCode);

const int moduleSizeInPixels = 5;

Renderer renderer = new Renderer(moduleSizeInPixels);   //Black&White is default colour for drawing QrCode

//Matrix under qrCode might be null if input string is null or empty. 21 module wide is version 1 QrCode‘s width.

int pixelSize = qrCode.Matrix == null ? renderer.Measure(21) : renderer.Measure(qrCode.Matrix.Width);

WriteableBitmap wBitmap = new WriteableBitmap(pixelSize, pixelSize, 96, 96, PixelFormats.Gray8, null);

//If wBitmap is null value. renderer will create Gray8 Bitmap as default.

renderer.Draw(wBitmap, qrCode.Matrix);    //Default offset position is (0, 0);

//Now you can put wBitmap to Image control‘s Source or use it to create image file.

QrEncoder qrEncoder = new QrEncoder(ErrorCorrectionLevel.H);

QrCode qrCode = new QrCode();

qrEncoder.TryEncode(helloWorld, out qrCode);

Renderer renderer = new Renderer(5, Brushes.Black, Brushes.White);

renderer.CreateImageFile(qrCode.Matrix, @"c:\temp\HelloWorld.png", ImageFormat.Png);

QrEncoder qrEncoder = new QrEncoder(ErrorCorrectionLevel.H);

QrCode qrCode = new QrCode();

qrEncoder.TryEncode(helloWorld, out qrCode);

Renderer renderer = new Renderer(5, Brushes.Black, Brushes.White);

MemoryStream ms = new MemoryStream();

renderer.WriteToStream(qrCode.Matrix, ms, ImageFormat.png);