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using Gma.QrCodeNet.Encoding; |
在控制臺(tái)中輸出二維碼：
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(); |
此代碼將產(chǎn)生以下輸出：
在Graphics上繪制二維碼：
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); } |
在WriteableBitmap上繪制二維碼：
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. |
如果需要把二維碼呈現(xiàn)在WinForm或者WPF應(yīng)用程序中，可以直接把類庫拖入工具箱，然后直接在窗體上拖出控件。
直接把二維碼保存到文件：
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); |
將二維碼寫入Stream：
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); |
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