一.使用C#生成二维码类库之一是qrcodenet
源代码地址:
http://qrcodenet.codeplex.com/
二.使用实例
定义处理字符串
static string url = "http://blog.csdn.net/u011127019";
1.实例1
//生成二维码 static void Generate1() { //创建二维码生成类 QrEncoder qrEncoder = new QrEncoder(ErrorCorrectionLevel.M); QrCode qrCode = qrEncoder.Encode(url); //输出显示在控制台 for (int j = 0; j < qrCode.Matrix.Height; j++) { for (int i = 0; i < qrCode.Matrix.Width; i++) { char charToPoint = qrCode.Matrix[i, j] ? '█' : ' '; Console.Write(charToPoint); } Console.WriteLine(); } }
2.生成二维码,保存成图片
//生成图片 static void Generate2() { QrEncoder qrEncoder = new QrEncoder(ErrorCorrectionLevel.M); QrCode qrCode = qrEncoder.Encode(url); //保存成png文件 string filename = @"H:桌面截图url.png"; GraphicsRenderer render = new GraphicsRenderer(new FixedModuleSize(5, QuietZoneModules.Two), Brushes.Black, Brushes.White); using (FileStream stream = new FileStream(filename, FileMode.Create)) { render.WriteToStream(qrCode.Matrix, ImageFormat.Png, stream); } }
3.支持中文
//生成中文二维码 static void Generate3() { QrEncoder qrEncoder = new QrEncoder(ErrorCorrectionLevel.M); QrCode qrCode = qrEncoder.Encode("我是小天马"); //保存成png文件 string filename = @"H:桌面截图cn.png"; GraphicsRenderer render = new GraphicsRenderer(new FixedModuleSize(5, QuietZoneModules.Two), Brushes.Black, Brushes.White); Bitmap map = new Bitmap(500, 500); Graphics g = Graphics.FromImage(map); g.FillRectangle(Brushes.Red, 0, 0, 500, 500); render.Draw(g, qrCode.Matrix, new Point(20, 20)); map.Save(filename, ImageFormat.Png); }
4.调整二维码大小
//设置二维码大小 static void Generate4() { QrEncoder qrEncoder = new QrEncoder(ErrorCorrectionLevel.M); QrCode qrCode = qrEncoder.Encode("我是小天马"); //保存成png文件 string filename = @"H:桌面截图size.png"; //ModuleSize 设置图片大小 //QuietZoneModules 设置周边padding /* * 5----150*150 padding:5 * 10----300*300 padding:10 */ GraphicsRenderer render = new GraphicsRenderer(new FixedModuleSize(10, QuietZoneModules.Two), Brushes.Black, Brushes.White); Point padding = new Point(10, 10); DrawingSize dSize = render.SizeCalculator.GetSize(qrCode.Matrix.Width); Bitmap map = new Bitmap(dSize.CodeWidth + padding.X, dSize.CodeWidth + padding.Y); Graphics g = Graphics.FromImage(map); render.Draw(g, qrCode.Matrix, padding); map.Save(filename, ImageFormat.Png); }
5.生成带Logo的二维码
//生成带Logo的二维码 static void Generate5() { QrEncoder qrEncoder = new QrEncoder(ErrorCorrectionLevel.M); QrCode qrCode = qrEncoder.Encode("我是小天马"); //保存成png文件 string filename = @"H:桌面截图logo.png"; GraphicsRenderer render = new GraphicsRenderer(new FixedModuleSize(5, QuietZoneModules.Two), Brushes.Black, Brushes.White); DrawingSize dSize = render.SizeCalculator.GetSize(qrCode.Matrix.Width); Bitmap map = new Bitmap(dSize.CodeWidth, dSize.CodeWidth); Graphics g = Graphics.FromImage(map); render.Draw(g, qrCode.Matrix); //追加Logo图片 ,注意控制Logo图片大小和二维码大小的比例 Image img = Image.FromFile(@"F:JavaScript_SolutionQrCodeQrCodeImages101.jpg"); Point imgPoint = new Point((map.Width - img.Width) / 2, (map.Height - img.Height) / 2); g.DrawImage(img, imgPoint.X, imgPoint.Y, img.Width, img.Height); map.Save(filename, ImageFormat.Png); }
![](https://images2015.cnblogs.com/blog/470800/201604/470800-20160423213403038-119636388.png)