之前就在项目里面用过zxing生成二维码，最近另一个项目同样需要用到二维码，故重新在学了学利用zxing生成二维码

接下来先做准备工作了，因为我是用vs2013上开发的，故选择了.net4.5版本的zxing.dll.另外准备了一张准备嵌入的图片，代码如下：

1 using System; 2 using System.Collections; 3 using System.Collections.Generic; 4 using System.Drawing; 5 using System.Linq; 6 using System.Web; 7 using ZXing; 8 using ZXing.QrCode.Internal; 9 using ZXing.Common;10 using ZXing.Datamatrix;11 using System.IO;12 using ZXing.Rendering;13 using ZXing.QrCode;14 15 16 namespace UsezxingCreateQRcode.Models17 {18     public class CreateQrCode19     {20         public static byte[] GetQrCodeByZXing(string msg, string logo)21         {22 23             //构造二维码写码器24             QRCodeWriter qrwriter = new QRCodeWriter();25             IDictionary
      
        hints = new Dictionary
       
        ();26             hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");27             hints.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); // 容错级别28             hints.Add(EncodeHintType.MARGIN, 1);//二维码留白边距29             BarcodeWriter bw = new BarcodeWriter();30             BitMatrix bm = qrwriter.encode(msg, BarcodeFormat.QR_CODE, 300, 300, hints);31             Bitmap img = bw.Write(bm);32 //获取logo33             Image logoImage = Image.FromFile(logo);34             //计算插入图片的大小和位置,并计算logo占整个二维码图片的比例35 //根据实际需求可自定义logo所占比例36             int logoImageW = Math.Min((int)(img.Size.Width / 4), logoImage.Width);37             int logoImageH = Math.Min((int)(img.Size.Height / 4), logoImage.Height);38 39             int logoImageX = (img.Width - logoImageW) / 2;40             int logoImageY = (img.Height - logoImageH) / 2;41 42             //将img转换成bmp格式，并创建 Graphics对象43             Bitmap bmpimg = new Bitmap(img.Width, img.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);44             using (Graphics g = Graphics.FromImage(bmpimg))45             {46                 g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;47                 g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;48                 g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;49                 g.DrawImage(img, 0, 0);50             }51 52             //在二维码中插入图片53             System.Drawing.Graphics MyGraphic = System.Drawing.Graphics.FromImage(bmpimg);54             //白底55             MyGraphic.FillRectangle(Brushes.White, logoImageX, logoImageY, logoImageW, logoImageH);56             MyGraphic.DrawImage(logoImage, logoImageX, logoImageY, logoImageW, logoImageH); //嵌入logo57             MemoryStream ms = new MemoryStream();58 bmpimg.Save(ms,System.Drawing.Imaging.ImageFormat.Jpeg);59             byte[] buffur = ms.ToArray();60             ms.Dispose();61             return buffur;62         }63     }64 }
       
      

使用以上方法，举例如下：

1    public ActionResult CreateQrCode()2         {3             string logo = AppDomain.CurrentDomain.BaseDirectory + "Images\\cloud.jpg";4             ViewBag.img = "data:image/Jpeg;base64," + Convert.ToBase64String(UsezxingCreateQRcode.Models.CreateQrCode.GetQrCodeByZXing("NO070133333", logo));5             return View();6         }

........时间不早了，上一个效果图吧：