随手记一次利用开源zxing生成带嵌入logo的二维码图片

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：

 using System;
 using System.Collections;
 using System.Collections.Generic;
 using System.Drawing;
 using System.Linq;
 using System.Web;
 using ZXing;
 using ZXing.QrCode.Internal;
 using ZXing.Common;
 using ZXing.Datamatrix;
 using System.IO;
 using ZXing.Rendering;
 using ZXing.QrCode;

 namespace UsezxingCreateQRcode.Models
 {
     public class CreateQrCode
     {
         public static byte[] GetQrCodeByZXing(string msg, string logo)
         {

             //构造二维码写码器
             QRCodeWriter qrwriter = new QRCodeWriter();
             IDictionary<EncodeHintType, object> hints = new Dictionary<EncodeHintType, object>();
             hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
             hints.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); // 容错级别
             hints.Add(EncodeHintType.MARGIN, );//二维码留白边距
             BarcodeWriter bw = new BarcodeWriter();
             BitMatrix bm = qrwriter.encode(msg, BarcodeFormat.QR_CODE, , , hints);
             Bitmap img = bw.Write(bm);
 //获取logo
             Image logoImage = Image.FromFile(logo);
             //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
 //根据实际需求可自定义logo所占比例
             int logoImageW = Math.Min((int)(img.Size.Width / ), logoImage.Width);
             int logoImageH = Math.Min((int)(img.Size.Height / ), logoImage.Height);

             int logoImageX = (img.Width - logoImageW) / ;
             int logoImageY = (img.Height - logoImageH) / ;

             //将img转换成bmp格式，并创建 Graphics对象
             Bitmap bmpimg = new Bitmap(img.Width, img.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
             using (Graphics g = Graphics.FromImage(bmpimg))
             {
                 g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                 g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
                 g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
                 g.DrawImage(img, , );
             }

             //在二维码中插入图片
             System.Drawing.Graphics MyGraphic = System.Drawing.Graphics.FromImage(bmpimg);
             //白底
             MyGraphic.FillRectangle(Brushes.White, logoImageX, logoImageY, logoImageW, logoImageH);
             MyGraphic.DrawImage(logoImage, logoImageX, logoImageY, logoImageW, logoImageH); //嵌入logo
             MemoryStream ms = new MemoryStream();
 bmpimg.Save(ms,System.Drawing.Imaging.ImageFormat.Jpeg);
             byte[] buffur = ms.ToArray();
             ms.Dispose();
             return buffur;
         }
     }
 }

使用以上方法，举例如下：

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

........时间不早了，上一个效果图吧：