随手记一次利用开源zxing生成带嵌入logo的二维码图片

 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.Models
17 {
18     public class CreateQrCode
19     {
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<EncodeHintType, object> hints = new Dictionary<EncodeHintType, object>();
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logo
33             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logo
57             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 }

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         }