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：

随手记一次利用开源zxing生成带嵌入logo的二维码图片的相关教程结束。