项目引用引用ThoughtWorks.QRCode.dll 类

新建类QrCodeHelper

引用

using ThoughtWorks.QRCode.Codec;

using System.Drawing;

using System.Drawing.Imaging;

using System.IO;

创建生成二维码的方法CreateEQcoder

1 /// 
 2         /// 生成二维码 3         /// 
 4         /// 尺寸4-15 5         /// 复杂级别3-12 6         /// 容错量"H","L","M","Q" 7         /// 二维码信息 8         /// 用户ID（唯一标识） 9         /// 
     10         public static string CreateEQcoder(int qrCodeScale, int qrCodeVersion, string qrCodeErrorCorrect, string url, string uId)11         {12             QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();13             qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;14             qrCodeEncoder.QRCodeScale = qrCodeScale;15             qrCodeEncoder.QRCodeVersion = qrCodeVersion;16             switch (qrCodeErrorCorrect)17             {18                 case "H":19                     qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.H;20                     break;21                 case "L":22                     qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L;23                     break;24                 case "M":25                     qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;26                     break;27                 case "Q":28                     qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.Q;29                     break;30             }31             qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L;32             Bitmap bmPhoto = qrCodeEncoder.Encode(url, System.Text.Encoding.GetEncoding("UTF-8"));33             string fileName = DateTime.Now.ToString("yyyy") + ".jpg";34             string savePath = "/Tempuploads/" + uId + "/QRCode/";35 36             string dirPath = System.Web.HttpContext.Current.Server.MapPath(savePath);37 38             try39             {40                 if (!Directory.Exists(dirPath))41                 {42                     Directory.CreateDirectory(dirPath);43                 }44                 bmPhoto.Save(System.Web.HttpContext.Current.Server.MapPath("/") + savePath + fileName, ImageFormat.Jpeg);45                 bmPhoto.Dispose();46                 return savePath + fileName;47             }48             catch (Exception)49             {50                 return "";51             }52             finally53             {54                 bmPhoto.Dispose();55             }56         }

解析二维码

QRCodeDecoder decoder = new QRCodeDecoder();   String decodedString = decoder.decode(new QRCodeBitmapImage(new Bitmap(bmPhoto)));   string Text = decodedString;