引用ThoughtWorks.QRCode.dll （源代码里有）

1、简单二维码生成及解码代码：

//生成二维码方法一        private void CreateCode_Simple(string nr) { QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(); qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE; qrCodeEncoder.QRCodeScale = 4; qrCodeEncoder.QRCodeVersion = 8; qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M; //System.Drawing.Image image = qrCodeEncoder.Encode("4408810820 深圳－广州 小江"); System.Drawing.Image image = qrCodeEncoder.Encode(nr); string filename = DateTime.Now.ToString("yyyymmddhhmmssfff").ToString() + ".jpg"; string filepath = Server.MapPath(@"~\Upload") + "\\" + filename; System.IO.FileStream fs = new System.IO.FileStream(filepath, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write); image.Save(fs, System.Drawing.Imaging.ImageFormat.Jpeg); fs.Close(); image.Dispose(); //二维码解码 var codeDecoder = CodeDecoder(filepath); } /// 
 /// 二维码解码 /// 
 /// 图片路径 /// 
      public string CodeDecoder(string filePath) { if (!System.IO.File.Exists(filePath)) return null; Bitmap myBitmap = new Bitmap(Image.FromFile(filePath)); QRCodeDecoder decoder = new QRCodeDecoder(); string decodedString = decoder.decode(new QRCodeBitmapImage(myBitmap)); return decodedString; }

2、源代码演示，相对复杂的生成方式：

界面效果：

前端代码：

@{    Layout = null;}    
           
     
 
      
要生成的文字(支持中文)：
 
      
 Encoding: Byte AlphaNumeric Numeric  
 
      
 Correction Level: M L Q H  
 
      
Version:
 
      
scale:
 
       
       
     
  

后台：

/// 生成二维码        ///         /// 要生成的文字或者数字，支持中文。如： "4408810820 深圳－广州" 或者：4444444444 /// 三种尺寸：BYTE ，ALPHA_NUMERIC，NUMERIC /// 大小：L M Q H /// 版本：如 8 /// 比例：如 4 /// 
      public ActionResult CreateCode_Choose(string strData, string qrEncoding, string level, int version, int scale) { QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(); string encoding = qrEncoding; switch (encoding) { case "Byte": qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE; break; case "AlphaNumeric": qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.ALPHA_NUMERIC; break; case "Numeric": qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.NUMERIC; break; default: qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE; break; } qrCodeEncoder.QRCodeScale = scale; qrCodeEncoder.QRCodeVersion = version; switch (level) { case "L": qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L; break; case "M": qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M; break; case "Q": qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.Q; break; default: qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.H; break; } //文字生成图片 Image image = qrCodeEncoder.Encode(strData); string filename = DateTime.Now.ToString("yyyymmddhhmmssfff").ToString() + ".jpg"; string filepath = Server.MapPath(@"~\Upload") + "\\" + filename; //如果文件夹不存在，则创建 //if (!Directory.Exists(filepath)) // Directory.CreateDirectory(filepath); System.IO.FileStream fs = new System.IO.FileStream(filepath, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write); image.Save(fs, System.Drawing.Imaging.ImageFormat.Jpeg); fs.Close(); image.Dispose(); return Content(@"/Upload/" + filename); }

源代码演示下载：