// GET: Home
        public ActionResult Index()
        {
            QRCodeEncoder endocder = new QRCodeEncoder();
            //二维码背景颜色
            endocder.QRCodeBackgroundColor = System.Drawing.Color.White;
            //二维码编码方式
            endocder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
            //每个小方格的宽度
            endocder.QRCodeScale = 10;
            //二维码版本号
            endocder.QRCodeVersion = 5;
            //纠错等级
            endocder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
            var person = new { Id = 1, Name = "wolfy", Gender = 1, Age = 24 };
            //将json川做成二维码
            Bitmap bitmap = endocder.Encode(new JavaScriptSerializer().Serialize(person), System.Text.Encoding.UTF8);
            string strSaveDir = Request.MapPath("/QRcode/");
            if (!Directory.Exists(strSaveDir))
            {
                Directory.CreateDirectory(strSaveDir);
            }
            string strSavePath = Path.Combine(strSaveDir, person.Name + ".png");
            if (!System.IO.File.Exists(strSavePath))
            {
                bitmap.Save(strSavePath);
            }
            ViewBag.img = "/QRcode/" + person.Name + ".png";
            return View();
        }

        public string DeCoder()
        {
            string result = "";
            string strSaveDir = Request.MapPath("/QRcode/");
            if (!Directory.Exists(strSaveDir))
            {
                Directory.CreateDirectory(strSaveDir);
            }
            string strSavePath = Path.Combine(strSaveDir, "wolfy.png");
            if (System.IO.File.Exists(strSavePath))
            {
                QRCodeDecoder decoder = new QRCodeDecoder();
                result = decoder.decode(new ThoughtWorks.QRCode.Codec.Data.QRCodeBitmapImage(new Bitmap(Image.FromFile(strSavePath))));
            }

            return result;
        }