.NET 二维码生成（ThoughtWorks.QRCode）

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;
}





    "viewport" content="width=device-width" />
    
    
    


    

        
要生成的文字(支持中文)："strData" type="text" value="123456 测试" />
        

            Encoding:<select id="encoding">
                "Byte">Byte
                "AlphaNumeric">AlphaNumeric
                "Numeric">Numeric
            select>

        
        

            Correction Level:<select id="level">
                "M">M
                "L">L
                "Q">Q
                "H">H
            select>
        
        
Version:"version" type="text" value="8" />
        
scale:"scale" type="text" value="4" />
        "" alt="" />
        "createCode" type="button" value="生成" />
    

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：点击下载