.NET二维码生成（ThoughtWorks.QRCode）

2019-11-14 15:57:52

字体：大中小

来源：转载

供稿：网友

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);        }        /// <summary>        /// 二维码解码        /// </summary>        /// <param name="filePath">图片路径</param>        /// <returns></returns>        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;}<!DOCTYPE html><html><head>    <meta name="viewport" content="width=device-width" />    <title>Code</title>    <script src="~/Scripts/jquery-1.10.2.js"></script>    <script type="text/javascript">        $(function () {            $("#createCode").click(function () {                var strData = $("#strData").val();                var level = $("#level").val();                var encoding = $("#encoding").val();                var version = $("#version").val();                var scale = $("#scale").val();                $.post("/home/CreateCode_Choose", { strData: strData, level: level, qrEncoding: encoding, version: version, scale: scale }, function (data) {                    $("img").attr("src", data);                });            });        });    </script></head><body>    <div>        <p>要生成的文字(支持中文)：<input id="strData" type="text" value="123456 测试" /></p>        <p>            Encoding:<select id="encoding">                <option value="Byte">Byte</option>                <option value="AlphaNumeric">AlphaNumeric</option>                <option value="Numeric">Numeric</option>            </select>        </p>        <p>            Correction Level:<select id="level">                <option value="M">M</option>                <option value="L">L</option>                <option value="Q">Q</option>                <option value="H">H</option>            </select>        </p>        <p>Version:<input id="version" type="text" value="8" /></p>        <p>scale:<input id="scale" type="text" value="4" /></p>        <img src="" alt="" />        <input id="createCode" type="button" value="生成" />    </div></body></html>

后台：

        /// 生成二维码        /// </summary>        /// <param name="strData">要生成的文字或者数字，支持中文。如： "4408810820 深圳－广州" 或者：4444444444</param>        /// <param name="qrEncoding">三种尺寸：BYTE ，ALPHA_NUMERIC，NUMERIC</param>        /// <param name="level">大小：L M Q H</param>        /// <param name="version">版本：如 8</param>        /// <param name="scale">比例：如 4</param>        /// <returns></returns>        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);        }