.NET 二維碼生成（ThoughtWorks.QRCode）

時間 2019-11-11

標籤二維生成 thoughtworks.qrcode thoughtworks qrcode 欄目二維碼简体版

原文原文鏈接

引用ThoughtWorks.QRCode.dll （源代碼裏有）javascript

一、簡單二維碼生成及解碼代碼：

        //生成二維碼方法一
        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－廣州 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();
            //二維碼解碼
            var codeDecoder = CodeDecoder(filepath);
        }

        /// <summary>
        /// 二維碼解碼
        /// </summary>
        /// <param name="filePath">圖片路徑</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;
        }

二、源代碼演示，相對複雜的生成方式：

界面效果：html

前端代碼：前端

@{
    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 測試" /></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>

後臺：java

        /// 生成二維碼
        /// </summary>
        /// <param name="strData">要生成的文字或者數字，支持中文。如： "4408810820 深圳－廣州" 或者：4444444444</param>
        /// <param name="qrEncoding">三種尺寸：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;
            }
            //文字生成圖片
            Image image = qrCodeEncoder.Encode(strData);
            string filename = DateTime.Now.ToString("yyyymmddhhmmssfff").ToString() + ".jpg";
            string filepath = Server.MapPath(@"~\Upload") + "\\" + filename;
            //若是文件夾不存在，則建立
            //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);
        }

源代碼演示下載：點擊下載jquery

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