C# 生成二维码

using ThoughtWorks.QRCode.Codec;

 1　　　　　　　　QRCodeEncoder codeEncoder = new QRCodeEncoder();

            Bitmap image = codeEncoder.Encode("二维码链接", Encoding.UTF8);

            string path11 = $"/img/{Guid.NewGuid().ToString("N")}" + ".jpg";
            string physicPath = GetAbsolutePath($"~{path11}");
            string dir = Path.GetDirectoryName(physicPath);
            if (!Directory.Exists(dir))
                Directory.CreateDirectory(dir);
            string newpath = $"{_configuration["WebRootUrl"]}{path11}";
            string ppth = _hostingEnvironment.WebRootPath + path11;

            image.Save(ppth, System.Drawing.Imaging.ImageFormat.Jpeg);

_configuration["WebRootUrl"] ：接口根地址

_hostingEnvironment.WebRootPath:绝对路径

 

 /***********************************************************************************************/

返回byte[] 类型

　　　　　　　 /// <param name="Content">内容文本</param>
            /// <param name="QRCodeEncodeMode">二维码编码方式</param>
            /// <param name="QRCodeErrorCorrect">纠错码等级</param>
            /// <param name="QRCodeVersion">二维码版本号 0-40</param>
            /// <param name="QRCodeScale">每个小方格的预设宽度（像素），正整数</param>
            /// <param name="size">图片尺寸（像素），0表示不设置</param>
            /// <param name="border">图片白边（像素），当size大于0时有效</param>
            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
            qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
            qrCodeEncoder.QRCodeScale = 12;

            qrCodeEncoder.QRCodeVersion = 0;//二维码版本号 0-40
            qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
            String data = "链接";
            System.Drawing.Bitmap image = qrCodeEncoder.Encode(data);
            System.IO.MemoryStream MStream = new System.IO.MemoryStream();
            image.Save(MStream, System.Drawing.Imaging.ImageFormat.Jpeg);

            return MStream.ToArray();