利用QrCode.Net生成二维码 asp.net mvc c#

港控/mmm° 2022-09-17 10:21 168阅读 0赞

2018.10.30更新：[https://www.nuget.org/packages/QRCoder/][https_www.nuget.org_packages_QRCoder] 大家可以使用这个

/// <summary>
            /// 返回二维码对应的图片（base64编码）
            /// </summary>
            /// <param name="inputText"></param>
            /// <returns></returns>
            public static string GetQRCodeImageAsBase64(string inputText,int pixelsPerModule = 10)
            { 
                QRCodeGenerator qrGenerator = new QRCodeGenerator();
                QRCodeData qrCodeData = qrGenerator.CreateQrCode(inputText, QRCodeGenerator.ECCLevel.Q);
                Base64QRCode qrCode = new Base64QRCode(qrCodeData);
                string qrCodeImageAsBase64 = qrCode.GetGraphic(10);
                return qrCodeImageAsBase64;
            }
            public static Bitmap GetQRCodeImage(string inputText)
            {
                QRCodeGenerator qrGenerator = new QRCodeGenerator();
                QRCodeData qrCodeData = qrGenerator.CreateQrCode(inputText, QRCodeGenerator.ECCLevel.Q);
                QRCode qrCode = new QRCode(qrCodeData);
                Bitmap qrCodeImage = qrCode.GetGraphic(10);
                return qrCodeImage;
            }

自己参考QrCode.Net开源实例封装了一个生成二维码的静态方法如下：

/// <summary>
        /// 含有QR码的描述类和包装编码和渲染
        /// </summary>
        public class QRCodeHelper
        {
            /// <summary>
            /// 获取二维码
            /// </summary>
            /// <param name="strContent">待编码的字符</param>
            /// <param name="ms">输出流</param>
            ///<returns>True if the encoding succeeded, false if the content is empty or too large to fit in a QR code</returns>
            public static bool GetQRCode(string strContent, MemoryStream ms)
            {
                ErrorCorrectionLevel Ecl = ErrorCorrectionLevel.M; //误差校正水平 
                string Content = strContent;//待编码内容
                QuietZoneModules QuietZones = QuietZoneModules.Two;  //空白区域 
                int ModuleSize = 12;//大小
                var encoder = new QrEncoder(Ecl);
                QrCode qr;
                if (encoder.TryEncode(Content, out qr))//对内容进行编码，并保存生成的矩阵
                {
                    var render = new GraphicsRenderer(new FixedModuleSize(ModuleSize, QuietZones));
                    render.WriteToStream(qr.Matrix, ImageFormat.Png, ms);
                }
                else
                {
                    return false;
                } 
                return true;
            } 
    
        }

vs2010  framework3.5  引用的组件是QrCode.Net 0.4 Pre-Release\\Gma.QrCodeNet.Encoding.Net35

public ActionResult Index()
            {
                 
                // Render the QR code as an image
                using (var ms = new MemoryStream())
                {
                    string stringtest="中国inghttp://www.baidu.com/mvc.test?&";
                    QRCodeHelper.GetQRCode(stringtest, ms);
                    Response.ContentType = "image/Png";
                    Response.OutputStream.Write(ms.GetBuffer(), 0, (int)ms.Length); 
                    Response.End();
                }
                 
                return View();
            }

![SouthEast][]

也可以通过js生成相关的qrcode

jQuery.qrcode

[http://larsjung.de/qrcode/][http_larsjung.de_qrcode]   jquery的插件，但是压缩后是21k，支持div，images 和canvas，支持生成时嵌入文字和图片

jquery-qrcode

https://github.com/jeromeetienne/jquery-qrcode ，压缩后4k，支持table和canvas

[https_www.nuget.org_packages_QRCoder]: https://www.nuget.org/packages/QRCoder/
[SouthEast]: /images/20220828/99f1ffe429974ccd8c1bfe047add5ec9.png
[http_larsjung.de_qrcode]: http://larsjung.de/qrcode/