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/java script"> $(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=