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.NET 二维码生成（ThoughtWorks.QRCode）

發(fā)布時(shí)間：2023/12/20 asp.net 29 豆豆

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引用ThoughtWorks.QRCode.dll （源代碼里有）

1、簡(jiǎn)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; }

2、源代碼演示，相對(duì)復(fù)雜的生成方式：

界面效果：

前端代碼：

@{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(cè)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>

后臺(tái)：

/// 生成二維碼/// </summary>/// <param name="strData">要生成的文字或者數(shù)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; //如果文件夾不存在，則創(chuàng)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); }

源代碼演示下載：點(diǎn)擊下載

轉(zhuǎn)載于:https://www.cnblogs.com/hnsongbiao/p/9145293.html

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