来源: .NET 二维码生成(ThoughtWorks.QRCode) – jiangys – 博客园
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/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 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="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>
后台:
/// 生成二维码 /// </summary> /// <param name="strData">要生成的文字或者数字,支持中文。如: "4408810820 深圳-广州" 或者:4444444444</param> /// <param name="qrEncoding">三种尺寸: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; } //文字生成图片 Image image = qrCodeEncoder.Encode(strData); string filename = DateTime.Now.ToString("yyyymmddhhmmssfff").ToString() + ".jpg"; string filepath = Server.MapPath(@"~\Upload") + "\\" + filename; //如果文件夹不存在,则创建 //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); }
ThoughtWorks.QRCode.Codec.QRCodeEncoder encoder = new QRCodeEncoder();
encoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;//编码方式(注意:BYTE能支持中文,ALPHA_NUMERIC扫描出来的都是数字)
encoder.QRCodeScale = 4;//大小(值越大生成的二维码图片像素越高)
encoder.QRCodeVersion = 0;//版本(注意:设置为0主要是防止编码的字符串太长时发生错误)
encoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;//错误效验、错误更正(有4个等级)
String qrdata = “二维码信息”;
System.Drawing.Bitmap bp = encoder.Encode(qrdata.ToString(), Encoding.GetEncoding(“GB2312”));
Image image = bp;
pictureBox1.Image = bp;
保存二维码图片:
SaveFileDialog sf = new SaveFileDialog();
sf.Title = “选择保存文件位置”;
sf.Filter = “保存图片(*.jpg) |*.jpg|所有文件(*.*) |*.*”;
//设置默认文件类型显示顺序
sf.FilterIndex = 1;
//保存对话框是否记忆上次打开的目录
sf.RestoreDirectory = true;
if (sf.ShowDialog() == DialogResult.OK)
{
Image im = this.pictureBox1.Image;
//获得文件路径
string localFilePath = sf.FileName.ToString();
if (sf.FileName != “”)
{
string fileNameExt = localFilePath.Substring(localFilePath.LastIndexOf(“\\”) + 1);//获取文件名,不带路径
// newFileName = fileNameExt+DateTime.Now.ToString(“yyyyMMdd”) ;//给文件名后加上时间
string FilePath = localFilePath.Substring(0, localFilePath.LastIndexOf(“.”)); //获取文件路径,带文件名,不带后缀
string fn = sf.FileName;
pictureBox1.Image.Save(FilePath +”-“+ DateTime.Now.ToString(“yyyyMMdd”) + “.jpg”);
}
}
//解析二维码信息
// QRCodeDecoder decoder = new QRCodeDecoder();
// String decodedString = decoder.decode(new QRCodeBitmapImage(new Bitmap(pictureBox1.Image)));
//this.label3.Text = decodedString;