此文件是在MVC中使用ThoughtWorks.QRCode生成网页版二维码需下载dll文件，可带Logo标志 下载地址
项目中需引用此dll文件，而文件中需导入
using ThoughtWorks.QRCode.Codec; using ThoughtWorks.QRCode.Codec.Data; using ThoughtWorks.QRCode.Codec.Util; using System.Drawing.Drawing2D; using System.Drawing; using System.Text;
//生成二维码方法一
//传入要生成二维码的字符串nr private void CreateCode_Simple(string nr) { //创建二维码生成类 QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(); //设置编码模式 qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE; //设置编码测量度最大40 qrCodeEncoder.QRCodeScale = 4; //设置编码版本 qrCodeEncoder.QRCodeVersion = 8; //设置编码错误纠正 qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M; //System.Drawing.Image image = qrCodeEncoder.Encode("330326 浙江"); //根据字符串生成二维码图片System.Text.Encoding.UTF8方式编码支持中文 System.Drawing.Image image = qrCodeEncoder.Encode(nr, System.Text.Encoding.UTF8); //图片文件命名以日期时间格式或用Guid(string guid = Guid.NewGuid().ToString().Replace("-", "") + ".png";) string filename = DateTime.Now.ToString("yyyymmddhhmmssfff").ToString() + ".jpg"; //保存路径及文件名 string filepath = Server.MapPath(@"~\Upload") + "\\" + filename;
//从数据流中读取数据 System.IO.FileStream fs = new System.IO.FileStream(filepath, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write); //保存路径及文件名大图小图组合成一张图 CombinImage(image,Server.MapPath("~/images/3.jpg")).Save(fs, System.Drawing.Imaging.ImageFormat.Jpeg); fs.Close(); image.Dispose(); //二维码解码 var codeDecoder = CodeDecoder(filepath); }
/// <summary> /// 调用此函数后使此两种图片合并，类似相册，有个 /// 背景图，中间贴自己的目标图片 /// </summary> /// <param name="imgBack">粘贴的源图片大图</param> /// <param name="destImg">粘贴的目标图片小图</param> public static Image CombinImage(Image imgBack, string destImg) { Image img = Image.FromFile(destImg); //Logo图片 //logo占二维码图片尺寸为30%比例 img = KiResizeImage(img, imgBack.Width * 3 / 10, imgBack.Height * 3 / 10, 0); Graphics g = Graphics.FromImage(imgBack); g.DrawImage(imgBack, 0, 0, imgBack.Width, imgBack.Height); //g.DrawImage(imgBack, 0, 0, 相框宽, 相框高); //g.FillRectangle(System.Drawing.Brushes.White, imgBack.Width / 2 - img.Width / 2 - 1, imgBack.Width / 2 - img.Width / 2 - 1,1,1);//相片四周刷一层黑色边框 //g.DrawImage(img, 照片与相框的左边距, 照片与相框的上边距, 照片宽, 照片高); g.DrawImage(img, imgBack.Width / 2 - img.Width / 2, imgBack.Width / 2 - img.Width / 2, img.Width, img.Height); GC.Collect(); return imgBack; }
/// <summary> /// Resize图片 /// </summary> /// <param name="bmp">原始Bitmap</param> /// <param name="newW">新的宽度</param> /// <param name="newH">新的高度</param> /// <param name="Mode">保留着，暂时未用</param> /// <returns>处理以后的图片</returns> public static Image KiResizeImage(Image bmp, int newW, int newH, int Mode) { try { Image b = new Bitmap(newW, newH); Graphics g = Graphics.FromImage(b); // 插值算法的质量 g.InterpolationMode = InterpolationMode.HighQualityBicubic; g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel); g.Dispose(); return b; } catch { return null; } }
/// <summary> /// 生成二维码 /// </summary> /// <param name="strData">要生成的文字或者数字，支持中文。如： "330326 浙江 或者：111111"</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, System.Text.Encoding.UTF8); 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); CombinImage(image, Server.MapPath("~/images/3.jpg")).Save(fs, System.Drawing.Imaging.ImageFormat.Jpeg); fs.Close(); image.Dispose(); return Content(@"/Upload/" + filename); }
/// <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; }