如何用.NET生成二维码

发布网友发布时间：2022-05-02 02:40

共1个回答

热心网友时间：2022-04-26 03:12

引用 ThoughtWorks.QRCode.dll 来生成二维码的

//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;
        }
        有详细的代码，直接使用
        http://www.cnblogs.com/jys509/p/4592539.html