二维码生成与解析

        #region 二维码
        int i = 2;
        /// <summary>
        /// 生成二维码
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnProduct_Click(object sender, EventArgs e)
        {
            ThoughtWorks.QRCode.Codec.QRCodeEncoder endocder = new ThoughtWorks.QRCode.Codec.QRCodeEncoder();
            //二维码背景颜色
            endocder.QRCodeBackgroundColor = System.Drawing.Color.White;
            //二维码编码方式
            endocder.QRCodeEncodeMode = ThoughtWorks.QRCode.Codec.QRCodeEncoder.ENCODE_MODE.BYTE;
            //每个小方格的宽度
            endocder.QRCodeScale = 4;
            //二维码版本号
            endocder.QRCodeVersion = 5;//控制版本，不同版本，显示出来的样式不一样
            //纠错等级
            endocder.QRCodeErrorCorrect = ThoughtWorks.QRCode.Codec.QRCodeEncoder.ERROR_CORRECTION.M;
            var person = new { Id = ++i, Name = "wolfy", Gender = 1, Age = 24 + ++i };
            //将json川做成二维码
            using (Bitmap bitmap = endocder.Encode(new JavaScriptSerializer().Serialize(person), System.Text.Encoding.UTF8))
            {
                //Bitmap bitmap = endocder.Encode(new JavaScriptSerializer().Serialize(person), System.Text.Encoding.UTF8);
                var strSavePath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, $"QRCode{i}.jpg");
                strSavePath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, $"QRCode.jpg");
                if (!Directory.Exists(Path.GetDirectoryName(strSavePath)))
                {
                    Directory.CreateDirectory(strSavePath);
                }
                //System.Runtime.InteropServices.ExternalException:
                //     使用错误的图像格式保存图像。 - 或 - 图像已保存到同一文件从创建它。出现一般都是保存路经问题，或者aspnet中是读写文件权限问题
                bitmap.Save(strSavePath, System.Drawing.Imaging.ImageFormat.Jpeg);
                pbxPicture.SizeMode = PictureBoxSizeMode.Zoom;
                //pbxQRCode.Image = Bitmap.FromHbitmap(bitmap.GetHbitmap());
                //第一种绘图
                IntPtr hBitmap = bitmap.GetHbitmap();
                pbxQRCode.Image = Bitmap.FromHbitmap(hBitmap);
                //pbxQRCode.Image.Save(System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, $"QRCode.jpg"), System.Drawing.Imaging.ImageFormat.Jpeg);
                DeleteObject(hBitmap);
                bitmap.Dispose();

                //第二种绘图
                //Graphics graphics = Graphics.FromImage(bitmap);
                //graphics.Clear(Color.White);
                ////再bitmap上绘图
                //graphics.DrawImage(new Bitmap(""), new PointF(0, 0));
                //graphics.Dispose();
            }


            //解密二维码
            //ThoughtWorks.QRCode.Codec.QRCodeDecoder qRCodeDecoder = new ThoughtWorks.QRCode.Codec.QRCodeDecoder();
            //var decoderResult = qRCodeDecoder.decode(new ThoughtWorks.QRCode.Codec.Data.QRCodeBitmapImage(new Bitmap(strSavePath)));

        }

        /// <summary>
        /// 解密二维码
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnConsume_Click(object sender, EventArgs e)
        {
            var strSavePath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, $"QRCode{i}.jpg");
            strSavePath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, $"QRCode.jpg");
            ThoughtWorks.QRCode.Codec.QRCodeDecoder qRCodeDecoder = new ThoughtWorks.QRCode.Codec.QRCodeDecoder();
            var decoderResult = qRCodeDecoder.decode(new ThoughtWorks.QRCode.Codec.Data.QRCodeBitmapImage(new Bitmap(strSavePath)));
            lblTakephotoSavePath.Text = $"二维码：{decoderResult}";
        }
        #endregion