需求：项目要求要生成微信用户关注注册我们的公众号的时候生成一个二维码

        private Bitmap GetDimensionalCode(string link)
        {

            Bitmap bmp = null;

            try
            {

                QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();

                qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;

                //大小
                qrCodeEncoder.QRCodeScale = 7;

                //复杂程度
                qrCodeEncoder.QRCodeVersion = 2;

                //错误修正度
                qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;

                bmp = qrCodeEncoder.Encode(link, Encoding.UTF8);

            }

            catch (Exception ex)
            {

                MessageBox.Show("系统故障 ! \r\n" + ex.Message);

            }

            return bmp;

        }