public ActionResult Index(string theValue)
        {
            var base64ImageBytes = "";

            try
            {
                bool addChecksum = false;
                // generate QR Code barcode
                base64ImageBytes = GeneratorHelper.GetBase64Barcode(theValue, SymbologyType.QRCode, addChecksum);
            }
            catch (Exception e)
            {
                ViewBag.Error = e.Message;
                return(View());
            }

            var str = string.Format("<img src=\"data:image/png;base64,{0}\">", base64ImageBytes);

            ViewBag.Image = str;

            return(View());
        }