public JsonResult CallbackHandler(string olapcallbackarg, string data, IFormFile file)
        {
            var olapAnalysis = new OlapTagHelper(_httpContextAccessor, _hosting);

            if (!string.IsNullOrEmpty(olapcallbackarg))
            {
                return(Json(olapAnalysis.DoCallback(olapcallbackarg, data)));
            }

            if (file != null)
            {
                return(Json(olapAnalysis.LoadSettings(file)));
            }

            return(null);
        }
        public IActionResult ExportHandler(string olapexportarg)
        {
            var olapAnalysis = new OlapTagHelper(_httpContextAccessor, _hosting);

            return(olapAnalysis.DoExport(olapexportarg));
        }