public async Task <IActionResult> GroupingSearch(DateTime?minDate, DateTime?maxDate)
        {
            if (!minDate.HasValue)
            {
                //minDate = new DateTime(DateTime.Now.Year, 1, 1);
                minDate = _salesRecordService.FindEarliestDate();
            }
            if (!maxDate.HasValue)
            {
                //maxDate = DateTime.Now;
                maxDate = _salesRecordService.FindOldestDate();
            }
            ViewData["minDate"] = minDate.Value.ToString("yyyy-MM-dd");
            ViewData["maxDate"] = maxDate.Value.ToString("yyyy-MM-dd");
            var result = await _salesRecordService.FindByDateGroupingAsync(minDate, maxDate);

            return(View(result));
        }