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