public FileContentResult ReportCsv(string orderStatus, DateTime?startDate, DateTime?endDate)
{
var orders =
_orderQueryService.OrdersByStatus(orderStatus, startDate, endDate).OrderByDescending(o => o.UpdatedAt);
var report = _orderReportService.Generate(orders);
return(File(report, "text/csv",
string.Format("orders-{0}.csv", DateTime.Now.ToString("yyyyMMdd-HHmmss"))));
}