//ham lay danh sach transaction theo ngay public async Task <JsonResult> GetTransactionByDate(string Start, string End) { return(await Task.Run <JsonResult>(() => { DateTime start = DateTime.ParseExact(Start + " 00:00", "MM/dd/yyyy HH:mm", CultureInfo.InvariantCulture); DateTime end = DateTime.ParseExact(End + " 23:59", "MM/dd/yyyy HH:mm", CultureInfo.InvariantCulture); List <VT_GetTransactionByDate_Result> data = db.VT_GetTransactionByDate(start, end).ToList(); return Json(new { data }, JsonRequestBehavior.AllowGet); })); }