private void dtFrom_ValueChanged(object sender, EventArgs e) { var rec = new Transfer(); dtFrom.CustomFormat = "MM/dd/yyyy"; dtTo.CustomFormat = "MM/dd/yyyy"; DateTime dteFrom = ConvertDate.DateConverter(dtFrom.Text); DateTime dteTo = ConvertDate.DateConverter(dtTo.Text); DataTable dtRec = dteFrom < dteTo ? rec.GetTransactionByDateRange(Convert.ToInt32(lkToStore.EditValue), dteFrom, dteTo) : rec.GetAllTransaction(Convert.ToInt32(lkToStore.EditValue)); gridControl1.DataSource = dtRec; dtFrom.CustomFormat = "MMMM dd, yyyy"; dtTo.CustomFormat = "MMMM dd, yyyy"; }