void m_sle_loai_hop_dong_EditValueChanged(object sender, EventArgs e) { try { if(m_dat_ngay_bat_dau.EditValue != null) { m_dat_ngay_ket_thuc.EditValue = default_ngay_ket_thuc(); } } catch(Exception v_e) { CSystemLog_301.ExceptionHandle(v_e); } }