BKI_DichVuMatDat.US.US_GD_CONG_TAC.IsNGAY_KET_THUCNull C# (CSharp) Method

        public bool IsNGAY_KET_THUCNull()
        {
            return pm_objDR.IsNull("NGAY_KET_THUC");
        }

 private void setup_form_for_cham_dut_cong_tac(decimal ip_dc_id_gd_cong_tac, decimal ip_dc_id_phong_ban)
 {
     load_data_2_sle_nhan_vien(load_danh_sach_nhan_vien_theo_phong_ban(ip_dc_id_phong_ban));
     US_GD_CONG_TAC v_us_ct = new US_GD_CONG_TAC(ip_dc_id_gd_cong_tac);
     m_e_loai_cap_nhat = e_loai_cap_nhat.CHAM_DUT_CONG_TAC;
     setup_header_text("CHẤM DỨT CÔNG TÁC NHÂN VIÊN");
     setup_read_only(m_sle_chon_don_vi, m_sle_chon_vi_tri, m_sle_chon_nhan_vien, m_sle_chon_loai_cong_tac, m_sle_chon_quyet_dinh);
     m_dat_ngay_bat_dau.ReadOnly = true;
     m_sle_chon_nhan_vien.EditValue = v_us_ct.dcID_NHAN_VIEN;
     m_sle_chon_don_vi.EditValue = v_us_ct.dcID_DON_VI;
     m_sle_chon_loai_cong_tac.EditValue = v_us_ct.dcID_LOAI_CONG_TAC;
     m_sle_chon_quyet_dinh.EditValue = v_us_ct.dcID_QUYET_DINH;
     m_sle_chon_vi_tri.EditValue = v_us_ct.dcID_VI_TRI;
     m_dat_ngay_bat_dau.EditValue = v_us_ct.datNGAY_BAT_DAU;
     if (!v_us_ct.IsNGAY_KET_THUCNull())
     {
         m_dat_ngay_ket_thuc.EditValue = v_us_ct.datNGAY_KET_THUC;
     }
 }