private void load_data_2_grid() { US_GD_CONG_TAC v_us_dung_chung = new US_GD_CONG_TAC(); DataSet v_op_ds = new DataSet(); v_op_ds.Tables.Add(); v_us_dung_chung.BAO_CAO(v_op_ds); m_trl_bao_cao.KeyFieldName = "ID"; m_trl_bao_cao.ParentFieldName = "ID_DON_VI_CAP_TREN"; m_trl_bao_cao.DataSource = v_op_ds.Tables[0]; m_trl_bao_cao.ExpandAll(); }