private void start_tinh_luong_process() { if(m_bgwk.IsBusy) { m_bgwk.CancelAsync(); } else { this.m_prb.Visible = true; m_ds_rpt_luong.RPT_LUONG.Clear(); m_bgwk.RunWorkerAsync(); m_e_bang_luong_status = e_bang_luong_status.DA_TINH; } }