private bool is_da_chot_bang_luong() { US_GD_CHOT_BANG_LUONG v_us_dung_chung = new US_GD_CHOT_BANG_LUONG(); return v_us_dung_chung.IsDaChotBangLuongThang( CIPConvert.ToDecimal(m_txt_thang.EditValue) , CIPConvert.ToDecimal(m_txt_nam.EditValue)); }