private void UpdateALL()
{
daPlacement = helper.adapter(strSelect_Placement_Data);
daPlacement.Update(dtPlacement);
daTeacher = helper.adapter(strSelect_Teachers_Data);
daTeacher.Update(dtTeachers);
daTeacher.Update(dtSupervisor);
daSpareTime = helper.adapter(strSelect_SpareTime_Data);
daSpareTime.Update(dtSpareTime);
Main.fm.SetStatusText("自动生成听课安排成功!", 0);
Main.fm.flashListview();
}