//添加
        private void toolAdd_Click(object sender, EventArgs e)
        {
            GroupBuyItemAddForm f = new GroupBuyItemAddForm(db, m_Promotion);

            if (f.ShowDialog() == DialogResult.OK)
            {
                m_Offer.Add(f.m_Offer, f.m_discoutType + "#" + f.m_discout.ToString());
                m_Promotion.menuIds = BathClass.assemble(m_Offer);
                db.SubmitChanges();
                dgvDetails_show();
            }
        }
 //添加
 private void toolAdd_Click(object sender, EventArgs e)
 {
     GroupBuyItemAddForm f = new GroupBuyItemAddForm(db, m_Promotion);
     if (f.ShowDialog() == DialogResult.OK)
     {
         m_Offer.Add(f.m_Offer, f.m_discoutType + "#" + f.m_discout.ToString());
         m_Promotion.menuIds = BathClass.assemble(m_Offer);
         db.SubmitChanges();
         dgvDetails_show();
     }
 }