private void btnOk_Click(object sender, EventArgs e)
        {
            MB mb = new MB();
            if (this.OprType == '*')
            {
                toolTip.Show("请选择操作类型", rdOut);
                //mb.Stop("温馨提示", "请选择操作类型\t");
                return;
            }

            if (this.Value <= 0)
            {
                toolTip.Show("数量无效\t",tbNum);
                tbNum.Focus();
                tbNum.SelectAll();
                return;
            }
            if (this.OprType != 'M' && String.IsNullOrEmpty(this.tbCustomer.Text.Trim()))
            {
                toolTip.Show("请输入客户名称\t",tbCustomer);
                tbCustomer.Focus();
                return;
            }
            if (String.IsNullOrEmpty(this.tbMark.Text.Trim()))
            {
                toolTip.Show("请输入备注\t",tbMark);
                tbMark.Focus();
                return;
            }

            if (OprType == 'O' && _OriNum < this.Value)
            {
                toolTip.Show("库存不足,请重新输入!\t",tbNum);
                tbNum.Focus();
                tbNum.SelectAll();
                return;
            }

            if (OprType == 'M' && _OriNum == Value)
            {
                mb.Stop("温馨提示", "库存无变化");
                return;
            }

            DialogResult = DialogResult.OK;
        }
        private void lvNotices_KeyDown(object sender, KeyEventArgs e)
        {
            MB mb = new MB("通知");
            if (e.KeyData == Keys.Delete)
            {
                if (lvNotices.SelectedItems.Count == 0)
                    return;

                if (mb.Question("是否要删除?") == DialogResult.No)
                    return;

                ListViewItem item = lvNotices.SelectedItems[0];
                DataRow row = item.Tag as DataRow;
                lvNotices.Items.Remove(item);
                row.Delete();
                btnOk.Enabled = true;
            }
        }