private void btnDelete_Click(object sender, EventArgs e)
        {
            foreach (DataGridViewRow item in dataGridView1.SelectedRows)
            {
                if (!m_sell.DeleteMatchingInfo(
                        Convert.ToInt32(item.Cells["序号"].Value), out m_err))
                {
                    MessageDialog.ShowPromptMessage(m_err);
                }
            }

            MessageDialog.ShowPromptMessage("删除成功!");

            dataGridView1.DataSource            = m_sell.GetProductCodeMatchingInfo();
            dataGridView1.Columns["序号"].Visible = false;
        }