private void btnNew_Click(object sender, EventArgs e)
        {
            零星采购明细 frm = new 零星采购明细(m_authorityFlag, null);

            frm.ShowDialog();

            RefreshDataGridView();
        }
        private void dataGridView1_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
        {
            string billNo = dataGridView1.CurrentRow.Cells["单据号"].Value.ToString();
            零星采购明细 frm    = new 零星采购明细(m_authorityFlag, billNo);

            frm.ShowDialog();

            RefreshDataGridView();
            PositioningRecord(billNo);
        }