private void btnAdd_Click(object sender, EventArgs e)
        {
            车间耗用单明细 frm = new 车间耗用单明细(null);

            frm.ShowDialog();
            RefrshData();
            PositioningRecord(frm.StrBillNo);
        }
        private void dataGridView1_DoubleClick(object sender, EventArgs e)
        {
            string billNo = dataGridView1.CurrentRow.Cells["单据号"].Value.ToString();

            车间耗用单明细 frm = new 车间耗用单明细(billNo);

            frm.ShowDialog();
            RefrshData();
            PositioningRecord(billNo);
        }