private void 入库ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            frm_Stock_Add fva1 = null;

            if (dataGridView1.RowCount > 0)
            {
                string str1 = dataGridView1.SelectedRows[0].Cells[0].Value.ToString();
                fva1 = new frm_Stock_Add(str1);
            }
            else
            {
                fva1 = new frm_Stock_Add();
            }
            if (fva1.ShowDialog() == System.Windows.Forms.DialogResult.Yes)
            {
                frm_Stock_Display_Load(null, null);
            }
        }
        /// <summary>
        /// 库存管理子系统。包含入库、出库、查看库存列表;
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void 入库ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            frm_Stock_Add fsa1 = new frm_Stock_Add();

            fsa1.ShowDialog();
        }