//单击“新增”按钮事件
        private void tsbtnInsert_Click(object sender, EventArgs e)
        {
            FrmInsert insert = new FrmInsert();

            insert.n = 1;
            insert.ShowDialog();
        }
        //单击“修改”按钮事件
        private void tsbtnUpdate_Click(object sender, EventArgs e)
        {
            FrmInsert insert = new FrmInsert();

            insert.n      = 2;
            insert._id    = Convert.ToInt32(this.dgvList.SelectedRows[0].Cells["CommodityId"].Value);
            insert._name  = this.dgvList.SelectedRows[0].Cells["CommodityName"].Value.ToString();
            insert._sort  = this.dgvList.SelectedRows[0].Cells["CommoditySortName"].Value.ToString();
            insert._price = Convert.ToDouble(this.dgvList.SelectedRows[0].Cells["Price"].Value);
            insert._YorN  = Convert.ToBoolean(this.dgvList.SelectedRows[0].Cells["SpecialOffer"].Value);
            if (!this.dgvList.SelectedRows[0].Cells["NewPrice"].Value.ToString().Equals(string.Empty))
            {
                insert._newPrice = Convert.ToDouble(this.dgvList.SelectedRows[0].Cells["NewPrice"].Value);
            }
            insert.ShowDialog();
        }