private void tlbtnSumDetailed_Click(object sender, EventArgs e)
        {
            DataSet ds = null;
            billinfo.Handle = tltxtHandle.Text;
            billinfo.Units = tltxtUnits.Text;
            ds = baseinfo.BuyStockSumDetailed(billinfo,"tb_StockSumDetailed",dtpStar.Value,dtpEnd.Value);
            dgvStockList.DataSource = ds.Tables[0].DefaultView;
        }
这里面的tb_StockSumDetailed这张表在数据库里没有啊