为什么没有数据呢？

帮忙看看红色部分有没有错误，为什么没有数据呢？private void ToolBar_SaveClick(object sender, CancelEventArgs e)
        {            //saveData();
            bool result = true;
            DetailGrid.EndEdit();
            DataTable EntryBillDetaillInfoTable = (DataTable)bindingSource.DataSource;
            string BillNo = txtBillNo.Text.Trim();
            DateTime BillDate = txtBillDate.Value;
            string WarehouseID = comboTreeBox1.SelectedValue.ToString();
            //string IDCard = comboTextBox2.SelectedValue.ToString();
            string IDCard = "1234567891231456789";
            string BussineyTypeID = comboBox4.SelectedValue.ToString();
            string Description = textBox2.Text;
            DateTime CreateDateTime = dateTimePicker1.Value;
            string Creater = textBox5.Text;
            DateTime SumDate = dateTimePicker2.Value;
            string CompanyID = "1";
            string Signer = comboBox3.Text;
            DateTime SigneDate = dateTimePicker2.Value;
            inoutmanagebill.AddEntryBillMaster(BillNo, BillDate, Description,
                                          CompanyID, WarehouseID, IDCard,
                                           Creater, CreateDateTime, Signer, SigneDate);            string msg = string.Empty;
            DataRow[] rows = EntryBillDetaillInfoTable.Select("flag=1");
           
            foreach (DataRow row in rows)
            {
                string colGoodsID = row["colGoodsID"].ToString().Trim();                string colUnit = row["colUnit"].ToString().Trim();                string colAmount = row["colAmount"].ToString().Trim();
                string Weight = row["Weight"].ToString().Trim();                string colMemo = row["colMemo"].ToString().Trim();
                inoutmanagebill.AddEntryBillDetail(BillNo, Description,
                                        colGoodsID, colAmount, Weight,
                                       SumDate, colMemo, colUnit, BussineyTypeID);            }
        }