C# DataTable

1 举例说明：要实现对一个现有的DataTable的数量一列进行操作，如果是第一次就设定为1，否则在原来基础上加1

 1             //新增商品对应的的数量
 2             dv = new DataView(dtTmpGoods);
 3             dv.RowFilter = "Goods_ID=" + "'" + strGoodsID + "'";
 4             DataTable tempTable = dv.ToTable();
 5             if (tempTable.Rows.Count <= 0)
 6             {
 7                 dr["Goods_Amount"] = "1";
 8             }
 9             else
10             {
11                 //有相同的商品时，不追加到销售订单表里，只修改商品的数量
12                 DataRow drTmp = dtTmpGoods.Rows.Find(strGoodsID);
13                 string strGoodsAmount = tempTable.Rows[0]["Goods_Amount"].ToString();
14                 drTmp["Goods_Amount"] = (Convert.ToInt32(strGoodsAmount) + 1).ToString();
15                 dtTmpGoods.AcceptChanges();
16                 CalculateSaleOrder();
17                 return;
18             }