在GridView中添加一行(新行) 如统计信息等

1.  DataSet ds = null;
2.             string sql = "select * from test";
3.             using (DBManage db = new DBManage())
4.             {
5.                  ds = db.GetDataSet(sql);
7.                  DataColumn[] dc_arr = new DataColumn[] { ds.Tables[0].Columns["id"] };
8.                  ds.Tables[0].PrimaryKey = dc_arr;
9.                  DataRow _dr = ds.Tables[0].NewRow();
10.                  DataRow[] _dr_sum = ds.Tables[0].Select("id='1'");
11.                  if (_dr_sum.Length > 0)
12.                  {
13.                      _dr["id"] = "12";
14.                      _dr["t_name"] = "Totals:";
15.                      _dr["t_price"] = "0.00";
16.                      ds.Tables[0].Rows.Add(_dr);
17.                     //ds.Tables[0].Rows.InsertAt(_dr2, i);
                                    //i++;
18.                  }
19.              GridView1.DataSource = ds.Tables[0].DefaultView;
20.              GridView1.DataBind();
21.           }