谁知道datagridview 中修改cell内容，如何保存
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
        {
            string selectsql = "select * from eat order by 1";
            string ConStr = ConfigurationManager.ConnectionStrings["OraConn"].ToString();
            OracleConnection oraConn = new OracleConnection(ConStr);
            OracleCommand ocm = new OracleCommand(selectsql, oraConn);
            oraConn.Open();
            oap.SelectCommand = ocm;
            oap.Fill(dt);
            OracleCommandBuilder obder = new OracleCommandBuilder(oap);
            oap.Update(dt);
            dataGridView1.Update();
            MessageBox.Show("更新成功！");
        }
这段代码有点问题
修改的时候，在datagridview中会显示改前内容和修改后的内容，界面不好看看，能不能好的办法？