OracleConnection myConnection = new OracleConnection(connectionString);//创建新的OracleDataAdapter对象
            OracleCommand myORACCommand = myConnection.CreateCommand();
             = queryString;
            myConnection.Open();
            OracleDataAdapter oraDA = new OracleDataAdapter(myORACCommand);
            DataSet ds = new DataSet();
            oraDA.Fill(ds); myConnection.Close();
            DataTable dtbl = ds.Tables[0];
            this.dataGridView1.DataSource = dtbl;
能注释下吗？

OracleConnection myConnection = new OracleConnection(connectionString);//创建新的OracleDataAdapter对象
            OracleCommand myORACCommand = myConnection.CreateCommand();//Command用于更新数据
             = queryString;
             myConnection.Open();//打开连接
             OracleDataAdapter oraDA = new OracleDataAdapter(myORACCommand); //创建一个适配器
             DataSet ds = new DataSet(); //创建一个数据集
             oraDA.Fill(ds); myConnection.Close(); //填充数据集并且关闭数据连接
             DataTable dtbl = ds.Tables[0]; //将数据集的数据复制给DATATABLE
             this.dataGridView1.DataSource = dtbl;//dataGridView1数据的来源