DBGridEh1.DataSource.DataSet.Open;  while not DBGridEh1.DataSource.DataSet.Eof do  begin    {showmessage(‘CID : ‘+string(DBGridEh1.DataSource.DataSet.FieldByName(‘CID‘).Value) +        ‘--科目 :‘ + string(DBGridEh1.DataSource.DataSet.FieldByName(‘科目‘).Value) +        ‘--章节 :‘ + string(DBGridEh1.DataSource.DataSet.FieldByName(‘章节‘).Value)        ) ;   }    DBGridEh1.DataSource.DataSet.Edit;    DBGridEh1.DataSource.DataSet.FieldByName(‘章节‘).Value:=‘ww‘;    DBGridEh1.DataSource.DataSet.Post;    DBGridEh1.DataSource.DataSet.Next ;  end ;