偶然遇到的一个问题，开始自己以为是直接可以在dynpro画面编辑的某一个选项里面就可以设置了，其实不然，查来查去，不得不佩服sap系统自身的帮助和demo足够强大：

DEMO_DYNPRO_TABCONT_LOOP_AT

以后遇到了类似的问题可以用来参照。

还有就是遇到问题了，不必要东奔西走了，好好利用sap的东西就足够用了。

为了如果上不了环境的时候，代码如下：

REPORT demo_dynpro_tabcont_loop_at.

CONTROLS flights TYPE TABLEVIEW USING SCREEN 100.
DATA: cols LIKE LINE OF flights-cols,
lines TYPE i.

DATA: ok_code TYPE sy-ucomm,
save_ok TYPE sy-ucomm.

DATA: itab TYPE TABLE OF demo_conn.
TABLES demo_conn.

SELECT * FROM spfli INTO CORRESPONDING FIELDS OF TABLE itab.

LOOP AT flights-cols INTO cols WHERE index GT 2.
cols-screen-input = '0'.
MODIFY flights-cols FROM cols INDEX sy-tabix.
ENDLOOP.

CALL SCREEN 100.

MODULE status_0100 OUTPUT.
SET PF-STATUS 'SCREEN_100'.
DESCRIBE TABLE itab LINES lines.
flights-lines = lines.
ENDMODULE.

MODULE cancel INPUT.
LEAVE PROGRAM.
ENDMODULE.

MODULE read_table_control INPUT.
MODIFY itab FROM demo_conn INDEX flights-current_line.
ENDMODULE.

MODULE user_command_0100 INPUT.
save_ok = ok_code.
CLEAR ok_code.
CASE save_ok.
WHEN 'TOGGLE'.
LOOP AT flights-cols INTO cols WHERE index GT 2.
IF cols-screen-input = '0'.
cols-screen-input = '1'.
ELSEIF cols-screen-input = '1'.
cols-screen-input = '0'.
ENDIF.
MODIFY flights-cols FROM cols INDEX sy-tabix.
ENDLOOP.
WHEN 'SORT_UP'.
READ TABLE flights-cols INTO cols WITH KEY selected = 'X'.
IF sy-subrc = 0.
SORT itab STABLE BY (cols-screen-name+10) ASCENDING.
cols-selected = ' '.
MODIFY flights-cols FROM cols INDEX sy-tabix.
ENDIF.
WHEN 'SORT_DOWN'.
READ TABLE flights-cols INTO cols WITH KEY selected = 'X'.
IF sy-subrc = 0.
SORT itab STABLE BY (cols-screen-name+10) DESCENDING.
cols-selected = ' '.
MODIFY flights-cols FROM cols INDEX sy-tabix.
ENDIF.
WHEN 'DELETE'.
READ TABLE flights-cols INTO cols WITH KEY screen-input = '1'.
IF sy-subrc = 0.
LOOP AT itab INTO demo_conn WHERE mark = 'X'.
DELETE itab.
ENDLOOP.
ENDIF.
ENDCASE.
ENDMODULE.