该报表主要结构如下，完整代码见文末。
- f_call_rfc_wait: 发起异步调用，等待 1 秒钟，来模拟每隔 1 秒刷新屏幕的效果。
- f_display_data: ALV 常规操作，调用函数 REUSE_ALV_LIST_DISPLAY 显示 ALV 数据。
- f_read_data: 调用函数 THUSRINFO，返回的结果作为 ALV 的数据源。该函数返回当前系统登录的用户名列表：
完整代码：
REPORT ZALV_AUTO_REFRESH.
DATA :
gt_user LIKE uinfo OCCURS 0 WITH HEADER LINE. " User info in SM04
*---------------------------------------------------------------------*
START-OF-SELECTION.
PERFORM f_read_data.
PERFORM f_display_data.
*---------------------------------------------------------------------*
* Form F_LIRE_DATA
*---------------------------------------------------------------------*
FORM f_read_data.
REFRESH gt_user.
* Get User's info
CALL FUNCTION 'THUSRINFO'
TABLES
usr_tabl = gt_user.
* Wait in a task
PERFORM f_call_rfc_wait.
ENDFORM. " F_READ_DATA
*---------------------------------------------------------------------*
* Form F_DISPLAY_DATA
*---------------------------------------------------------------------*
FORM f_display_data.
DEFINE m_sort.
add 1 to ls_sort-spos.
ls_sort-fieldname = &1.
append ls_sort to lt_sort.
END-OF-DEFINITION.
DEFINE m_event_exit.
clear ls_event_exit.
ls_event_exit-ucomm = &1.
ls_event_exit-after = 'X'.
append ls_event_exit to lt_event_exit.
END-OF-DEFINITION.
DATA :
ls_layout TYPE slis_layout_alv,
lt_sort TYPE slis_t_sortinfo_alv,
ls_sort TYPE slis_sortinfo_alv,
lt_event_exit TYPE slis_t_event_exit,
ls_event_exit TYPE slis_event_exit.
* Build Sort Table
m_sort 'ZEIT'.
* Build Event Exit Table
m_event_exit '&NTE'. " Refresh
ls_layout-zebra = 'X'.
ls_layout-colwidth_optimize = 'X'.
CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
EXPORTING
i_callback_program = sy-cprog
i_callback_user_command = 'USER_COMMAND'
is_layout = ls_layout
i_structure_name = 'UINFO'
it_sort = lt_sort
it_event_exit = lt_event_exit
TABLES
t_outtab = gt_user.
ENDFORM. " F_DISPLAY_DATA
*---------------------------------------------------------------------*
* FORM USER_COMMAND *
*---------------------------------------------------------------------*
FORM user_command USING i_ucomm TYPE syucomm
is_selfield TYPE slis_selfield. "#EC CALLED
CASE i_ucomm.
WHEN '&NTE'.
PERFORM f_read_data.
is_selfield-refresh = 'X'.
SET USER-COMMAND '&OPT'. " Optimize columns width
ENDCASE.
ENDFORM. " USER_COMMAND
*---------------------------------------------------------------------*
* Form F_CALL_RFC_WAIT
*---------------------------------------------------------------------*
FORM f_call_rfc_wait.
DATA lv_mssg(80). "#EC NEEDED
* Wait in a task
CALL FUNCTION 'RFC_PING_AND_WAIT' STARTING NEW TASK '001'
PERFORMING f_task_end ON END OF TASK
EXPORTING
seconds = 1 " Refresh time
busy_waiting = space
EXCEPTIONS
RESOURCE_FAILURE = 1
communication_failure = 2 MESSAGE lv_mssg
system_failure = 3 MESSAGE lv_mssg
OTHERS = 4.
ENDFORM. " F_CALL_RFC_WAIT
*---------------------------------------------------------------------*
* Form F_TASK_END
*---------------------------------------------------------------------*
FORM f_task_end USING u_taskname.
DATA lv_mssg(80). "#EC NEEDED
* Receiving task results
RECEIVE RESULTS FROM FUNCTION 'RFC_PING_AND_WAIT'
EXCEPTIONS
RESOURCE_FAILURE = 1
communication_failure = 2 MESSAGE lv_mssg
system_failure = 3 MESSAGE lv_mssg
OTHERS = 4.
CHECK sy-subrc EQ 0.
SET USER-COMMAND '&NTE'. " Refresh
ENDFORM. " F_TASK_END
*************** END OF PROGRAM Z_ALV_AUTO_REFRESH *********************
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