ABAP：利用SAP定时器自动刷新LIST-优快云博客

本文介绍如何使用SAPGUI的cl_gui_timer类自动刷新ABAP中的LIST，通过示例代码展示了设置定时器并触发刷新的方法，并与RFC_PING_AND_WAIT函数进行比较。

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ABAP：利用SAP定时器自动刷新LIST

上篇文章( 利用SAP定时器自动刷新ALV)中介绍了类cl_gui_timer的使用，这里继续使用该类来演示对LIST的自动刷新，以与网上通行的使用函数RFC_PING_AND_WAIT的刷新方法作个对比。

代码如下，需要说明的是，由于cl_gui_timer是SAPGUI的一个控件，必须使用 CALLMETHODcl_gui_cfw=>set_new_ok_code来触发USER-COMMAND事件，而不是SETUSER-COMMAND语句，大家不妨试下。

REPORTz04_gui_timer.

CLASSlcl_event_handlerDEFINITIONDEFERRED.

DATA:go_timerTYPEREFTOcl_gui_timer,
go_evt_hndlTYPEREFTOlcl_event_handler,
gt_spfliTYPETABLEOFspfliWITHHEADERLINE.
*&---------------------------------------------------------------------*
*&START-OF-SELECTION
*&---------------------------------------------------------------------*
START-OF-SELECTION.
SELECT*INTOTABLEgt_spfli
FROMspfliUPTO30ROWS.

PERFORMlist_output.
PERFORMinit_timer.
*&---------------------------------------------------------------------*
*&USER-COMMAND
*&---------------------------------------------------------------------*
ATUSER-COMMAND.
IFsy-ucomm='RFSH'.
sy-lsind=sy-lsind-1.
PERFORMlist_output.
ENDIF.
*&---------------------------------------------------------------------*
*&FormLIST_OUTPUT
*&---------------------------------------------------------------------*
FORMlist_output.
DATA:ls_spfliLIKELINEOFgt_spfli.
NEW-PAGEWITH-TITLELINE-SIZE60.
WRITE:/5'CARRID',AT30'CONNID'.
LOOPATgt_spfli.
WRITE:/gt_spfli-carridUNDER'CARRID',
gt_spfli-connidUNDER'CONNID'.
ENDLOOP.
ENDFORM."LIST_OUTPUT
*&---------------------------------------------------------------------*
*&CLASSlcl_event_handlerDEFINITION
*&---------------------------------------------------------------------*
CLASSlcl_event_handlerDEFINITION.
PUBLICSECTION.
METHODS:
handle_timerFOREVENTfinishedOFcl_gui_timer.
ENDCLASS."lcl_event_handlerDEFINITION
*&---------------------------------------------------------------------*
*&CLASSlcl_event_handlerIMPLEMENTATION
*&---------------------------------------------------------------------*
CLASSlcl_event_handlerIMPLEMENTATION.
METHODhandle_timer.
DELETEgt_spfliINDEX1.

*SETUSER-COMMAND'RFSH'.
CALLMETHODcl_gui_cfw=>set_new_ok_code
EXPORTING
new_code='RFSH'.
CALLMETHODgo_timer->run"必须重新激活定时器
EXCEPTIONS
OTHERS=9.
ENDMETHOD."handle_timer
ENDCLASS."lcl_event_handlerIMPLEMENTATION
*&---------------------------------------------------------------------*
*&FormINIT_TIMER
*&---------------------------------------------------------------------*
FORMinit_timer.

CHECKgo_timerISINITIAL.
CREATEOBJECTgo_timer
EXCEPTIONS
OTHERS=9.
CREATEOBJECTgo_evt_hndl.
SETHANDLERgo_evt_hndl->handle_timerFORgo_timer.

go_timer->interval=3."设置间隔为3秒
CALLMETHODgo_timer->run"激活定时器
EXCEPTIONS
OTHERS=9.
ENDFORM."INIT_TIMER

来源：http://blog.chinaunix.net/u2/86821/showart_2057764.html