web dynpro message（备忘用）

 1     DATA lo_api_controller     TYPE REF TO if_wd_controller.
 2     DATA lo_message_manager    TYPE REF TO if_wd_message_manager.
 3 
 4     lo_api_controller ?= wd_this->wd_get_api( ).
 5     CALL METHOD lo_api_controller->get_message_manager
 6       RECEIVING
 7         message_manager = lo_message_manager.
 8 
 9     DATA lv_ebeln TYPE ebeln.
10     lv_ebeln = WD_COMP_CONTROLLER->cust_get_if( ).
11 
12 
13     IF lv_ebeln is INITIAL.
14 
15 * report message
16 
17       CALL METHOD lo_message_manager->REPORT_ERROR_MESSAGE
18         EXPORTING
19           message_text              = ‘请输入必要的字段！‘
20           show_as_popup             = ‘X‘
21           cancel_navigation         = ‘X‘
22 *        enable_message_navigation = ‘X‘
23           .
24     ENDIF.