hi,
« Sample program in REPORT.EVENTS IN ABAP »Events in an ABAP/4 Report Program
There is no mandatory event in a report program. Events are actually used to organize the statements and control the flow of the program. If the program contains no explicitly defined event blocks, all the statements in the program form the entire event block START-OF-SELECTION. ABAP runtime environment automatically introduces a START-OF-SELECTION at the first execution line.
ABAP/4 report programs are event driven programs. Following events are triggered in a report.
LOAD OF PROGRAM. - If propgram is of type 1, M, F, or S; then LOAD-OF-PROGRAM is trigerred first and then INITIALIZATION. The purpose of load of program is to load the program into system memory so that the program can be executed.
INITIALIZATION. - just once.
AT SELECTION-SCREEN OUTPUT. - when there is selection-screen
AT SELECTION-SCREEN. - when user interacts.
START-OF-SELECTION. - when F8.This is the default event in ABAP.
END-OF-SELECTION. - At the end
EVENTS IN A CLASSICAL REPORT:
1. INITIALIZATION: This is triggered when the report is loaded in memory.
2. AT SELECTION-SCREEN OUTPUT: This is triggered when the selection screen is loaded in memory before being displayed.
3. AT SELECTION-SCREEN/ : function key from F5 to F12 to perform interactive action on the list.
4. At user-command.
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Finally I want to include one point:
If you debug your report program from the Abap editor screen then it triggers from
1.Initialization,
2.At Selection-screen,
3.Start-of Selection,
4.End-of Selection,
5.Top-of-page,
6.End-of-page.
But if you debug from the selection-screen then it triggers from
1.At Selection-Screen,
2.Start-of-selection,
3.Top-of-page,
4.End-of-page.
Hope this helps, Do reward.
Bluesky
