背景
在表维护程序SM30的使用过程中，经常需要自动填充和修改一些值，比较常规的做法是修改屏幕逻辑流，但是如果重新激活了SM30,那么逻辑流就要重写，相对比较麻烦，之前接触过表维护程序中的‘事件’，经过研究得出以下方法
原理
| 事件编号 | 事件功能 |
|---|---|
| 01 | 保存前修改数据 |
| 05 | 创建数据时修改 |
| 21 | 退出单元格编辑时填充隐藏字段 |
步骤
1、生成表维护程序，建议做一个维护视图，设置字段read only
2、针对事件分别创建子例程（01事件中，注意变量total中的组件ACTION, 改字段用于标记条目的属性）
3、实现如下代码，可根据实际需求调整
本例的版本号ZZVER每修改一次，自增1，故在事件01中实现，其他字段用于实时记录前台，也可以写到01事件当中
*&---------------------------------------------------------------------*
*& 新增条目事件
*&----------------------------------------------------------------------
form sub_new_entry.
assign component 'CREATED_BY' of structure <table1> to field-symbol(<fs_field>).
if <fs_field> is assigned and <fs_field> is initial.
<fs_field> = sy-uname.
unassign <fs_field>.
endif.
assign component 'CREATED_ON' of structure <table1> to <fs_field>.
if <fs_field> is assigned.
<fs_field> = sy-datum.
unassign <fs_field>.
endif.
assign component 'CREATED_AT' of structure <table1> to <fs_field>.
if <fs_field> is assigned.
<fs_field> = sy-uzeit.
unassign <fs_field>.
endif.
" assign component 'ZZVER' of structure <table1> to <fs_field>.
" if <fs_field> is assigned.
" <fs_field> = 1.
" unassign <fs_field>.
" endif.
endform.
*&---------------------------------------------------------------------*
*& 修改条目事件
*&----------------------------------------------------------------------
form sub_change_entry.
"check sy-ucomm eq 'SAVE'.
" 检查当前行是否为新增行
read table total with key <f1_x>.
check sy-subrc eq 0.
assign component 'ACTION' of structure total to field-symbol(<fs_action>).
if sy-subrc eq 0 and <fs_action> ne 'N'."不是新增行则继续 .
assign component 'CHANGED_BY' of structure <table1> to field-symbol(<fs_field>).
if <fs_field> is assigned.
<fs_field> = sy-uname.
unassign <fs_field>.
endif.
assign component 'CHANGED_ON' of structure <table1> to <fs_field>.
if <fs_field> is assigned.
<fs_field> = sy-datum.
unassign <fs_field>.
endif.
assign component 'CHANGED_AT' of structure <table1> to <fs_field>.
if <fs_field> is assigned.
<fs_field> = sy-uzeit.
unassign <fs_field>.
endif.
" assign component 'ZZVER' of structure <table1> to <fs_field>.
" if <fs_field> is assigned.
" <fs_field> = conv i( <fs_field> ) + 1.
" CONDENSE <fs_field>.
" endif.
endif.
endform.
form sub_before_save.
"自动版本号修改
loop at zmdgv_dms_div_total.
read table total index sy-tabix.
assign component 'ACTION' of structure total to field-symbol(<fs_field>).
if sy-subrc eq 0.
check <fs_field> eq 'N' or <fs_field> eq 'U'.
endif.
if zmdgv_dms_div_total-zzver is initial.
zmdgv_dms_div_total-zzver = 1.
else.
zmdgv_dms_div_total-zzver = zmdgv_dms_div_total-zzver + 1.
endif.
condense zmdgv_dms_div_total-zzver.
modify zmdgv_dms_div_total.
endloop.
endform.备注
视图簇维护需要转换total变量，联系QQ:2212332116