初学ALV应注意的问题

秋之韵

在使用ALV的时候,在给字段集合赋值时,abap是没有自动检查引号内的大小写的,但又必段是大写,我们在申明时用得是小写,在括号中也应该是大写.看例子就明白了
REPORT  z_ex1.
TYPE-POOLS: slis.
TABLES:t001.
DATA :BEGIN OF  company,
        code TYPE t001-bukrs,"公司代码
        name TYPE t001-butxt,"公司名称
        desc(200) TYPE  c, "描述
END OF company.
DATA itab LIKE t001 OCCURS 0 WITH HEADER LINE.
DATA itab_company LIKE company OCCURS 0 WITH HEADER LINE.
DATA:ws_fieldcat TYPE slis_t_fieldcat_alv WITH HEADER LINE,
     ws_fieldgroups_tab TYPE slis_t_sp_group_alv,
     ws_layout TYPE slis_layout_alv,
     ws_sortfields_tab TYPE slis_t_sortinfo_alv WITH HEADER LINE,
     ws_events TYPE slis_t_event.
SELECT * INTO TABLE itab FROM t001.
LOOP AT itab.
  company-code = itab-bukrs.
  company-name = itab-butxt.
  CONCATENATE itab-land1 itab-ort01 itab-adrnr INTO company-desc
SEPARATED BY ''
.
  APPEND company TO   itab_company.
ENDLOOP.

ws_fieldcat-tabname = 'ITAB'.
ws_fieldcat-fieldname = 'CODE'.
ws_fieldcat-seltext_m = '公司代码'.
ws_fieldcat-col_pos = 1.
ws_fieldcat-outputlen = 8.
ws_fieldcat-datatype = 'CHAR'.
WS_FIELDCAT-DO_SUM = ''.
ws_fieldcat-lzero =  'X'.
ws_fieldcat-no_zero =  'X'.
APPEND  ws_fieldcat.
CLEAR ws_fieldcat.
ws_fieldcat-tabname = 'ITAB'.
ws_fieldcat-fieldname = 'NAME'.
ws_fieldcat-seltext_m = '公司名称'.
ws_fieldcat-col_pos = 2.
ws_fieldcat-outputlen = 25.
ws_fieldcat-datatype = 'CHAR'.
WS_FIELDCAT-DO_SUM = ''.
ws_fieldcat-lzero =  'X'.
ws_fieldcat-no_zero =  'X'.
APPEND  ws_fieldcat.
CLEAR ws_fieldcat.
ws_fieldcat-tabname = 'ITAB'.  "itab我在前面是小写,在这里一定要大写,所有引号内的都必段是大写.
ws_fieldcat-fieldname = 'DESC'."如上
ws_fieldcat-seltext_m = '公司描述'.
ws_fieldcat-col_pos = 3.
ws_fieldcat-outputlen = 200.
ws_fieldcat-datatype = 'CHAR'.
WS_FIELDCAT-DO_SUM = ''.
ws_fieldcat-lzero =  'X'.
ws_fieldcat-no_zero =  'X'.
APPEND  ws_fieldcat.
CLEAR ws_fieldcat.
ws_layout-zebra = 'X'.
ws_layout-get_selinfos = 'X'.
ws_layout-colwidth_optimize = 'X'.
ws_layout-detail_popup = 'X'.
ws_layout-no_keyfix = 'X'.
ws_layout-no_totalline = 'X'.

CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
  EXPORTING
    is_layout         = ws_layout
    it_fieldcat       = ws_fieldcat[]
*    it_special_groups = ws_fieldgroups_tab[]
*    it_sort           = ws_sortfields_tab[]
*    it_events         = ws_events[]
    i_grid_title      = ''
  TABLES
    t_outtab          = itab_company
  EXCEPTIONS
    program_error     = 1
    OTHERS            = 2.

另一种情况在使用状态:set pf_status 'STA'.这里引号内的也必段是大写.
这些是初学时容易犯的错误.在此提醒一下初学的人.

jinnyjh2003

本人中过一次招，之后就很注意了。

laoguisiyu

我也犯过同样的错误，