1、文档介绍
在ALV中，可以通过增加页眉和页脚，丰富ALV的展示。除了基本的页眉和页脚，还可以通过插入HTML代码的方式展示更加丰富的页眉和页脚，本篇文章将介绍ALV和OOALV中页眉页脚的使用。
2、ALV页眉页脚
2.1、显示内容
效果如下
页眉和页脚，都通过函数REUSE_ALV_COMMENTARY_WRITE显示内容。
页眉
"--------------------@斌将军--------------------
FORM FRM_TOP_OF_PAGE .
DATA:lt_listheader TYPE slis_t_listheader,
ls_listheader TYPE slis_listheader.
CLEAR:ls_listheader.
ls_listheader-typ = 'H'."标题
ls_listheader-info = '页眉'.
APPEND ls_listheader TO lt_listheader.
CLEAR ls_listheader.
ls_listheader-typ = 'S'.
ls_listheader-key = '编制单位:'.
ls_listheader-info = '1100'.
APPEND ls_listheader TO lt_listheader.
CLEAR ls_listheader.
ls_listheader-typ = 'S'.
ls_listheader-info = '1200'.
APPEND ls_listheader TO lt_listheader.
CLEAR ls_listheader.
ls_listheader-typ = 'A'.
ls_listheader-info = '单位:元'.
APPEND ls_listheader TO lt_listheader.
CALL FUNCTION 'REUSE_ALV_COMMENTARY_WRITE'
EXPORTING
it_list_commentary = lt_listheader "显示的数据
i_logo = 'ENJOYSAP_LOGO' "显示的图片LOGO
* I_END_OF_LIST_GRID =
* I_ALV_FORM =
.
ENDFORM. " FRM_TOP_OF_PAGE
"--------------------@斌将军--------------------
页脚
"--------------------@斌将军--------------------
FORM FRM_END_OF_LIST .
DATA:lt_listheader TYPE slis_t_listheader,
ls_listheader TYPE slis_listheader.
CLEAR:ls_listheader.
ls_listheader-typ = 'H'.
ls_listheader-info = '页脚'.
APPEND ls_listheader TO lt_listheader.
CLEAR ls_listheader.
ls_listheader-typ = 'S'.
ls_listheader-key = '作者:'.
ls_listheader-info = '斌将军'.
APPEND ls_listheader TO lt_listheader.
CALL FUNCTION 'REUSE_ALV_COMMENTARY_WRITE'
EXPORTING
it_list_commentary = lt_listheader
i_logo = 'ENJOYSAP_LOGO'
* I_END_OF_LIST_GRID =
* I_ALV_FORM =
.
ENDFORM. " FRM_END_OF_LIST
"--------------------@斌将军--------------------
2.2、ALV事件实现效果
实现页眉和页脚，都可以通过注册ALV事件EVENT，调用对应的子例程，显示对应内容
事件代码
"--------------------@斌将军--------------------
DATA:gt_event TYPE slis_t_event."事件
FORM frm_get_event.
DATA:lv_frm_top_of_page TYPE slis_formname VALUE 'FRM_TOP_OF_PAGE',"页眉子例程
lv_frm_end_of_list TYPE slis_formname VALUE 'FRM_END_OF_LIST',"页脚子例程
ls_events TYPE slis_alv_event.
"获取事件
CALL FUNCTION 'REUSE_ALV_EVENTS_GET'
EXPORTING
i_list_type = 0
IMPORTING
et_events = gt_event
EXCEPTIONS
list_type_wrong = 1
OTHERS = 2.
IF sy-subrc <> 0.
MESSAGE ID sy-msgid TYPE sy-msgty
NUMBER sy-msgno
WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
"查找TOP_OF_PAGE事件，并将回调子例程传输给FORM
READ TABLE gt_event ASSIGNING FIELD-SYMBOL(<fs_ls_event>) WITH KEY name = slis_ev_top_of_page.
IF sy-subrc = 0.
<fs_ls_event>-form = lv_frm_top_of_page.
ELSE.
CLEAR:ls_events.
ls_events-form = lv_frm_top_of_page.
ls_events-name = lv_frm_top_of_page.
APPEND ls_events TO gt_event.
ENDIF.
"查找END_OF_LIST事件，并将回调子例程传输给FORM
READ TABLE gt_event ASSIGNING <fs_ls_event> WITH KEY name = slis_ev_end_of_list.
IF sy-subrc = 0.
<fs_ls_event>-form = lv_frm_end_of_list.
ELSE.
CLEAR:ls_events.
ls_events-form = lv_frm_end_of_list.
ls_events-name = lv_frm_end_of_list.
APPEND ls_events TO gt_event.
ENDIF.
ENDFORM. " FRM_GET_EVENT
"--------------------@斌将军--------------------
在调用ALV时，传入EVENT
2.3、ALV参数实现页眉
如果单独实现页眉效果，就不需要这么复杂，可以直接将页眉子例程传入ALV函数REUSE_ALV_GRID_DISPLAY_LVC的I_CALLBACK_TOP_OF_PAGE参数中，调用子例程
3、ALV展示HTML页眉页脚
效果如下
ALV
页眉和页脚的子例程代码类似
"--------------------@斌将军--------------------
FORM frm_html_top_of_page USING document TYPE REF TO cl_dd_document.
DATA:lv_pos TYPE i,
lv_text TYPE sdydo_text_element,
lv_buffer TYPE string.
lv_buffer = '<HTML><CENTER><H1>' && '页眉' && '</H1></CENTER></HTML>'.
CALL METHOD document->html_insert
EXPORTING
contents = lv_buffer
CHANGING
position = lv_pos.
lv_text = '标题'.
CALL METHOD document->add_text
EXPORTING
text = lv_text
sap_style = 'HEADING'.
"插入两行空行
CALL METHOD document->new_line.
CALL METHOD document->add_icon
EXPORTING
sap_icon = 'ICON_CUSTOMER'.
"STRONG是加粗
lv_text = '用户名：'.
CALL METHOD document->add_text
EXPORTING
text = lv_text
sap_emphasis = 'Strong'.
"间隔
CALL METHOD document->add_gap
EXPORTING
width = 2.
lv_text = '斌将军'.
CALL METHOD document->add_text
EXPORTING
text = lv_text
sap_fontsize = cl_dd_document=>large
sap_fontstyle = cl_dd_document=>serif
sap_emphasis = cl_dd_document=>emphasis.
"间隔
CALL METHOD document->add_gap
EXPORTING
width = 10.
CALL METHOD document->add_icon
EXPORTING
sap_icon = 'ICON_DATE'.
lv_text = '日期：'.
CALL METHOD document->add_text
EXPORTING
text = lv_text
sap_emphasis = 'Strong'.
CALL METHOD document->add_gap
EXPORTING
width = 2.
lv_text = '20240420'.
CALL METHOD document->add_text
EXPORTING
text = lv_text
sap_style = 'Key'.
CALL METHOD document->add_gap
EXPORTING
width = 10.
CALL METHOD document->add_icon
EXPORTING
sap_icon = 'ICON_INFORMATION'.
lv_text = '链接:'.
CALL METHOD document->add_text
EXPORTING
text = lv_text
sap_emphasis = 'Strong'.
CALL METHOD document->add_link
EXPORTING
url = 'http://www.baidu.com'
tooltip = '百度' "小手指的提示信息
text = 'Baidu'.
"横线
CALL METHOD document->underline.
ENDFORM. "HTML_TOP_OF_PAGE
"--------------------@斌将军--------------------
4、OOALV页眉页脚
效果如下
首选，如上图将界面分为上、中、下三部分。关于屏幕分割，也可以参考《OOALV 分割屏幕 》
"--------------------@斌将军--------------------
*&---------------------------------------------------------------------*
*& Form FRM_CREATE_CONTAINER_9000
*& 创建容器
*&---------------------------------------------------------------------*
FORM frm_create_container_9000.
"创建 容器
CREATE OBJECT g_container_9000
EXPORTING
repid = sy-repid
dynnr = '9000'
side = cl_gui_docking_container=>dock_at_top "ALV贴屏幕左边，从左边算屏幕宽度，
extension = 1000"屏幕宽度
style = cl_gui_control=>ws_child "可选参数，设置ALV是否可用手动拖动大小
EXCEPTIONS
cntl_error = 1
cntl_system_error = 2
create_error = 3
lifetime_error = 4
lifetime_dynpro_dynpro_link = 5
OTHERS = 6.
IF sy-subrc <> 0.
MESSAGE s001(00) WITH '屏幕初始化失败'.
LEAVE LIST-PROCESSING.
ENDIF.
"拆分成3行1列部分
CREATE OBJECT g_splitter
EXPORTING
parent = g_container_9000
rows = 3
columns = 1.
"第一行第一列 "用作页眉
CALL METHOD g_splitter->get_container
EXPORTING
row = 1
column = 1
RECEIVING
container = g_container_t.
CALL METHOD g_splitter->set_row_height "设置行高
EXPORTING
id = 1 "第几行
height = 20.
"第二行第一列
CALL METHOD g_splitter->get_container
EXPORTING
row = 2
column = 1
RECEIVING
container = g_container_m.
"第三行第一列 "用作页脚
CALL METHOD g_splitter->get_container
EXPORTING
row = 3
column = 1
RECEIVING
container = g_container_e.
CALL METHOD g_splitter->set_row_height "设置行高
EXPORTING
id = 3 "第几行
height = 20.
CREATE OBJECT g_grid "中间部分为展示主数据
EXPORTING
i_parent = g_container_m.
ENDFORM.
"--------------------@斌将军--------------------
定义类和方法，实现页眉和页脚
"--------------------@斌将军--------------------
CLASS alv_event_9000 DEFINITION DEFERRED."
CLASS alv_event_9000 DEFINITION.
PUBLIC SECTION.
METHODS handle_top_of_page FOR EVENT top_of_page OF cl_gui_alv_grid
IMPORTING e_dyndoc_id.
METHODS handle_end_of_list FOR EVENT end_of_list OF cl_gui_alv_grid
IMPORTING e_dyndoc_id.
ENDCLASS. "alv_event_9000 DEFINITION
*----------------------------------------------------------------------*
* CLASS BELOW_ALV_EVENT IMPLEMENTATION 定义的事件类对应的事件响应模块
*----------------------------------------------------------------------*
CLASS alv_event_9000 IMPLEMENTATION.
METHOD handle_top_of_page.
PERFORM frm_event_top_of_page USING g_dyndoc_t.
ENDMETHOD.
METHOD handle_end_of_list.
PERFORM frm_event_end_of_list USING g_dyndoc_e.
ENDMETHOD.
ENDCLASS. "alv_event_9000 IMPLEMENTATION
"--------------------@斌将军--------------------
在事件中注册页眉和页脚方法
"--------------------@斌将军--------------------
FORM frm_alv_event_9000.
DATA: lr_event_handler TYPE REF TO alv_event_9000.
IF lr_event_handler IS INITIAL.
CREATE OBJECT lr_event_handler.
ENDIF.
SET HANDLER lr_event_handler->handle_top_of_page FOR g_grid.
SET HANDLER lr_event_handler->handle_end_of_list FOR g_grid.
ENDFORM.
"--------------------@斌将军--------------------
显示ALV
"--------------------@斌将军--------------------
CALL METHOD g_grid->set_table_for_first_display
EXPORTING
i_save = 'A'
i_default = 'X' "允许定义默认布局
is_layout = gs_layout
CHANGING
it_outtab = gt_alv
it_fieldcatalog = gt_fieldcat
EXCEPTIONS
invalid_parameter_combination = 1
program_error = 2
too_many_lines = 3
OTHERS = 4.
IF sy-subrc <> 0.
ENDIF.
CREATE OBJECT g_dyndoc_t
EXPORTING
style = 'ALV_GRID'.
* CALL METHOD g_dyndoc_t->initialize_document
* EXPORTING
* background_color = cl_dd_area=>col_textarea.
"对于页眉使用TOP_OF_PAGE事件
CALL METHOD g_grid->list_processing_events
EXPORTING
i_event_name = 'TOP_OF_PAGE'
i_dyndoc_id = g_dyndoc_t.
CREATE OBJECT g_dyndoc_e
EXPORTING
style = 'ALV_GRID'.
"对于页脚使用END_OF_LIST事件
CALL METHOD g_grid->list_processing_events
EXPORTING
i_event_name = 'END_OF_LIST'
i_dyndoc_id = g_dyndoc_e.
"--------------------@斌将军--------------------
页眉和页脚的子例程类似，页脚子例程如下
"--------------------@斌将军--------------------
FORM frm_event_end_of_list USING document TYPE REF TO cl_dd_document.
DATA:lv_pos TYPE i,
lv_text TYPE sdydo_text_element,
lv_buffer TYPE string.
lv_buffer = '<HTML><CENTER><H1>' && '页脚' && '</H1></CENTER></HTML>'.
CALL METHOD document->html_insert
EXPORTING
contents = lv_buffer
CHANGING
position = lv_pos.
"页脚HTML视图
IF g_html_e IS INITIAL.
CREATE OBJECT g_html_e
EXPORTING
parent = g_container_e.
ENDIF.
CALL METHOD document->merge_document.
document->html_control = g_html_e.
"显示
CALL METHOD document->display_document
EXPORTING
reuse_control = 'X'
parent = g_container_e
EXCEPTIONS
html_display_error = 1.
ENDFORM.
"--------------------@斌将军--------------------
参考代码，可通过链接获取
链接：https://pan.baidu.com/s/18bNmfmC9zSh1Si8W6AhQCQ?pwd=c0oj
提取码：c0oj
5、总结
以上就是关于ALV合并单元格的介绍，希望对您有所帮助。
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