WDA学习（6）：Component Usage(Select Options)
1.6 Component Usage（Select Options）
本实例如何使用Component组件SELECT_OPTIONS。在实际应用都是多个Web Dynpro Component组成的。可以直接在之前基础上操作，也可以新建一个项目。
1.Web Dynpro Component：Z_TEST_WDA2创建Component Use。
选择FLIGHTLISTVIEW视图组件，点击Create Controller Usage
选择Component Use为SELECT_OPTIONS的
修改Context页签
创建FLIGHT上下文节点，
修改Attributes页签
创建变量M_HANDLER，类型：IF_WD_SELECT_OPTIONS;
创建变量M_WD_SELECT_OPTIONS,类型：IWCI_WDR_SELECT_OPTIONS;
修改Layout页签
创建GROUP类型视图控件GROUP3；
创建ViewContianerUIElement类型视图控件，这个控件可以用来显示Compnent组件的视图View。这里用来显示SELECTION_OPTION。
创建BUTTON按钮类型视图控件BTN1，点击按钮获取SELECTION_OPTION值，根据条件查询flight。Action：FIND,自动生成Method:ONACTIONFIND方法。
创建TABLE类型视图控件TABLE1，显示查询出来的flight信息。
右键TABLE1控件->Creat Binding
修改Methods页签，
重写WDDOINIT方法，初始化SELECT_OPTIONS。
method WDDOINIT . data:lt_range_table type ref to data, rt_range_table type ref to data, read_only type abap_bool, typename type string. data:lr_componentcontroller type ref to ig_componentcontroller, l_ref_cmp_usage type ref to if_wd_component_usage. * create the used component l_ref_cmp_usage = wd_this->wd_cpuse_select_options( ). if l_ref_cmp_usage->has_active_component( ) is initial. l_ref_cmp_usage->create_component( ). endif. * get a pointer to the interface controller of the select options *component wd_this->m_wd_select_options = wd_this->wd_cpifc_select_options( ). * init the select screen wd_this->m_handler = wd_this->m_wd_select_options->init_selection_screen( ). * create a range table that consists of this new data element lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'S_CARR_ID' ). * add a new field to the selection wd_this->m_handler->add_selection_field( i_id = 'S_CARR_ID' it_result = lt_range_table i_read_only = read_only ). * create a range table that consists of this new data element lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'S_CONN_ID' ). * add a new field to the selection wd_this->m_handler->add_selection_field( i_id = 'S_CONN_ID' it_result = lt_range_table i_read_only = read_only ). endmethod.
重写ONACTIONFIND方法,通过获取SELECT_OPTIONS值，作为条件查询flight信息。
method ONACTIONFIND . data: node_flights type ref to if_wd_context_node. data: rt_carrid type ref to data. data: rt_connid type ref to data. data: t_flight type table of sflight. field-symbols: <fs_carrid> type table, <fs_connid> type table. * Retrieve the data from the select option rt_carrid = wd_this->m_handler->get_range_table_of_sel_field( i_id = 'S_CARR_ID' ). * Assign it to a field symbol assign rt_carrid->* to <fs_carrid>. * Retrieve the data from the select option rt_connid = wd_this->m_handler->get_range_table_of_sel_field( i_id = 'S_CONN_ID' ). * Assign it to a field symbol assign rt_connid->* to <fs_connid>. * Retrieve that data from the database. Normally it is suggested to * encapsulate the data retrieval in a separate class. * For simplicity, the SELECT statement has been implemented here. select * into corresponding fields of table t_flight from sflight where carrid in <fs_carrid> and connid in <fs_connid>. * Bind the data to the context node_flights = wd_context->get_child_node( name = `FLIGHT` ). node_flights->bind_elements( t_flight ). endmethod.
2．设置Window，将SELECTION_OPTION组件视图放入VIEW1
选择点击F4帮助小方块，找到SELECT_OPTIONS的VIEW屏幕
3.运行Web Dynpro Application，使用Selection options,点击find按钮。
Select Options组件详解
Select Options对应接口IF_WD_SELECT_OPTIONS对象select_handler，通过这个对象配置操作Select Options。
1.获取IF_WD_SELECT_OPTIONS接口对应对象;
初始化component组件
data:lr_componentcontroller type ref to ig_componentcontroller, l_ref_cmp_usage type ref to if_wd_component_usage. * create the used component l_ref_cmp_usage = wd_this->wd_cpuse_select_options( ). if l_ref_cmp_usage->has_active_component( ) is initial. l_ref_cmp_usage->create_component( ). endif.
获取IF_WD_SELECT_OPTIONS接口对应对象wd_this->m_handler；
* get a pointer to the interface controller of the select options *component wd_this->m_wd_select_options = wd_this->wd_cpifc_select_options( ). * init the select screen wd_this->m_handler = wd_this->m_wd_select_options->init_selection_screen( ).
2. IF_WD_SELECT_OPTIONS接口方法；
ADD_SELECTION_FIELD方法：添加select参数；
ADD_SELECTION_FIELDS方法：添加多个select参数；
GET_SELECTION_FIELD方法:获取select参数；
GET_SELECTION_FIELDS方法:获取select参数；
UPD_SELECTION_FIELD方法：更新select；
RESET_ALL_SELECTION_FIELDS方法：重置所有select参数；
RESET_SELECTION_FIELD方法：重置指定id的select参数；
CHECK_ALL_SELECTION_FIELDS方法：check所有select参数；
参数：
I_ID：select参数唯一识别标志；
I_DESCRIPTION：select参数描述；
I_WITHIN_BLOCK：ID of Enclosing Block；
I_IS_AUTO_DESCRIPTION：是否自动描述，默认为True;
IT_RESULT:结果内表，用来保存用户选择值，这个参数必须有；
I_OBLIGATORY：是否必输，默认为False;
I_VALUE_HELP_TYPE:指定help类型，
IF_WD_VALUE_HELP_HANDLER=>CO_PREFIX_SEARCHHELP;
IF_WD_VALUE_HELP_HANDLER=>CO_PREFIX_OVS,OVS帮助类型;
IF_WD_VALUE_HELP_HANDLER=>CO_PREFIX_APPLDEV;
IF_WD_VALUE_HELP_HANDLER=>CO_PREFIX_AUTO;
IF_WD_VALUE_HELP_HANDLER=>CO_PREFIX_NONE;
IF_WD_VALUE_HELP_HANDLER=>CO_VH_TYPE_NO_HELP，no input help;
IF_WD_VALUE_HELP_HANDLER=>CO_VH_TYPE_BACKEND,类型DDIC、QVS;
IF_WD_VALUE_HELP_HANDLER=>CO_VH_TYPE_CLOCK,类型时钟;
IF_WD_VALUE_HELP_HANDLER=>CO_VH_TYPE_CALENDAR，类型日历;
IF_WD_VALUE_HELP_HANDLER=>CO_VH_TYPE_VALUESET，值集;
I_VALUE_HELP_ID:help帮助唯一标识；
I_VALUE_HELP_MODE：help帮助模式，
I_VALUE_HELP_STRUCTURE：f4 help帮助对应table;
I_VALUE_HELP_STRUCTURE_FIELD:f4 help帮助对应字段；
I_HELP_REQUEST_HANDLER：handler for f4 help;
I_LOWER_CASE:是否允许小写；
I_MEMORY_ID：Memory ID for Default Value；
I_NO_EXTENSION：No Multiple Selection,默认为False;
I_NO_INTERVALS: No Intervals (Single Values Only)，默认为False;
I_AS_CHECKBOX:显示为check box;
I_AS_DROPDOWN:显示为下拉选择；
IT_VALUE_SET：下拉选择值内表，类型WDY_KEY_VALUE_TABLE，注意这是一个有序且key值唯一的内表；
I_READ_ONLY：是否只读，默认False;
I_DONT_CARE_VALUE:忽略的初始值表；
I_EXPLANATION: Explanation;
I_TOOLTIP: Quick Info;
I_IS_NULLABLE：是否允许空值；
I_FORMAT_PROPERTIES：参数格式；
CREATE_RANGE_TABLE方法：创建Range Table
GET_RANGE_TABLE_OF_SEL_FIELD方法： 返回结果Range Table，选择的select值内表；
SET_RANGE_TABLE_OF_SEL_FIELD：设置结果Range Table，select内表，可以用来重置结果表；
ADD_PARAMETER_FIELD方法：添加Parameter；
ADD_PARAMETER_FIELDS方法：添加多个Parameter;
GET_PARAMETER_FIELD方法：获取Parameter;
GET_PARAMETER_FIELDS方法：获取Parameter;
SET_VALUE_OF_PARAMETER_FIELD方法：设置parameter值；
GET_VALUE_OF_PARAMETER_FIELD方法：获取parameter值；
RESET_PARAMETER_FIELD方法：重置Parameter值；
RESET_ALL_PARAMETER_FIELDS方法：重置所有Parameter值；
CHECK_ALL_PARAMETER_FIELD方法：Check所有Parameter值；
参数：
I_VALUE：Parameter值；
ADD_HORIZONTAL_DIVIDER方法：添加水平线；
ADD_HORIZONTAL_DIVIDERS方法：添加多个水平线；
GET_HORIZONTAL_DIVIDER方法：获取水平线；
GET_HORIZONTAL_DIVIDERS方法：获取水平线；
参数：
I_ID：唯一标识；
I_WITHIN_BLOCK：ID of Enclosing Block;
ADD_TEXT_LINE方法：添加文本线；
ADD_TEXT_LINES方法：添加多个文本线；
GET_TEXT_LINE方法；
GET_TEXT_LINES方法；
I_ID：唯一标识
I_WITHIN_BLOCK：ID of Enclosing Block;
I_TEXT:文本；
I_DESIGN：默认CL_WD_TEXT_VIEW=>E_DESIGN-STANDARD
IT_TEXT_LINES方法：添加多个文本线；
ADD_BLOCK方法：添加块；
ADD_BLOCKS方法：添加多个块；
GET_BLOCK方法；
GET_BLOCKS方法；
I_ID：唯一标识；
I_WITHIN_BLOCK：ID of Enclosing Block;
I_BLOCK_TYPE：默认MC_BLOCK_TYPE_GROUP；
I_TITLE：Block标题；
I_HIDE_IF_EMPTY：是否隐藏，如果block为空，默认False；
I_WIDTH:默认’100%’;
I_STRETCHED_HORIZONTALLY:默认为True;
ADD_SELECTION_SCREEN_ITEM方法：添加slection screen;
ADD_SELECTION_SCREEN_ITEMS方法；
GET_SELECTION_SCREEN_ITEM方法；
GET_SELECTION_SCREEN_ITEMS方法；
REMOVE_SELECTION_SCREEN_ITEM方法；
REMOVE_ALL_SEL_SCREEN_ITEMS方法；
CHECK_SELECTION_SCREEN方法；
SET_GLOBAL_OPTIONS方法：设置全局功能；
参数：
I_DISPLAY_BTN_CANCEL：是否显示Cancel按钮；
I_DISPLAY_BTN_CHECK：是否显示Check按钮；
I_DISPLAY_BTN_RESET：是否显示Reset按钮；
I_DISPLAY_BTN_EXECUTE：是否显示Execute按钮；
3.创建Select option，下拉选择框，Parameter,Checkbox等；
示例代码:
DATA:lt_range_table type ref to data. "创建range table lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'S_CARR_ID' ). "创建select option wd_this->m_handler->add_selection_field( i_id = 'ID_CARR_ID' "id i_description = '航班ID' "描述 it_result = lt_range_table "结果内表 i_obligatory = abap_true "是否必输 i_value_help_structure = 'SFLIGHT' "help表结构 i_value_help_structure_field = 'CARRID' "help航班字段 ). "下拉选择内表 DATA:lt_value_set TYPE wdy_key_value_table. DATA:ls_value_set LIKE LINE OF lt_value_set. "下拉值 ls_value_set-key = '0002'. ls_value_set-value = '0002'. APPEND ls_value_set TO lt_value_set. ls_value_set-key = '0005'. ls_value_set-value = '0005'. APPEND ls_value_set TO lt_value_set. ls_value_set-key = '0017'. ls_value_set-value = '0017'. APPEND ls_value_set TO lt_value_set. ls_value_set-key = '0555'. ls_value_set-value = '0555'. APPEND ls_value_set TO lt_value_set. "创建range table lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'S_CONN_ID' ). "创建dropdown wd_this->m_handler->add_selection_field( i_id = 'ID_CONN_ID' i_description = 'Conn. ID' it_result = lt_range_table i_as_dropdown = abap_true it_value_set = lt_value_set i_read_only = abap_false ). "设置默认下拉默认值 TYPES:BEGIN OF s_range_default, sign TYPE char1, option TYPE char2, low TYPE S_CONN_ID, high TYPE S_CONN_ID, END OF s_range_default. FIELD-SYMBOLS:<fs_default> TYPE TABLE. DATA:lt_default TYPE REF TO DATA. DATA:wa_default TYPE s_range_default. "设置默认值 CREATE DATA lt_default TYPE TABLE OF s_range_default. ASSIGN lt_default->* TO <fs_default>. wa_default-low = '0002'. wa_default-option = 'EQ'. wa_default-sign = 'I'. APPEND wa_default TO <fs_default>. wd_this->m_handler->SET_RANGE_TABLE_OF_SEL_FIELD( I_ID = 'ID_CONN_ID' IT_RANGE_TABLE = lt_default ). "创建select option,no interval,no extension "PLANETYPE lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'S_PLANETYE' ). wd_this->m_handler->add_selection_field( i_id = 'ID_PLANETYE' i_description = 'Plane type' it_result = lt_range_table i_read_only = abap_false i_no_extension = abap_true "是否多值输入 i_no_intervals = abap_true "是否范围输入 i_value_help_structure = 'SFLIGHT' "help表结构 i_value_help_structure_field = 'PLANETYPE' "help字段 ). "创建range table lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'CHAR1' ). "创建checkbox wd_this->m_handler->add_selection_field( i_id = 'ID_CHECK' i_description = 'YES/NO' it_result = lt_range_table i_as_checkbox = abap_true ). DATA:lr_value TYPE REF TO DATA. CREATE DATA lr_value TYPE SFLIGHT-FLDATE. lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'S_DATE' ). "创建Parameter,日期 wd_this->m_handler->add_parameter_field( i_id = 'ID_FLDATE' i_description = 'Flight Date' i_value_help_structure = 'SFLIGHT' i_value_help_structure_field = 'FLDATE' i_value = lr_value ). "创建横线 wd_this->m_handler->add_horizontal_divider( i_id = 'ID_DIV1' ). "创建text line wd_this->m_handler->add_text_line( i_id = 'ID_TEXT_L1' i_text = 'text text text text text text text text' i_design = CL_WD_TEXT_VIEW=>E_DESIGN-HEADER1 ). "创建block "type:mc_block_type_group;mc_block_type_tray;mc_block_type_transp_container wd_this->m_handler->add_block( i_id = 'ID_BLK1' i_block_type = if_wd_select_options=>mc_block_type_group i_title = 'BLOCK1' i_hide_if_empty = abap_false i_width = '100%' i_stretched_horizontally = abap_true ). "Set the Global options "是否显示cancel,check,reset,execute按钮 wd_this->m_handler->set_global_options( I_DISPLAY_BTN_CANCEL = abap_false I_DISPLAY_BTN_CHECK = abap_false I_DISPLAY_BTN_RESET = abap_false I_DISPLAY_BTN_EXECUTE = abap_false ).
4.点击find按钮时，onactionfind方法，获取选择值；
示例代码：
data: node_flights type ref to if_wd_context_node. data: rt_table type ref to data. data: lv_fldate TYPE REF TO data. data: t_flight TYPE TABLE OF sflight. field-symbols: <fs_carrid> type table, <fs_connid> type table, <fs_planetype> TYPE table, <fs_fldate> TYPE SFLIGHT-FLDATE, <fs_value> TYPE table. "获取carrid rt_table = wd_this->m_handler->get_range_table_of_sel_field( i_id = 'ID_CARR_ID' ). assign rt_table->* to <fs_carrid>. "获取connid rt_table = wd_this->m_handler->get_range_table_of_sel_field( i_id = 'ID_CONN_ID' ). assign rt_table->* to <fs_connid>. "获取planetype rt_table = wd_this->m_handler->get_range_table_of_sel_field( i_id = 'ID_PLANETYE' ). assign rt_table->* to <fs_planetype>. "获取fldate,paramter获取方式 lv_fldate = wd_this->m_handler->get_value_of_parameter_field( i_id = 'ID_FLDATE'). IF lv_fldate IS INITIAL. DATA:lv_date TYPE D. lv_date = sy-datum. GET REFERENCE OF lv_date INTO lv_fldate. assign lv_fldate->* to <fs_fldate>. ELSE. assign lv_fldate->* to <fs_fldate>. ENDIF. "获取check box值 rt_table = wd_this->m_handler->get_range_table_of_sel_field( i_id = 'ID_CHECK' ). assign rt_table->* to <fs_value>. "根据选择值作为条件，筛选数据 select * into corresponding fields of table t_flight from sflight where carrid in <fs_carrid> and connid in <fs_connid> and planetype in <fs_planetype> and fldate = <fs_fldate>. "context上下文绑定数据 node_flights = wd_context->get_child_node( name = `FLIGHT` ). node_flights->bind_elements( t_flight ).
5.点击reset按钮时，onactionreset方法，重置选择值；
实例代码：
"重置方法 "重置所有select "wd_this->m_handler->RESET_ALL_SELECTION_FIELDS( ). "重置单个select wd_this->m_handler->RESET_SELECTION_FIELD( i_id = 'ID_CARR_ID' ). "select,重新设置结果表 DATA:lt_range_table TYPE REF TO data. lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'S_CARR_ID' ). wd_this->m_handler->set_range_table_of_sel_field( i_id = 'ID_CARR_ID' it_range_table = lt_range_table ). "重置所有Parameter "wd_this->m_handler->RESET_ALL_PARAMETER_FIELDS( ). "重置单个Parameter "wd_this->m_handler->RESET_PARAMETER_FIELD( i_id = 'ID_FLDATE' ). DATA:lr_fldate TYPE REF TO data. CREATE DATA lr_fldate TYPE SFLIGHT-FLDATE. wd_this->m_handler->set_value_of_parameter_field( i_id = 'ID_FLDATE' i_value = lr_fldate ).
1.7.1问题1：使用自定义search help
1.使用se11，创建应用help的字段结构ZSFLIGHT_HELP_STRC;
2.创建search help：ZSFLIGHT_SEARCH_HELP
创建search help exit对应function：ZSFLIGHT_SEARCH_HELP
Changing参数:SHLP type:SHLP_DESCR; CALLCONTROL type:DDSHF4CTRL;
Tables参数：SHLP_TAB type:SHLP_DESCT; RECORD_TAB like:SEAHLPRES;
实例代码：
FUNCTION ZSFLIGHT_SEARCH_HELP. *"---------------------------------------------------------------------- *"*"Local Interface: *" TABLES *" SHLP_TAB TYPE SHLP_DESCT OPTIONAL *" RECORD_TAB STRUCTURE SEAHLPRES OPTIONAL *" CHANGING *" REFERENCE(SHLP) TYPE SHLP_DESCR *" REFERENCE(CALLCONTROL) TYPE DDSHF4CTRL *"---------------------------------------------------------------------- DATA:lt_source_tab LIKE TABLE OF sflight, ls_shlp_tab TYPE shlp_descr, ls_selopt TYPE ddshselopt. DATA:lr_carrid TYPE RANGE OF sflight-carrid. DATA:ls_carrid LIKE LINE OF lr_carrid. DATA:lr_connid TYPE RANGE OF sflight-connid. DATA:ls_connid LIKE LINE OF lr_connid. DATA:lr_planetype TYPE RANGE OF sflight-planetype. DATA:ls_planetype LIKE LINE OF lr_planetype. IF callcontrol-step = 'SELECT'. READ TABLE shlp_tab INTO ls_shlp_tab INDEX 1. IF ls_shlp_tab-selopt IS NOT INITIAL. LOOP AT ls_shlp_tab-selopt INTO ls_selopt. CASE ls_selopt-shlpfield. WHEN 'CARRID'. ls_carrid-sign = ls_selopt-sign. ls_carrid-option = ls_selopt-option. ls_carrid-low = ls_selopt-low. ls_carrid-high = ls_selopt-high. APPEND ls_carrid TO lr_carrid. WHEN 'CONNID'. ls_connid-sign = ls_selopt-sign. ls_connid-option = ls_selopt-option. ls_connid-low = ls_selopt-low. ls_connid-high = ls_selopt-high. APPEND ls_connid TO lr_connid. WHEN 'PLANETYPE'. ls_planetype-sign = ls_selopt-sign. ls_planetype-option = ls_selopt-option. ls_planetype-low = ls_selopt-low. ls_planetype-high = ls_selopt-high. APPEND ls_planetype TO lr_planetype. WHEN OTHERS. ENDCASE. ENDLOOP. ENDIF. SELECT * INTO TABLE lt_source_tab FROM sflight WHERE carrid IN lr_carrid AND connid IN lr_connid AND planetype IN lr_planetype. SORT lt_source_tab. DELETE ADJACENT DUPLICATES FROM lt_source_tab. CALL FUNCTION 'F4UT_RESULTS_MAP' EXPORTING source_structure = 'SFLIGHT' apply_restrictions = ' ' TABLES shlp_tab = shlp_tab record_tab = record_tab source_tab = lt_source_tab CHANGING shlp = shlp callcontrol = callcontrol EXCEPTIONS illegal_structure = 1 OTHERS = 2. IF sy-subrc = 0. callcontrol-step = 'DISP'. ELSE. callcontrol-step = 'EXIT'. ENDIF. ENDIF. ENDFUNCTION.
设置Search Help,CONNID,PLANETYPE设置自定义的ZSFLIGHT_SEARCH_HELP，search help。
程序添加使用自定义search help
示例代码：
"使用新的search help "创建range table lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'S_CARR_ID' ). "创建select option wd_this->m_handler->add_selection_field( i_id = 'S_CARRID' "id i_description = 'carr. id.' "描述 it_result = lt_range_table "结果内表 i_no_extension = abap_true "是否多值输入 i_no_intervals = abap_true "是否范围输入 i_value_help_structure = 'ZSFLIGHT_HELP_STRC' "help结构 i_value_help_structure_field = 'CARRID' "help字段 ). "创建range table lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'S_CONN_ID' ). "创建select option wd_this->m_handler->add_selection_field( i_id = 'S_CONNID' "id i_description = 'conn. id.' "描述 it_result = lt_range_table "结果内表 i_no_extension = abap_true "是否多值输入 i_no_intervals = abap_true "是否范围输入 i_value_help_structure = 'ZSFLIGHT_HELP_STRC' "help结构 i_value_help_structure_field = 'CONNID' "help字段 ). "创建range table lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'S_PLANETYE' ). "创建select option wd_this->m_handler->add_selection_field( i_id = 'S_PLANETYPE' "id i_description = 'plane type' "描述 it_result = lt_range_table "结果内表 i_no_extension = abap_true "是否多值输入 i_no_intervals = abap_true "是否范围输入 i_value_help_structure = 'ZSFLIGHT_HELP_STRC' "help结构 i_value_help_structure_field = 'PLANETYPE' "help字段 ).
选择一个search help可以带出三个域值。
1.7.2问题2：更新selection option标签描述
添加按钮，绑定事件set_text,用来更新selection option描述。使用UPD_SELECTION_FIELD这个方法不能更新selection option描述。
示例代码：
method ONACTIONSET_TEXT . DATA:lt_range_table type ref to data. "创建range table lt_range_table = wd_this->m_handler->create_range_table( i_typename = 'S_CARR_ID' ). * wd_this->m_handler->REMOVE_SELECTION_SCREEN_ITEM( i_id = 'ID_CARR_ID' ). * wd_this->m_handler->ADD_SELECTION_FIELD( * i_id = 'ID_CARR_ID' "id * i_description = 'tanglujie' "描述 * it_result = lt_range_table "结果内表 * i_obligatory = abap_true "是否必输 * ). DATA:tt_selection_screen_item TYPE IF_WD_SELECT_OPTIONS=>TT_SELECTION_SCREEN_ITEM. FIELD-SYMBOLS:<FS_ITEM> like line of tt_selection_screen_item. wd_this->m_handler->GET_SELECTION_FIELDS( IMPORTING ET_FIELDS = tt_selection_screen_item ). read table tt_selection_screen_item with key M_ID = 'ID_CARR_ID' assigning <FS_ITEM>. "先移除 WD_THIS->M_HANDLER->REMOVE_ALL_SEL_SCREEN_ITEMS( ). <FS_ITEM>-m_description = 'Flight ID'. WD_THIS->M_HANDLER->ADD_SELECTION_FIELDS( IT_FIELDS = tt_selection_screen_item ). endmethod.
本文来自博客园，作者：渔歌晚唱，转载请注明原文链接：https://www.cnblogs.com/tangToms/p/12838262.html
