ABAP ALV控件的使用

时间：2016-06-28 12:55:39 阅读：144 评论：0 收藏：0 [点我收藏+]

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ALV控件的使用
ALV(SAP List Viewer)控件是SAP业务中最常用的控件之一，本章先用一个简单的例子介绍用ALV控件显示数据，再以实例方式介绍ALV的强大功能。
本章主要内容有：
(1)简单的ALV控件实例
(2)自定义输出字段的ALV控件实例
(3)在屏幕上建立ALV控件
(4)自定义ALV控件的工具条按钮
(5)处理ALV控件双击事件
(6)通过ALV控件编辑内表和数据库更新

(7)ALV Tree的使用

1、简单的ALV控件实例

以学校表(YTJAYSCHOOL)为例，使用数据字典定义结构，通过ALV控件显示数据

REPORT  YTEST20160617001.
*定义内表
DATA WA_SCHOOL LIKE TABLE OF YTJAYSCHOOL WITH HEADER LINE.
*内表赋值
SELECT * INTO TABLE WA_SCHOOL FROM YTJAYSCHOOL.
*通过数据字典结构显示ALV
CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
  EXPORTING
    I_STRUCTURE_NAME = 'YTJAYSCHOOL'
  TABLES
    T_OUTTAB = WA_SCHOOL
  EXCEPTIONS
    PROGRAM_ERROR = 1
    OTHERS = 2.

输出结果：

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2、自定义输出字段的ALV控件实例

REPORT  YTEST20160617002.
*ALV使用到的类库
TYPE-POOLS:SLIS.
*一列描述
DATA WA_ALV_FIELD TYPE SLIS_FIELDCAT_ALV.
*列描述内表，列清单
DATA WA_ALV_FIELDCAT TYPE SLIS_T_FIELDCAT_ALV.
*定义内表
DATA WA_SCHOOL LIKE TABLE OF YTJAYSCHOOL WITH HEADER LINE.
*内表赋值
SELECT * INTO TABLE WA_SCHOOL FROM YTJAYSCHOOL.

*定义第一到第四个字段
WA_ALV_FIELD-COL_POS = 1.
WA_ALV_FIELD-FIELDNAME = 'YCT_ID'.
WA_ALV_FIELD-SELTEXT_M = '城市编号'.
APPEND WA_ALV_FIELD TO WA_ALV_FIELDCAT.

WA_ALV_FIELD-COL_POS = 2.
WA_ALV_FIELD-FIELDNAME = 'YSH_ID'.
WA_ALV_FIELD-SELTEXT_M = '学校编号'.
APPEND WA_ALV_FIELD TO WA_ALV_FIELDCAT.

WA_ALV_FIELD-COL_POS = 3.
WA_ALV_FIELD-FIELDNAME = 'YSH_NAME'.
WA_ALV_FIELD-SELTEXT_M = '学校名称'.
APPEND WA_ALV_FIELD TO WA_ALV_FIELDCAT.

WA_ALV_FIELD-COL_POS = 4.
WA_ALV_FIELD-FIELDNAME = 'YSH_ADDR'.
WA_ALV_FIELD-SELTEXT_M = '学校地址'.
APPEND WA_ALV_FIELD TO WA_ALV_FIELDCAT.

CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
  EXPORTING
    IT_FIELDCAT = WA_ALV_FIELDCAT
    TABLES
      T_OUTTAB = WA_SCHOOL.

输出结果：

技术分享

3、在屏幕上建立ALV控件

3.1、定义SCREEN窗口

在屏幕上创建两个文本元素控件、一个退出按钮控件、一个定制控制控件
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3.2、定义逻辑流

PROCESS BEFORE OUTPUT.
 MODULE STATUS_0100.

PROCESS AFTER INPUT.
 MODULE USER_COMMAND_0100.

3.3、主程序代码

REPORT  YTEST20160620001.
*功能码返回值
DATA:OK_CODE TYPE SY-UCOMM,
     SAVE_OK TYPE SY-UCOMM.
*定义内表，变量需要传递，不加HEADER LINE
DATA WA_SCHOOL TYPE TABLE OF YTJAYSCHOOL.
*内表赋值
SELECT * INTO TABLE WA_SCHOOL FROM YTJAYSCHOOL.
*ALVDATA是屏幕100中定义控制控件的名称
DATA:WA_CONTAINER TYPE SCRFNAME VALUE 'ALVDATA',
     ALV_GRID TYPE REF TO CL_GUI_ALV_GRID,
     WA_CUSTOM_CONTAINER TYPE REF TO CL_GUI_CUSTOM_CONTAINER.
*直接调用窗口
CALL SCREEN 100.

MODULE STATUS_0100 OUTPUT.
  SET PF-STATUS 'STATUS1'.
*如果窗口还没有创建ALV对象则创建它
  IF WA_CUSTOM_CONTAINER IS INITIAL.
    CREATE OBJECT WA_CUSTOM_CONTAINER
      EXPORTING
        CONTAINER_NAME = WA_CONTAINER.

    CREATE OBJECT ALV_GRID
      EXPORTING
        I_PARENT = WA_CUSTOM_CONTAINER.

    CALL METHOD ALV_GRID->SET_TABLE_FOR_FIRST_DISPLAY
      EXPORTING
        I_STRUCTURE_NAME = 'YTJAYSCHOOL'
      CHANGING
        IT_OUTTAB = WA_SCHOOL.
  ENDIF.
ENDMODULE.

MODULE USER_COMMAND_0100 INPUT.
  SAVE_OK = OK_CODE.
  CLEAR OK_CODE.
  CASE SAVE_OK.
    WHEN 'CANCEL'.
      LEAVE PROGRAM.
  ENDCASE.
ENDMODULE.

输出结果：

4、自定义ALV控件的工具条按钮

在ALV的工具条上增加一个自定义的按钮，单击它弹出窗口提示选择行数据内容。执行结果如图

单击自定义按钮后输出如图

程序处理流程的说明：
定义ALV控件相关事件、接口和实现方法等，主要定义以下事件。
(1)ALV控件的工具条处理事件，定义了新按钮和功能码；
(2)ALV控件的功能码处理事件，定义用户单击按钮产生的功能码事件。

主程序代码如下：

REPORT  YTEST20160620002.

INCLUDE <ICON>.
CLASS LCL_EVENT_RECEIVER DEFINITION DEFERRED.

DATA: OK_CODE TYPE SY-UCOMM,
      SAVE_OK TYPE SY-UCOMM.

DATA EVENT_RECEIVER TYPE REF TO LCL_EVENT_RECEIVER.

DATA: WA_SCHOOL TYPE TABLE OF YTJAYSCHOOL,
      A_SCHOOL LIKE YTJAYSCHOOL.

SELECT * INTO TABLE WA_SCHOOL FROM YTJAYSCHOOL.

DATA:WA_CONTAINER TYPE SCRFNAME VALUE 'ALVDATA',
     ALV_GRID TYPE REF TO CL_GUI_ALV_GRID,
     WA_CUSTOM_CONTAINER TYPE REF TO CL_GUI_CUSTOM_CONTAINER.

CALL SCREEN 100.

CLASS LCL_EVENT_RECEIVER DEFINITION.
  PUBLIC SECTION.
    METHODS:
      HANDLE_TOOLBAR
        FOR EVENT TOOLBAR OF CL_GUI_ALV_GRID
          IMPORTING E_OBJECT E_INTERACTIVE,

      HANDLE_USER_COMMAND
        FOR EVENT USER_COMMAND OF CL_GUI_ALV_GRID
          IMPORTING E_UCOMM.
ENDCLASS.

CLASS LCL_EVENT_RECEIVER IMPLEMENTATION.
  METHOD HANDLE_TOOLBAR.
    DATA:LS_TOOLBAR TYPE STB_BUTTON.
    CLEAR LS_TOOLBAR-BUTN_TYPE.
    APPEND LS_TOOLBAR TO E_OBJECT->MT_TOOLBAR.
    CLEAR LS_TOOLBAR.

    MOVE 'SHOW_DETA' TO LS_TOOLBAR-FUNCTION.

    MOVE ICON_PPE_VNODE TO LS_TOOLBAR-ICON.
    MOVE '学校明细显示' TO LS_TOOLBAR-QUICKINFO.
    MOVE '学校明细显示' TO LS_TOOLBAR-TEXT.
    MOVE '' TO LS_TOOLBAR-DISABLED.
    APPEND LS_TOOLBAR TO E_OBJECT->MT_TOOLBAR.
  ENDMETHOD.

  METHOD HANDLE_USER_COMMAND.
    DATA:LT_ROWS TYPE LVC_T_ROW.
    CASE E_UCOMM.
      WHEN 'SHOW_DETA'.
        CALL METHOD ALV_GRID->GET_SELECTED_ROWS
          IMPORTING
            ET_INDEX_ROWS = LT_ROWS.
        CALL METHOD CL_GUI_CFW=>FLUSH.
        IF SY-SUBRC = 0.
          MESSAGE S005(YMESS) WITH '已选择行'.
          PERFORM MESSDETA TABLES LT_ROWS.
        ENDIF.
    ENDCASE.
  ENDMETHOD.
ENDCLASS.

MODULE STATUS_0100 OUTPUT.
  SET PF-STATUS 'STATUS1'.
  IF WA_CUSTOM_CONTAINER IS INITIAL.
    CREATE OBJECT WA_CUSTOM_CONTAINER
      EXPORTING CONTAINER_NAME = WA_CONTAINER.
    CREATE OBJECT ALV_GRID
      EXPORTING I_PARENT = WA_CUSTOM_CONTAINER.

    CALL METHOD ALV_GRID->SET_TABLE_FOR_FIRST_DISPLAY
      EXPORTING
        I_STRUCTURE_NAME = 'YTJAYSCHOOL'
      CHANGING
        IT_OUTTAB = WA_SCHOOL.

    CREATE OBJECT EVENT_RECEIVER.
    SET HANDLER EVENT_RECEIVER->HANDLE_USER_COMMAND FOR ALV_GRID.

    SET HANDLER EVENT_RECEIVER->HANDLE_TOOLBAR FOR ALV_GRID.
    CALL METHOD ALV_GRID->SET_TOOLBAR_INTERACTIVE.
   ENDIF.
ENDMODULE.

MODULE USER_COMMAND_0100 INPUT.
  SAVE_OK = OK_CODE.
  CLEAR OK_CODE.
  CASE SAVE_OK.
    WHEN 'CANCEL'.
      LEAVE PROGRAM.
  ENDCASE.
ENDMODULE.

FORM MESSDETA TABLES P_ET_INDEX_ROWS STRUCTURE LVC_S_ROW.
  DATA:LS_SELECTED_LINE LIKE LVC_S_ROW,
       LF_ROW_INDEX TYPE LVC_INDEX.
  DATA:S1(200) TYPE C,
       S2(3) TYPE C.
  S2 = '-'.

  LOOP AT P_ET_INDEX_ROWS INTO LS_SELECTED_LINE.
    LF_ROW_INDEX = LS_SELECTED_LINE-INDEX.
    READ TABLE WA_SCHOOL INDEX LF_ROW_INDEX INTO A_SCHOOL.
    S1 = '选择行内容'.
    CONCATENATE S1 A_SCHOOL-YSH_NAME A_SCHOOL-YSH_ADDR
                INTO S1 SEPARATED BY S2.
    MESSAGE I005(YMESS) WITH S1.
  ENDLOOP.
ENDFORM.

5、处理ALV双击事件

主程序代码如下

REPORT  YTEST20160620003.
*功能码返回值
DATA:OK_CODE TYPE SY-UCOMM,
     SAVE_OK TYPE SY-UCOMM.
*定义内表,变量需要传递，不加HEADER LINE
DATA WA_SCHOOL TYPE TABLE OF YTJAYSCHOOL.
*内表赋值
SELECT * INTO TABLE WA_SCHOOL FROM YTJAYSCHOOL.
*定义窗口定制控件，定义ALV对象
DATA:WA_CONTAINER TYPE SCRFNAME VALUE 'ALVDATA',
     ALV_GRID TYPE REF TO CL_GUI_ALV_GRID,
     WA_CUSTOM_CONTAINER TYPE REF TO CL_GUI_CUSTOM_CONTAINER.
*定义事件类型
CLASS LCL_EVENT_RECEIVER DEFINITION DEFERRED.
*定义事件
DATA EVENT_RECEIVER TYPE REF TO LCL_EVENT_RECEIVER.
*直接调用窗口
CALL SCREEN 100.

CLASS LCL_EVENT_RECEIVER DEFINITION.
  PUBLIC SECTION.
    METHODS:
    HANDLE_DOUBLE_CLICK
      FOR EVENT DOUBLE_CLICK OF CL_GUI_ALV_GRID
        IMPORTING E_ROW E_COLUMN.
ENDCLASS.

CLASS LCL_EVENT_RECEIVER IMPLEMENTATION.
  METHOD HANDLE_DOUBLE_CLICK.
    DATA:LI_SCHOOL LIKE LINE OF WA_SCHOOL.
    READ TABLE WA_SCHOOL INDEX E_ROW-INDEX INTO LI_SCHOOL.
*将行列等信息合并到字符串
    DATA:S1(100) TYPE C.
*    CONCATENATE '行:' E_ROW-INDEX '列名:' E_COLUMN-FIELDNAME INTO S1.
    CONCATENATE S1 'SCHOOL NAME:' LI_SCHOOL-YSH_NAME INTO S1.
    CONCATENATE S1 'SCHOOL ADDR:' LI_SCHOOL-YSH_ADDR INTO S1.
*在状态条显示单击的行与列信息
    MESSAGE S208(00) WITH S1.
  ENDMETHOD.
ENDCLASS.

MODULE STATUS_0100 OUTPUT.
  SET PF-STATUS 'STATUS1'.
*如果窗口还没有创建ALV对象则创建它
  IF WA_CUSTOM_CONTAINER IS INITIAL.
    CREATE OBJECT WA_CUSTOM_CONTAINER
      EXPORTING CONTAINER_NAME = WA_CONTAINER.
    CREATE OBJECT ALV_GRID
      EXPORTING I_PARENT = WA_CUSTOM_CONTAINER.
    CALL METHOD ALV_GRID->SET_TABLE_FOR_FIRST_DISPLAY
      EXPORTING
        I_STRUCTURE_NAME = 'YTJAYSCHOOL'
      CHANGING
        IT_OUTTAB = WA_SCHOOL.
*ALV对象分配双击事件
    CREATE OBJECT EVENT_RECEIVER.
    SET HANDLER EVENT_RECEIVER->HANDLE_DOUBLE_CLICK
    FOR ALV_GRID.
  ENDIF.
ENDMODULE.

MODULE USER_COMMAND_0100 INPUT.
  SAVE_OK = OK_CODE.
  CLEAR OK_CODE.
  CASE SAVE_OK.
    WHEN 'CANCEL'.
      LEAVE PROGRAM.
  ENDCASE.
ENDMODULE.

输出界面如下图，双击时，注意状态条显示的信息：学校名称、学校地址的值。

6、通过ALV控件编辑内表和数据库更新

处理过程如下：
(1)设定ALV控件可以编辑；
(2)退出屏幕时将数据更新到内表；
(3)捕捉ALV控件的数据更改信息，将ALV控件的删除行信息保存到内表中；
(4)在输出时，比较删除行和最后的内表，删除重复的行；
(5)将数据更新到数据表。

主程序代码如下：

REPORT  YTEST20160620004.

DATA:OK_CODE TYPE SY-UCOMM,
     SAVE_OK TYPE SY-UCOMM.
TABLES YTJAYSCHOOL.

DATA LS_SCHOOL TYPE YTJAYSCHOOL.

DATA WA_SCHOOL TYPE TABLE OF YTJAYSCHOOL.

DATA WADEL_SCHOOL TYPE TABLE OF YTJAYSCHOOL.

SELECT * INTO TABLE WA_SCHOOL FROM YTJAYSCHOOL.

DATA:WA_CONTAINER TYPE SCRFNAME VALUE 'ALVDATA',
     ALV_GRID TYPE REF TO CL_GUI_ALV_GRID,
     WA_CUSTOM_CONTAINER TYPE REF TO CL_GUI_CUSTOM_CONTAINER.

DATA WA_LAYOUT TYPE LVC_S_LAYO.
WA_LAYOUT-EDIT = 'X'.
CLASS LCL_EVENT_RECEIVER DEFINITION DEFERRED.

DATA EVENT_RECEIVER TYPE REF TO LCL_EVENT_RECEIVER.

CLASS LCL_EVENT_RECEIVER DEFINITION.
  PUBLIC SECTION.
    TYPES: DEL_ROWS TYPE STANDARD TABLE OF YTJAYSCHOOL.
    DATA: DDEL_ROWS TYPE STANDARD TABLE OF YTJAYSCHOOL.

    METHODS:
    HANDLE_DATA_CHANGED
      FOR EVENT DATA_CHANGED OF CL_GUI_ALV_GRID
        IMPORTING ER_DATA_CHANGED.

    METHODS:
    UPDATE_DELTA_TABLES
      IMPORTING
        PR_DATA_CHANGED TYPE REF TO CL_ALV_CHANGED_DATA_PROTOCOL.

    METHODS:
    GET_DELETED_ROWS
    EXPORTING
      DELETED_ROWS TYPE DEL_ROWS.
ENDCLASS.

CLASS LCL_EVENT_RECEIVER IMPLEMENTATION.
  METHOD HANDLE_DATA_CHANGED.
    CALL METHOD UPDATE_DELTA_TABLES( ER_DATA_CHANGED ).
  ENDMETHOD.

  METHOD UPDATE_DELTA_TABLES.
    DATA: L_DEL_ROW  TYPE LVC_S_MOCE.

    LOOP AT PR_DATA_CHANGED->MT_DELETED_ROWS INTO L_DEL_ROW.
      READ TABLE WA_SCHOOL INTO LS_SCHOOL INDEX L_DEL_ROW-ROW_ID.
      IF SY-SUBRC NE 0.
        MESSAGE E208(00) WITH '处理错误'.
      ELSE.
        APPEND LS_SCHOOL TO DDEL_ROWS.
      ENDIF.
    ENDLOOP.
  ENDMETHOD.

  METHOD GET_DELETED_ROWS.
    DELETED_ROWS = ME->DDEL_ROWS.
  ENDMETHOD.
ENDCLASS.

START-OF-SELECTION.
  CALL SCREEN 100.
  WRITE / '---------------删除的内表记录---------------'.
  WRITE / '____________________________________________'.
  CALL METHOD EVENT_RECEIVER->GET_DELETED_ROWS
    IMPORTING
      DELETED_ROWS = WADEL_SCHOOL.

  LOOP AT WADEL_SCHOOL INTO YTJAYSCHOOL.
    WRITE:/ YTJAYSCHOOL-YSH_ID,YTJAYSCHOOL-YSH_NAME,YTJAYSCHOOL-YSH_ADDR.
  ENDLOOP.

  WRITE:/ '---------------更新后的内表记录---------------：'.
  WRITE:/ '____________________________________________'.
  LOOP AT WA_SCHOOL INTO YTJAYSCHOOL.
    WRITE:/ YTJAYSCHOOL-YSH_ID,YTJAYSCHOOL-YSH_NAME,YTJAYSCHOOL-YSH_ADDR.
  ENDLOOP.

*  WHEN 'SAVE'.
*    MODIFY YTJAYSCHOOL FROM TABLE WA_SCHOOL.
*    IF SY-SUBRC NE 0.
*      MESSAGE I005(YMESS) WITH '更新数据错误'.
*      EXIT.
*    ELSE.
*      MESSAGE I005(YMESS) WITH '更新数据OK'.
*    ENDIF.
*
*    DELETE YTJAYSCHOOL FROM TABLE DELA_SCHOOL.
*    IF SY_SUBRC NE 0.
*      MESSAGE I005(YMESS) WITH '更新数据错误'.
*    ELSE.
*      MESSAGE I005(YMESS) WITH '更新数据OK'.
*    ENDIF.


END-OF-SELECTION.

MODULE STATUS_0100 OUTPUT.
  SET PF-STATUS 'STATUS1'.
  IF WA_CUSTOM_CONTAINER IS INITIAL.
    CREATE OBJECT WA_CUSTOM_CONTAINER
    EXPORTING CONTAINER_NAME = WA_CONTAINER.
    CREATE OBJECT ALV_GRID
      EXPORTING I_PARENT = WA_CUSTOM_CONTAINER.

    CREATE OBJECT EVENT_RECEIVER.
    SET HANDLER EVENT_RECEIVER->HANDLE_DATA_CHANGED FOR ALV_GRID.

    CALL METHOD ALV_GRID->SET_TABLE_FOR_FIRST_DISPLAY
      EXPORTING
        I_STRUCTURE_NAME = 'YTJAYSCHOOL'
        IS_LAYOUT = WA_LAYOUT
      CHANGING
        IT_OUTTAB = WA_SCHOOL.
    ENDIF.
ENDMODULE.

MODULE USER_COMMAND_0100 INPUT.
  SAVE_OK = OK_CODE.
  CLEAR OK_CODE.
  CASE SAVE_OK.
    WHEN 'CANCEL'.
      DATA L_RET VALUE 'X'.
      CALL METHOD ALV_GRID->CHECK_CHANGED_DATA
        IMPORTING
          E_VALID = L_RET.
      LEAVE TO SCREEN 0.
  ENDCASE.
ENDMODULE.

输出结果：

删除最后两行数据，点击“CANCEL"按钮，结果如下：

7、ALV Tree的使用

在SAP业务系统中，大量地使用了ALV Tree对象，该对象在表格基础上对同类数据进行归类，并对各分类能进行数据汇总。如图

以学校表(YTJAYSCHOOL)为例：
(1)以城市、学校分类；
(2)在右屏输出学校名称、学校地址，并控制其输出长度。
处理过程：
(1)建立程序和屏幕，在屏幕上建立定制控制对象，定义好逻辑流；
(2)建立好PAI、PBO事件；
(3)在PAI中定义建立定制控制对象，并建立ALV Tree对象；
(4)建立ALV Tree对象的标题；
(5)建立右屏输出字段清单、字段长度等内容；
(6)建立Tree分类字段清单及输出先后顺序；
(7)显示ALV Tree对象。

主程序代码：

REPORT  YTEST20160621001.
DATA: OK_CODE TYPE SY-UCOMM,
      SAVE_OK TYPE SY-UCOMM.

DATA: GB_FIELDCAT TYPE LVC_T_FCAT.
DATA: GB_SORTFLD TYPE LVC_T_SORT.

DATA WA_SCHOOL TYPE TABLE OF YTJAYSCHOOL.

SELECT * INTO TABLE WA_SCHOOL FROM YTJAYSCHOOL.

DATA: WA_CONTAINER TYPE SCRFNAME VALUE 'ALVDATA',
      ALV_GRID TYPE REF TO CL_GUI_ALV_TREE_SIMPLE,
      WA_CUSTOM_CONTAINER TYPE REF TO CL_GUI_CUSTOM_CONTAINER.

CALL SCREEN 100.

MODULE STATUS_0100 OUTPUT.
  SET PF-STATUS 'STATUS1'.
  IF WA_CUSTOM_CONTAINER IS INITIAL.
    DATA LS_LIST_COMM TYPE SLIS_T_LISTHEADER.
    DATA LS_ALIST_COMM TYPE SLIS_LISTHEADER.
    LS_ALIST_COMM-TYP = 'H'.
    LS_ALIST_COMM-INFO = 'MY ALV TREE Testing'.
    APPEND LS_ALIST_COMM TO LS_LIST_COMM.

    PERFORM BLDCAT.
    PERFORM BLDSORTFLD.

    CREATE OBJECT WA_CUSTOM_CONTAINER
      EXPORTING CONTAINER_NAME = WA_CONTAINER.

    CREATE OBJECT ALV_GRID
      EXPORTING I_PARENT = WA_CUSTOM_CONTAINER.

    CALL METHOD ALV_GRID->SET_TABLE_FOR_FIRST_DISPLAY
      EXPORTING
        IT_LIST_COMMENTARY = LS_LIST_COMM
        I_STRUCTURE_NAME = 'YTJAYSCHOOL'
      CHANGING
        IT_SORT = GB_SORTFLD
        IT_FIELDCATALOG = GB_FIELDCAT
        IT_OUTTAB = WA_SCHOOL.

    CALL METHOD ALV_GRID->EXPAND_TREE
      EXPORTING
        I_LEVEL = 1.
  ENDIF.
ENDMODULE.

MODULE USER_COMMAND_0100 INPUT.
  SAVE_OK = OK_CODE.
  CLEAR OK_CODE.
  CASE SAVE_OK.
    WHEN 'CANCEL'.
      LEAVE PROGRAM.
  ENDCASE.
ENDMODULE.

FORM BLDCAT.
  CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
    EXPORTING
      I_STRUCTURE_NAME = 'YTJAYSCHOOL'
    CHANGING
      CT_FIELDCAT = GB_FIELDCAT.

  DATA LS_FLDCAT TYPE LVC_S_FCAT.
  LOOP AT GB_FIELDCAT INTO LS_FLDCAT.
    CASE LS_FLDCAT-FIELDNAME.
      WHEN 'YSH_NAME' OR 'YSH_ADDR'.
        LS_FLDCAT-OUTPUTLEN = 15.
      WHEN OTHERS.
        LS_FLDCAT-NO_OUT = 'X'.
    ENDCASE.

    MODIFY GB_FIELDCAT FROM LS_FLDCAT.
  ENDLOOP.
ENDFORM.

FORM BLDSORTFLD.
  DATA LS_SORTFLD TYPE LVC_S_SORT.

  LS_SORTFLD-SPOS = 1.
  LS_SORTFLD-FIELDNAME = 'YCT_ID'.
  LS_SORTFLD-UP = 'X'.
  LS_SORTFLD-SUBTOT = 'X'.
  APPEND LS_SORTFLD TO GB_SORTFLD.

  LS_SORTFLD-SPOS = 2.
  LS_SORTFLD-FIELDNAME = 'YSH_ID'.
  LS_SORTFLD-UP = 'X'.
  LS_SORTFLD-SUBTOT = 'X'.
  APPEND LS_SORTFLD TO GB_SORTFLD.

*  LS_SORTFLD-SPOS = 3.
*  LS_SORTFLD-FIELDNAME = 'YSH_NAME'.
*  LS_SORTFLD-UP = 'X'.
*  LS_SORTFLD-SUBTOT = 'X'.
*  APPEND LS_SORTFLD TO GB_SORTFLD.
*
*  LS_SORTFLD-SPOS = 4.
*  LS_SORTFLD-FIELDNAME = 'YSH_ADDR'.
*  LS_SORTFLD-UP = 'X'.
*  LS_SORTFLD-SUBTOT = 'X'.
*  APPEND LS_SORTFLD TO GB_SORTFLD.
ENDFORM.

ABAP ALV控件的使用

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原文地址：http://blog.csdn.net/jay_1989/article/details/51719575

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