ABAP - SALV教程05 添加页眉和页脚-编程知识

先看看效果叭
CL_SALV_TABLE提供了SET_TOP_OF_LIST方法设置页眉显示和SET_TOP_OF_LIST_PRINT方法设置页眉打印来实现添加页眉的目的。
CL_SALV_TABLE提供了SET_END_OF_LIST方法设置页脚显示和SET_END_OF_LIST_PRINT方法设置页脚打印来实现添加页脚的目的。
这个四个方法的传入参数为CL_SALV_FORM_LAYOUT_GRID类型，这是个类。
实现步骤

定义两个私有方法；SET_TOPPAGE:添加页眉，SET_ENDPAGE:添加页脚

  PRIVATE SECTION.METHODS:set_toppage CHANGING co_alv TYPE REF TO cl_salv_table.METHODS:set_endpage CHANGING co_alv TYPE REF TO cl_salv_table.

  METHOD set_toppage.DATA: lo_h_label TYPE REF TO cl_salv_form_label,lo_h_flow  TYPE REF TO cl_salv_form_layout_flow.DATA(lo_header) = NEW cl_salv_form_layout_grid( ).*   通过Row 和 column字段定位在top of page的文本输出位置
*   粗体 第一行第一列lo_h_label = lo_header->create_label( row = 1 column = 1 ).lo_h_label->set_text( 'Sale Orders of Report' ).*   第二行第一列lo_h_flow = lo_header->create_flow( row = 2  column = 1 ).lo_h_flow->create_text( text = 'Create By:' && sy-uname ).*   第三行第一列lo_h_flow = lo_header->create_flow( row = 3  column = 1 ).lo_h_flow->create_text( text = 'Number of Records in the output' ).*   第三行第二列lo_h_flow = lo_header->create_flow( row = 3  column = 2 ).lo_h_flow->create_text( text = '20' ).*   页眉显示co_alv->set_top_of_list( lo_header ).
*   页眉打印co_alv->set_top_of_list_print( lo_header ).ENDMETHOD.METHOD set_endpage.DATA: lo_f_label TYPE REF TO cl_salv_form_label,lo_f_flow  TYPE REF TO cl_salv_form_layout_flow.DATA(lo_footer) = NEW cl_salv_form_layout_grid( ).*   通过Row 和 column字段定位在top of page的文本输出位置
*   粗体 第一行第一列lo_f_label = lo_footer->create_label( row = 1 column = 1 ).lo_f_label->set_text( 'Bilibili University' ).*   第二行第一列lo_f_flow = lo_footer->create_flow( row = 2  column = 1 ).lo_f_flow->create_text( text = 'Date:' && sy-datum ).*lo_f_flow = lo_footer->create_flow( row = 3  column = 1 ).lo_f_flow->create_text( text = 'Footer number' ).
*lo_f_flow = lo_footer->create_flow( row = 3  column = 2 ).lo_f_flow->create_text( text = 1 ).*   页眉打印co_alv->set_end_of_list( lo_footer ).
*   页脚打印co_alv->set_end_of_list_print( lo_footer ).ENDMETHOD.

同样的也是在创建SALV实例对象后调用方法

    TRY.cl_salv_table=>factory(IMPORTINGr_salv_table = mo_salvCHANGINGt_table      = mt_data ).CATCH cx_salv_msg INTO DATA(lx_msg).ENDTRY.me->set_toppage( CHANGING co_alv = mo_salv ).me->set_endpage( CHANGING co_alv = mo_salv ).

完整代码

CLASS lcl_model DEFINITION.PUBLIC SECTION.TYPES:BEGIN OF TY_dATA,vbeln TYPE vbak-vbeln,erdat TYPE erdat,erzet TYPE erzet,ernam TYPE ernam,auart TYPE auart.TYPES:END  OF ty_data.DATA mt_data TYPE TABLE OF ty_data.DATA mo_salv TYPE REF TO cl_salv_table."获取数据的方法METHODS get_data."展示SALV的方法METHODS alv_show.PRIVATE SECTION.METHODS:set_status  CHANGING co_alv TYPE REF TO cl_salv_table.METHODS:set_toppage CHANGING co_alv TYPE REF TO cl_salv_table.METHODS:set_endpage CHANGING co_alv TYPE REF TO cl_salv_table.ENDCLASS.CLASS lcl_model IMPLEMENTATION.METHOD get_data.SELECT vbeln erdat erzet ernam auartINTO TABLE mt_dataFROM vbakUP TO 20 ROWS.ENDMETHOD.METHOD alv_show.TRY.cl_salv_table=>factory(IMPORTINGr_salv_table = mo_salvCHANGINGt_table      = mt_data ).CATCH cx_salv_msg INTO DATA(lx_msg).ENDTRY.me->set_status( CHANGING co_alv = mo_salv ).me->set_toppage( CHANGING co_alv = mo_salv ).me->set_endpage( CHANGING co_alv = mo_salv ).mo_salv->display( ).ENDMETHOD.METHOD set_status.DATA(lo_functions) = co_alv->get_functions( )."cl_salv_functions_list类型的实例对象的添加状态方法lo_functions->set_all( abap_true )."lo_functions->set_default( abap_true ).ENDMETHOD.METHOD set_toppage.DATA: lo_h_label TYPE REF TO cl_salv_form_label,lo_h_flow  TYPE REF TO cl_salv_form_layout_flow.DATA(lo_header) = NEW cl_salv_form_layout_grid( ).*   通过Row 和 column字段定位在top of page的文本输出位置
*   粗体 第一行第一列lo_h_label = lo_header->create_label( row = 1 column = 1 ).lo_h_label->set_text( 'Sale Orders of Report' ).*   第二行第一列lo_h_flow = lo_header->create_flow( row = 2  column = 1 ).lo_h_flow->create_text( text = 'Create By:' && sy-uname ).*   第三行第一列lo_h_flow = lo_header->create_flow( row = 3  column = 1 ).lo_h_flow->create_text( text = 'Number of Records in the output' ).*   第三行第二列lo_h_flow = lo_header->create_flow( row = 3  column = 2 ).lo_h_flow->create_text( text = '20' ).
*
*   页眉显示co_alv->set_top_of_list( lo_header ).
*
*   页眉打印co_alv->set_top_of_list_print( lo_header ).ENDMETHOD.METHOD set_endpage.DATA: lo_f_label TYPE REF TO cl_salv_form_label,lo_f_flow  TYPE REF TO cl_salv_form_layout_flow.DATA(lo_footer) = NEW cl_salv_form_layout_grid( ).*   通过Row 和 column字段定位在top of page的文本输出位置
*   粗体 第一行第一列lo_f_label = lo_footer->create_label( row = 1 column = 1 ).lo_f_label->set_text( 'Bilibili University' ).*   第二行第一列lo_f_flow = lo_footer->create_flow( row = 2  column = 1 ).lo_f_flow->create_text( text = 'Date:' && sy-datum ).*lo_f_flow = lo_footer->create_flow( row = 3  column = 1 ).lo_f_flow->create_text( text = 'Footer number' ).
*lo_f_flow = lo_footer->create_flow( row = 3  column = 2 ).lo_f_flow->create_text( text = 1 ).co_alv->set_end_of_list( lo_footer ).
*   页脚打印co_alv->set_end_of_list_print( lo_footer ).ENDMETHOD.ENDCLASS.START-OF-SELECTION.DATA(lo_model) = NEW lcl_model( ).lo_model->get_data( ).lo_model->alv_show( ).