SALV 页头和页尾设置

*$*$*.....CODE_ADD_1 - Begin..................................1..*$*$*
  PRIVATE SECTION.
*Set Top of page
    METHODS:
      set_top_of_page
        CHANGING
          co_alv TYPE REF TO cl_salv_table.
*Set End of page
    METHODS:
      set_end_of_page
        CHANGING
          co_alv TYPE REF TO cl_salv_table.
*$*$*.....CODE_ADD_1 - End....................................1..*$*$*

*$*$*.....CODE_ADD_2 - Begin..................................2..*$*$*
*Calling the top of page method
    CALL METHOD me->set_top_of_page
      CHANGING
        co_alv = o_alv.
*Calling the End of Page method
    CALL METHOD me->set_end_of_page
      CHANGING
        co_alv = o_alv.
*$*$*.....CODE_ADD_2 - End....................................2..*$*$*

*$*$*.....CODE_ADD_3 - Begin..................................3..*$*$*
  METHOD set_top_of_page.
    DATA: lo_header  TYPE REF TO cl_salv_form_layout_grid,
          lo_h_label TYPE REF TO cl_salv_form_label,
          lo_h_flow  TYPE REF TO cl_salv_form_layout_flow.
*Header object
    CREATE OBJECT lo_header.
*   To create a Lable or Flow we have to specify the target row and column number
*   where we need to set up the output text.
*Information in Bold
    lo_h_label = lo_header->create_label( row = 1 column = 1 ).
    lo_h_label->set_text( 'Header in Bold' ).
*Information in tabular format
    lo_h_flow = lo_header->create_flow( row = 2  column = 1 ).
    lo_h_flow->create_text( text = 'This is text of flow' ).
    lo_h_flow = lo_header->create_flow( row = 3  column = 1 ).
    lo_h_flow->create_text( text = 'Number of Records in the output' ).
    lo_h_flow = lo_header->create_flow( row = 3  column = 2 ).
    lo_h_flow->create_text( text = 20 ).
*Set the top of list using the header for Online.
    co_alv->set_top_of_list( lo_header ).
*Set the top of list using the header for Print.
    co_alv->set_top_of_list_print( lo_header ).
  ENDMETHOD.                    "set_top_of_page"

  METHOD set_end_of_page.
    DATA: lo_footer  TYPE REF TO cl_salv_form_layout_grid,
          lo_f_label TYPE REF TO cl_salv_form_label,
          lo_f_flow  TYPE REF TO cl_salv_form_layout_flow.
*Footer object
    CREATE OBJECT lo_footer.
*Information in bold
    lo_f_label = lo_footer->create_label( row = 1 column = 1 ).
    lo_f_label->set_text( 'Footer .. here it goes' ).
*Tabular information
    lo_f_flow = lo_footer->create_flow( row = 2  column = 1 ).
    lo_f_flow->create_text( text = 'This is text of flow in footer' ).
    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 ).
*Online footer
    co_alv->set_end_of_list( lo_footer ).
*Footer in print
    co_alv->set_end_of_list_print( lo_footer ).
  ENDMETHOD.                    "set_end_of_page"
*$*$*.....CODE_ADD_3 - End....................................3..*$*$*