SAP-导航VA03和ME23N

 SAP ABAP中标准程序是通过下面的接口导航到VA03显示销售订单,ME23N显示采购订单：

 if not lf_destination is initial.
      call function 'SD_SALESDOCUMENT_DISPLAY'
        destination
          lf_destination
        exporting
          i_vbeln            = lf_vgbel
          i_vbtyp_l          = IF_SD_DOC_CATEGORY=>PURCHASE_ORDER
        exceptions
          no_authority       = 1
          others             = 2.

      if sy-subrc ne 0.
        message id sy-msgid type sy-msgty number sy-msgno
                with sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
      endif.
    endif.
  else.
    call function 'ME_DISPLAY_PURCHASE_DOCUMENT'
         exporting
              i_ebeln              = lf_vgbel
              i_enjoy              = 'X'
         exceptions
              not_found            = 1
              no_authority         = 2
              invalid_call         = 3
              preview_not_possible = 4
              others               = 5.
    if sy-subrc <> 0.
      message id sy-msgid type 'S' number sy-msgno
              with sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
      exit.
    endif.
  endif.