How to declare a header line table in class

Question

Hi Experts ;
I m writing a class.I must display a picture in class. So Im find a below code
  TYPES: BEGIN OF ZW3QUERY,
          NAME(30) TYPE C,
          VALUE(255) TYPE C,
         END OF ZW3QUERY.
  data DOCKING type ref to CL_GUI_DOCKING_CONTAINER .
  data PICTURE_CONTROL_1 type ref to CL_GUI_PICTURE .
  data:
    URL(256) TYPE C .
  data QUERY_TABLE TYPE STANDARD TABLE OF ZW3QUERY 
        INITIAL SIZE 0.
  data HTML_TABLE type W3HTML .
  data RETURN_CODE type W3PARAM-RET_CODE .
  data CONTENT_TYPE type W3PARAM-CONT_TYPE .
  data CONTENT_LENGTH type W3PARAM-CONT_LEN .
  data PIC_DATA type W3MIME .
  data PIC_SIZE type I .
  data:
    SUM(4) .
  data:
    NUM1(4) .
  data:
    NUM2(4) .
DATA: REPID LIKE SY-REPID.
  REPID = SY-REPID.
  CREATE OBJECT PICTURE_CONTROL_1
    EXPORTING
      PARENT = DOCKING.
  CHECK SY-SUBRC = 0.
  CALL METHOD PICTURE_CONTROL_1->SET_3D_BORDER
    EXPORTING
      BORDER = 5.
  CALL METHOD PICTURE_CONTROL_1->SET_DISPLAY_MODE
    EXPORTING
      DISPLAY_MODE = CL_GUI_PICTURE=>DISPLAY_MODE_STRETCH.
  CALL METHOD PICTURE_CONTROL_1->SET_POSITION
    EXPORTING
      HEIGHT = 40
      LEFT   = 5
      TOP    = 170
      WIDTH  = 90.
  IF URL IS INITIAL.
    REFRESH QUERY_TABLE.
    QUERY_TABLE-NAME  = '_OBJECT_ID'.
    QUERY_TABLE-VALUE = 'ZBOYDAKLOGO'.
    APPEND QUERY_TABLE.
but I must do header line decleration in code. an Error. Class not support this decleration.  . I m try create types but its not works.
How do I traverse not can this error
Thanks everything Regards.

Answer 1

Hi Irfan,
in ABAP-Objects you don't work with headerlines - instead you work with work-areas.
You must define a workarea for your table like that:
DATA:
  gw_query TYPE ZW3QUERY.
  gw_query-name ='_OBJECT_ID'.
  gw_query-value = 'ZBOYDAKLOGO'.
  APPEND gw_query TO query_table.
Regards.