How to display the listbox values based on the other parameter in the selection screen

[Former Member]

Hi  Experts,

I have to change the listbox values based on the other parameters value in the selection screen.like in my report there is two parameters in the selection screen as p_whr ( parameter) and p_query (Parameter as list box).When we change the value of p_whr then the logic should trigger automatically and get display the corresponding values in the list box

Could you please help what even I have to use to changes the listbox values based on the other parameter or share any examples for the same scenario.

Thanks in advance

Krishna

[Former Member]

Hi Ram,

By using AT SELECTION-SCREEN ON VALUE REQUEST event it is possible. You can change p_whr

value by clicking on F4 function key. Based on p_whr vale you can change p_query list box values.

An SAP Consultant: ABAP - F4 help - DYNP_VALUES_READ

http://www.saptechnical.com/Tutorials/ABAP/F4/Page2.htm

Hopes it helps you.

Thanks,

Ashok.

[gabmarian]

Hi Krishna,

Here is a code piece for it:

Listbox parameter P_LB is filled up with values from 1 up to X, where X is the value what you specified in other parameter P_NUM.

The important thing is setting MODIF ID for P_NUM, so in case of change selscreen PAI (AT SELECTION SCREEN event), an afterwards PBO will be triggered.

Then, in AT SELECTION SCREEN OUTPUT event, you can use  FM VRM_SET_VALUES to fill the listbox with the proper values.

DATA:
  gt_status_values TYPE TABLE OF vrm_value,
  gs_status_value TYPE vrm_value.

PARAMETERS:

  p_num TYPE i MODIF ID mod,
  p_lb  AS LISTBOX VISIBLE LENGTH 10.

AT SELECTION-SCREEN OUTPUT.

  CLEAR gt_status_values.

  DO p_num TIMES.

    gs_status_value-key  = sy-index.
    gs_status_value-text = sy-index.

    APPEND gs_status_value TO gt_status_values.

  ENDDO.


  CALL FUNCTION 'VRM_SET_VALUES'
    EXPORTING
      id     = 'P_LB'
      values = gt_status_values
    EXCEPTIONS
      OTHERS = 1.



AT SELECTION-SCREEN.