Dynamic serch help in TMG

Question

Hi All,
I have creatred one table maintaince generator for the table with 2 fields.
My equirement is to have dynamic F4 help on the second field.
Dynamic means the values displayed in the F4 help should be depending on the values in the first field.
for this in tmg modification/mainten screens i created on POV and module validate for second fiel. in
that moudule  i call fn dynpro_value_read to get the value of first field. its geting empty value.
can any body help me

Answer 1

Hi Thirumala,
Based on what you had created the TMG, means based on the table or a maintenance view. If you had created a maintenance view, then you should be calling the POV based on this field. For example if your table is ZTAB and your maintainence view is ZV_TAB the call from POV should be as follows:
Case-1:
FIELD ztab-field1 MODULE f4_field1.         "If TMG is based on table
Case-2:
FIELD zv_tab-field1 MODULE f4_field1.      "If TMG is based on maintenance view
Then within the module f4_field1, you should be calling the DYNP_VALUES_READ as follows.
Case-1:
wa_dynpread-fieldname = 'ZTAB-FIELD1'.
APPEND wa_dynpread TO gt_dynpread.
Case-2:
wa_dynpread-fieldname = 'ZV_TAB-FIELD1'.
APPEND wa_dynpread TO gt_dynpread.
CALL FUNCTION 'DYNP_VALUES_READ'
     EXPORTING
       dyname               = sy-repid
       dynumb               = sy-dynnr
     TABLES
       dynpfields           = gt_dynpread
     EXCEPTIONS
       invalid_abapworkarea = 1
       invalid_dynprofield  = 2
       invalid_dynproname   = 3
       invalid_dynpronummer = 4
       invalid_request      = 5
       no_fielddescription  = 6
       invalid_parameter    = 7
       undefind_error       = 8
       double_conversion    = 9
       stepl_not_found      = 10
       OTHERS               = 11.
Now make your selection from the table based on the value that you got in gt_dynpread into table lt_f4_help which will contain value for field2.
IF gt_dynpread IS NOT INITIAL.
     READ TABLE gt_dynpread INTO wa_dynpread INDEX 1.
     "Make your selection into lt_f4_help
      CALL FUNCTION 'F4IF_INT_TABLE_VALUE_REQUEST'
             EXPORTING
               retfield        = 'FIELD2'
               dynpprog        = sy-repid
               dynpnr          = sy-dynnr
               dynprofield     = 'ZV_TAB-FIELD2' "In case maintenance view
               window_title    = text-004
               value_org       = 'S'
             TABLES
               value_tab       = gt_versn_hlp
             EXCEPTIONS
               parameter_error = 1
               no_values_found = 2
               OTHERS          = 3.
           IF sy-subrc <> 0.
             "Implement suitable error handling here
           ENDIF.
ENDIF.
Hope this will solve your issue.
Regards,
Abijith