reading selected value of drop down box (index)

[Former Member]

I have to read the selected value in a drop down box and then pass it on as an input to a BAPI in webdynpro ABAP.

I need to know how to read this value?

Thanks & regards,

Priyank

[Former Member]

Hi.

The lead selection is set to the actual selected element by the system.

So you just have to get the corresponding node and call get_element( ) on it.

You also can add an actionhandler to the onSelect event in order to act on user selection directly.

Hope this helps.

Cheers,

Sascha

Message was edited by:

Sascha Dingeldey

[Former Member]

Hi Sascha,

I put the following code to read the context node and to call the get_element method.

****************

DATA:

node_et_years TYPE REF TO if_wd_context_node,

elem_et_years TYPE REF TO if_wd_context_element,

stru_et_years TYPE if_viewindice=>element_et_years ,

item_year LIKE stru_et_years-year.

• navigate from <CONTEXT> to <ET_YEARS> via lead selection

node_et_years = wd_context->get_child_node( name = if_viewindice=>wdctx_et_years ).

• @TODO handle not set lead selection

IF ( node_et_years IS INITIAL ).

ENDIF.

• get element via lead selection

elem_et_years = node_et_years->get_element( ).

• @TODO handle not set lead selection

IF ( elem_et_years IS INITIAL ).

ENDIF.

• alternative access via index

• Elem_Et_Years = Node_Et_Years->get_Element( Index = 1 ).

• @TODO handle non existant child

• if ( Elem_Et_Years is initial ).

• endif.

• get single attribute

elem_et_years->get_attribute(

EXPORTING

name = `YEAR`

IMPORTING

value = item_year ).

DATA:

node_et_indices TYPE REF TO if_wd_context_node,

elem_et_indices TYPE REF TO if_wd_context_element,

stru_et_indices TYPE if_viewindice=>element_et_indices ,

item_zzindice LIKE stru_et_indices-zzindice.

• navigate from <CONTEXT> to <ET_INDICES> via lead selection

node_et_indices = wd_context->get_child_node( name = if_viewindice=>wdctx_et_indices ).

• @TODO handle not set lead selection

IF ( node_et_indices IS INITIAL ).

ENDIF.

• get element via lead selection

elem_et_indices = node_et_indices->get_element( ).

• @TODO handle not set lead selection

IF ( elem_et_indices IS INITIAL ).

ENDIF.

• alternative access via index

• Elem_Et_Indices = Node_Et_Indices->get_Element( Index = 1 ).

• @TODO handle non existant child

• if ( Elem_Et_Indices is initial ).

• endif.

• get single attribute

elem_et_indices->get_attribute(

EXPORTING

name = `ZZINDICE`

IMPORTING

value = item_zzindice ).

data : lv_year type char4,

lv_indice type char3.

lv_year = item_year.

lv_indice = item_zzindice.

**now the call to the execute_BAPI method.

wd_comp_controller->execute_z_bapi_get_indices_ite(

i_indice = lv_indice " Char3

i_year = lv_year " Char4

).

******************

After doing this, when i select something on the drop down, it is giving me a strange error.

***

The following error text was processed in the system ERD : Could not find attribute VIEW_TABLE.1.DATA.1.MEINS

The error occurred on the application server pioerp01_ERD_00 and in the work process 0 .

The termination type was: RABAX_STATE

The ABAP call stack was:

Method: IF_WD_CONTEXT_ELEMENT~GET_ATTRIBUTE of program CL_WDR_CONTEXT_ELEMENT========CP

Method: IF_WD_CONTEXT_ELEMENT~GET_ATTRIBUTE_REF of program CL_WDR_CONTEXT_ELEMENT========CP

Method: GET_ATTRIBUTE_AS_INTERNAL of program CL_WDR_DATA_CONTAINER=========CP

Method: GET_REFERENCE_FIELD of program CL_WDR_DATA_CONTAINER=========CP

Method: GET_AND_FORMAT of program CL_WDR_DATA_CONTAINER=========CP

Method: GET_ATTRIBUTE_EXTERNAL of program CL_WDR_VIEW_ELEMENT_ADAPTER===CP

Method: IF_WDR_VIEW_ELEMENT_ADAPTER~SET_CONTENT of program /1WDA/L0STANDARD==============CP

Method: IF_WDR_VIEW_ELEMENT_ADAPTER~SET_CONTENT of program /1WDA/L3STANDARD==============CP

Method: IF_WDR_VIEW_ELEMENT_ADAPTER~SET_CONTENT of program /1WDA/L3STANDARD==============CP

Method: IF_WDR_VIEW_ELEMENT_ADAPTER~SET_CONTENT of program /1WDA/L3STANDARD==============CP

***

I am nowhere using any attribute MEINS in my application and nor is there any view by the name VIEW_TABLE.

is there something i can do to resolve this???

[Former Member]

Hi Priyank,

As far as my understanding is concerned you are using a dropdown box and then trying to retrieve 2 information, i mean field values, using LeadSelection but then point is that at a time only one entry would be selected so the other remains blank henc you get a null point reference in one of the cases.

So I would suggest you try to retireve only one of the information, the one that you are selecting on screen, and then execute your code.. it should work fine as per my understanding..

Hope this helps.

Regards,

Anoop

[Former Member]

Hi Priyank.

How is the structure of the context element you use for the drop down box?

could you post the short dump from ST22?

Cheers,

Sascha

[Former Member]

Thanks Guys for your answers!!

I figured it out. The problem was that my z-table had problems with a reference unit field for a quantity field. The error disappears when i correct it.

Priyank