Hi,
ok I have created the View "Streets" with one Node "streetshode" and two attirbutes, Postnumbers and streets. in the Streets attributes i have GET_V_STREET:
method GET_V_STREET.
DATA:
lt_sel_table TYPE bsp_wd_dropdown_table,
lt_STREETS TYPE TABLE OF ZPFG_GATA,
l_ref_ddlb_type TYPE REF TO cl_crm_uiu_ddlb,
ls_sel_table TYPE LINE OF bsp_wd_dropdown_table,
ls_STREETS TYPE ZPFG_GATA. "ZPFG_GATA is a database table
**** zregion table has region id, region name and country id which refers to the zcounty table
IF l_ref_ddlb_type IS NOT BOUND.
CREATE OBJECT l_ref_ddlb_type
EXPORTING
iv_source_type = cl_crm_uiu_ddlb=>if_bsp_wd_valuehelp_pldescr~source_type_table.
ENDIF.
SELECT * FROM ZPFG_GATA INTO TABLE lt_STREETS WHERE POSTNUMER = gv_postnumber.
**** In this query use your static variable that is created in view impl class which stores the current **** selected country id.
APPEND INITIAL LINE TO lt_sel_table.
LOOP AT lt_state INTO ls_STREETS.
ls_sel_table-key = ls_STREETS-HEITI_NEFNIFALL.
ls_sel_table-value = ls_STREETS-HEITI_NEFNIFALL.
APPEND ls_sel_table TO lt_sel_table.
CLEAR: ls_sel_table, ls_STREETS.
ENDLOOP.
l_ref_ddlb_type->set_selection_table( it_selection_table = lt_sel_table ).
rv_valuehelp_descriptor = l_ref_ddlb_type.
DATA:
lt_sel_table TYPE bsp_wd_dropdown_table,
lt_STREETS TYPE TABLE OF ZPFG_GATA,
l_ref_ddlb_type TYPE REF TO cl_crm_uiu_ddlb,
ls_sel_table TYPE LINE OF bsp_wd_dropdown_table,
ls_STREETS TYPE ZPFG_GATA. "zregion is a database table
**** zregion table has region id, region name and country id which refers to the zcounty table
IF l_ref_ddlb_type IS NOT BOUND.
CREATE OBJECT l_ref_ddlb_type
EXPORTING
iv_source_type = cl_crm_uiu_ddlb=>if_bsp_wd_valuehelp_pldescr~source_type_table.
ENDIF.
SELECT * FROM ZPFG_GATA INTO TABLE lt_STREETS WHERE POSTNUMER = gv_postnumber.
**** In this query use your static variable that is created in view impl class which stores the current **** selected country id.
APPEND INITIAL LINE TO lt_sel_table.
LOOP AT lt_STREETS INTO ls_STREETS.
ls_sel_table-key = ls_STREETS-HEITI_NEFNIFALL.
ls_sel_table-value = ls_STREETS-HEITI_NEFNIFALL.
APPEND ls_sel_table TO lt_sel_table.
CLEAR: ls_sel_table, ls_STREETS.
ENDLOOP.
l_ref_ddlb_type->set_selection_table( it_selection_table = lt_sel_table ).
rv_valuehelp_descriptor = l_ref_ddlb_type.
endmethod.
GET_P_STREET:
method GET_P_STREET.
CASE iv_property.
WHEN if_bsp_wd_model_setter_getter~fp_fieldtype.
rv_value = cl_bsp_dlc_view_descriptor=>field_type_picklist.
ENDCASE.
endmethod.
In the postnmumber attribute i have the GET_V_POSTUNUMBER:
method GET_V_POSTNUMBER.
DATA:
lt_sel_table TYPE bsp_wd_dropdown_table,
lt_POSTNUMBERS TYPE TABLE OF ZPFG_GATA,
l_ref_ddlb_type TYPE REF TO cl_crm_uiu_ddlb,
ls_sel_table TYPE LINE OF bsp_wd_dropdown_table,
ls_POSTNUMBERS TYPE ZPFG_GATA. "ZPFG_GATA is the database table
**** The table ZPFG_GATA has fields countryid and countryname
IF l_ref_ddlb_type IS NOT BOUND.
CREATE OBJECT l_ref_ddlb_type
EXPORTING
iv_source_type = cl_crm_uiu_ddlb=>if_bsp_wd_valuehelp_pldescr~source_type_table.
ENDIF.
SELECT * FROM ZPFG_GATA INTO TABLE lt_POSTNUMBERS.
APPEND INITIAL LINE TO lt_sel_table.
LOOP AT lt_POSTNUMBERS INTO ls_POSTNUMBERS.
ls_sel_table-key = ls_POSTNUMBERS-POSTNUMER.
ls_sel_table-value = ls_POSTNUMBERS-POSTNUMER.
APPEND ls_sel_table TO lt_sel_table.
CLEAR: ls_sel_table, ls_POSTNUMBERS.
ENDLOOP.
l_ref_ddlb_type->set_selection_table( it_selection_table = lt_sel_table ).
rv_valuehelp_descriptor = l_ref_ddlb_type.
endmethod.
GET_P_POSTUNUMBER:
method GET_P_POSTNUMBER.
CASE iv_property.
WHEN if_bsp_wd_model_setter_getter~fp_fieldtype.
rv_value = cl_bsp_dlc_view_descriptor=>field_type_picklist.
WHEN if_bsp_wd_model_setter_getter~fp_onclick.
rv_value = store_postnumber "This is the event handler
ENDCASE.
DATA:
l_ref_entity TYPE REF TO if_bol_bo_property_access.
l_ref_entity = me->typed_context->context_name->collection_wrapper->get_current( ).
IF l_ref_entity IS BOUND.
gv_postnumber = l_ref_entity->get_property_as_string( 'Postnúmer' ).
ENDIF.
endmethod.
When i save and activate i get the error:
the field "STORE_POSTNUMBER" is unknown, but there is a field with the similar name "GV_POSTNUMBER". "GV_POSTNUMBER"
I am not an ABAPer so please help me 
I have not changed some parts of the comments.
thanks for everyones help.
Lisa