I implemented a WebDynpro Component, which has an input field for COUNTRY and a select-option (component WDR_SELECT_OPTIONS) for VENDOR. This vendor is depending on the selected country.
So I implemented a customer value help (based on interface IWD_VALUE_HELP), which only displays the vendors of the selected country. This works pretty fine as long as I use this value help component for statically defined input fields, where I have set the attributes of the according context attributes "Input Help Mode" (="Freely Programmed") and "Input Help Component Usage".
The select-option is created at runtime as follows within the hook method WDDOINIT:
DATA: lr_usage TYPE REF TO if_wd_component_usage, lr_if_controller TYPE REF TO iwci_wdr_select_options, lt_range TYPE REF TO data.
* initialize select option component
lr_usage = wd_this->wd_cpuse_vco_selectoption( ). IF lr_usage->has_active_component( ) IS INITIAL. lr_usage->create_component( ). ENDIF. "IF lr_usage->has_active_component( ) IS INITIAL
* initialize selection screen
lr_if_controller = wd_this->wd_cpifc_vco_selectoption( ). wd_this->mr_selopt = lr_if_controller->init_selection_screen( ). wd_this->mr_selopt->set_global_options( i_display_btn_cancel = abap_false i_display_btn_check = abap_false i_display_btn_reset = abap_true i_display_btn_execute = abap_false ). lt_range = wd_this->mr_selopt->create_range_table( i_typename = '/BIC/OIBI_VENDOR' ). wd_this->mr_selopt->add_selection_field( i_id = 'VENDOR' it_result = lt_range i_description = 'Vendor'
*{"experimental i_value_help_type = if_wd_value_help_handler=>co_prefix_appldev i_value_help_id = 'SH_VENDOR'
*}"experimantal ).
The hook method WDDOINIT is processed successfully, but as soon as I click on the button for the input help, the WebDynpro dumps with an UNCAUGHT_EXCEPTION Exception CX_WDR_RR_EXCEPTION. In the browser window the following message is processed:
"Component usage SH_VENDOR does not exist."
Where is my mistake? How can I use the value help in my select-option?
Thanks for any advice!
--MIKE
