Change values of drop down list when other drop-down list value is clicked

Question

Hi Gurus,
I look for my requirement very much but I can't find. I think it must be very simple but I can't do it, please help :
I have to custom added fields. Both of them is made drop-down list by picklist defined in GET_P...methods.
When I click and select a value from the first drop-down list, I want that second drop-down values are fully changed, depend on what I select in the first list. If I select my value and press enter in the first drop down box, I can do my requirement with GET_V...method. But if I don't press enter, the values of second list doesn't change, they remain same. I want exactly that when I click and select a value from first drop-down list, second drop-down list values are automatically change, dependent on what selected. Do I have to define and event?? where and how, please help me..

Answer 1

Hi,
You must have created the field as a dropdown using the below code in the get_p method.
CASE iv_property.
    WHEN if_bsp_wd_model_setter_getter~fp_fieldtype.
        rv_value = cl_bsp_dlc_view_descriptor=>field_type_picklist.
  ENDCASE.
Here you need to add the below lines of code along with the previous code. for the first dropdown value
  IF iv_property =  if_bsp_wd_model_setter_getter=>fp_server_event.
    rv_value = 'DDLB_CLICK'.
  ENDIF.
This would refresh the screen when the user selects any value from the dropdown.
Regards,
Radhika