Show different output in ALV controlled by dropdown

Hi,

i am new in WebDynpro ABAP.

I want to change the Output from an ALV which is specified on an selection by the Dropdown.

For Example:

DropdownList containing values like value1, value2...

For value1 the Output for the ALV will be temp1.

For value2 the Output for the ALV will be temp2

Method temp1.

DATA: lo_nd_temp1 TYPE REF TO if_wd_context_node,
             lo_el_temp1 TYPE REF TO if_wd_context_element,
             ls_temp1   TYPE wd_this->element_template,
             lt_temp1         TYPE wd_this->elements_template,

...Code for filling lt_example

lo_el_temp1 = lo_nd_temp1->create_element( ).
lo_nd_temp1->bind_table( new_items = lt_temp1_).

Method temp2.

*The same like temp1 with different contant in it_temp1.

Method onaction.

  lo_el_dropdownbykey->get_attribute(
    EXPORTING
      name  = 'KEY'
    IMPORTING
      value = lv_value ).

CASE lv_value.
  WHEN 'value1'.
      *Show Content it_temp1.
  WHEN 'value2'.
      *Show Content it_temp2.
  WHEN OTHERS.

Do I Need two different ALV like ALV_temp1 and ALV_temp2 or can i modify the displayed Content for one ALV?