Using Select options how to validate

Question

Hi Experts,
I am using webdynpro abap component select options.In select options i am using vbeln field i want to validate the entered value.How to validate it.Can give me for this solution is there any example provide me.

Answer 1

Hi Chandra sekhar ,
Can you give me the clear idea for validation.I have done initially in wddoinit
method WDDOINIT .
* Reference variable used instantiate the select-options component
DATA
lr_cmp_usage TYPE REF TO if_wd_component_usage.
* Variables used to create the select-options fields and
* define its initial values
DATA:
lr_field TYPE REF TO data.
FIELD-SYMBOLS:
<fs_field> TYPE ANY,
<fs_range> TYPE INDEX TABLE.
* Instantiate the select-options component
lr_cmp_usage = wd_this->wd_cpuse_cmp_sel_opt( ).
IF lr_cmp_usage->has_active_component( ) IS INITIAL.
lr_cmp_usage->create_component( ).
ENDIF.
* Sets the helper reference
wd_this->m_sel_opt = wd_this->wd_cpifc_cmp_sel_opt( ).
wd_this->m_helper = wd_this->m_sel_opt->init_selection_screen( ).
* Hide the standard select-options components.
wd_this->m_helper->set_global_options(
i_display_btn_cancel = abap_false
i_display_btn_check = abap_false
i_display_btn_reset = abap_false ).
* Adding a block (type Tray) to the select-options
wd_this->m_helper->add_block(
i_id = `BL01`
i_block_type = if_wd_select_options=>mc_block_type_tray
i_title = `Flight Booking` ).
* Adding a parameter field to the created block
* Create a reference to the type of airline code
CREATE DATA lr_field TYPE s_carr_id.
* Sets the airline code initial value
ASSIGN lr_field->* TO <fs_field>.
<fs_field> = 'AA '.
* Add the parameter to the group
wd_this->m_helper->add_parameter_field(
i_id = `CARRID`
i_within_block = `BL01`
i_value = lr_field ).
FREE lr_field.
UNASSIGN <fs_field>.
* Adding a select-options field to the created block
* Create a reference to the connection number range table
lr_field = wd_this->m_helper->create_range_table( `S_CONN_ID` ).
* Add the select-option to the group
wd_this->m_helper->add_selection_field(
i_id = `CONNID`
i_within_block = `BL01`
it_result = lr_field ).
FREE lr_field.
endmethod.
and in button i have done as
method ONACTIONON_EXECUTE .
  TYPES:
lty_r_connid TYPE RANGE OF s_conn_id.
DATA
lr_sbook TYPE REF TO if_wd_context_node.
* Variables used to retrieve the values of select-options fields
DATA
lt_sel_item TYPE if_wd_select_options=>tt_selection_screen_item.
FIELD-SYMBOLS:
<fs_sel_item> LIKE LINE OF lt_sel_item,
<fs_carrid> TYPE s_carr_id,
<fs_connid> TYPE lty_r_connid.
* Get the selection-screen items
wd_this->m_helper->get_selection_screen_items(
IMPORTING et_selection_screen_items = lt_sel_item ).
* Retrieve the values from the select-options items
LOOP AT lt_sel_item ASSIGNING <fs_sel_item>.
CASE <fs_sel_item>-m_id.
WHEN `CARRID`.
ASSIGN <fs_sel_item>-m_value->* TO <fs_carrid>.
WHEN `CONNID`.
ASSIGN <fs_sel_item>-mt_range_table->* TO <fs_connid>.
ENDCASE.
ENDLOOP.
* Retrieve the data from the database, for simplicity, the
* SELECT statement has been implemented here.
SELECT * FROM sbook
INTO TABLE wd_this->t_sbook
WHERE carrid = <fs_carrid>
AND connid IN <fs_connid>.
* Bind the data to the context
lr_sbook = wd_context->get_child_node( name = `T_SBOOK`).
lr_sbook->bind_table( wd_this->t_sbook ).
endmethod.
now can you provide me the code for carrid and connid validation how has to be done.Please give me this solution