List Item in Oracle forms

Hello, I am using oracle weblogic 10.3.5 with oracle forms 11g at windows 7 platform.I have an oracle form with a list item(database item). Now I have attached a record group from another database table to populate list item.My list item is by default set at null value but I want to show a particular value in list item as when new instance of list item is occurred:
|                 ABC                                    |
|__________________________________|
it is a list item.It has 4 values as
Name          Value
' '                    NULL
A                    1
B                    2
ABC                3
D                    4
and when list item instance is loaded then I want to show the ABC (able name) and 3 (value) in list item.
thank You
regards aaditya

Block Level Trigger: When new record instance
:list_item:=3;

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Problem with List Item in oracle forms

Hello Experts,
                     I am new in oracle forms and i am using oracle forms 11g with weblogic 10.3.5 at windows 7.
I have 3 database tables say(tbl_city,tbl_state,tbl_address).
tbl_city
C_ID
C_name
S_ID
0
None
0
1
XYZ
1
2
AS
2
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ASD
tbl_address
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A_Street
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1
ABC
1
1
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Here I want when I set State_name to ASD then List item list_city should be populated with the values having State_NAME=ASD not of State_Name=XY or None.I have tried it to make but not succeeded.I have made a procedure to populate list_city list item as:
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group_id RecordGroup;
group_name varchar2(10) :='abc';
status NUMBER;
query1 varchar2(350);
item_name varchar2(20);
match varchar2(50);
BEGIN
    match:=mtch;
    item_name:=block_nm||'.'||item_nm;
group_id := find_group(group_name);
if not id_null(group_id) then
delete_group(group_id);
end if;
--if whr='' then
--    match:='0';
--    end if;
query1:='select '|| sel_val || ',TO_CHAR('|| sel_val2 || ') from '|| tablNm ||' where '||whr||' = '||mtch;
message(query1);
group_id := Create_Group_From_Query(group_name,query1);
/* Select statement must have two column*/
status := Populate_Group(group_id);
Populate_List(item_name,group_id);
exception
    when others then
    message('error');
END;
I am not able to guess what trigger in oracle forms should be used to populate list item(list_city). Please help by giving useful suggestion.
Thank You
regards
aaditya

979801 wrote:
If I use LOV in place of List Item,Then I have to populate a LOV at run time.How could I maintain a record group n attach to LOV at run time?
On my previous post I have mentioned record group as follows:
select * from tbl_state where s_id=:tbl_address.s_id;
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Hello Bobb,
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modi wrote:
thanks for your response,
i read this example but i have some question for this :
1- i create this trigger on display item or list item ?List item
2-when i write rg_name VARCHAR2(40) := 'country'; this meaning my list or display item 'COUNTRY' name?yes it's country name...
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this meaning i will display two column in list country_name NAME and COUNTRY_ID VALUE ?yesss
4-when i write POPULATE_LIST('BLOCK3.COUNTRIES', rg_name); this datablock name and item name?yes list item name will be populated from the dynamic record group created from the query
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List Item in Oracle forms

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