void ValueHiddenField_ValueChanged

<script runat="server">
void ValueHiddenField_ValueChanged (Object sender, EventArgs e)
  {

    // Display the value of the HiddenField

//unbound (items are Apples,Oranges,Grapes,Fruits)
string s="",str="";
foreach (ListItem li in DropDownList1.Items) 
        {
           bool b = li.Text.Equals("Apples");

<%@ Application Language="C#" %>

 declare
   eno number(4);
   begin
       for i in 1..5
        loop
            eno:=&eno;
           dbms_output.put_line(eno);
       end loop;
   end;

declare
i number:=0;
begin
while i<3
loop
update dept set empno=&empno where dname='&deptname';
i:=i+1;
end loop;
end;

 CREATE TRIGGER WORKER_LODG_MANAG_update
instead OF UPDATE ON  WORKER_LODG_MANAG 
FOR each ROW
BEGIN
   IF :old.name<>:NEW.name
     THEN 
        UPDATE WORKER 
                     SET name=:NEW.name
                     WHERE name=:old.name;
    END IF;
   IF :old.lodging<>:NEW.lodging

if :old.name<>:new.name
  then update WORKER
      set name=:new.name
      where name=:old.name 
 end if;

if :old.name<>:new.name
  then update WORKER
      set name=:new.name
      where name=:old.name 
 end if;