Help with Flex and DropDownList

Question

Hello everybody, i need another help
i'm triyng to do the next in flex: using DropDownListi and Mysql DB, I want select to a product from a DropDownList after i select a corresponding brand for example:
* Coca Cola
  -- Coca Cola Light
  -- Coca Cola Zero
  -- Coca Cola Regular
* Pepsi
  -- Pepsi Light
  -- Pepsi regular
those are products that i have on my DB, i get see on my first DropDownList all brand's but i can select any product, because i don't know how made that relation between DropDownList's, here is my code, can any body help me? PLEASE ????
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
                  xmlns:s="library://ns.adobe.com/flex/spark"
                  xmlns:mx="library://ns.adobe.com/flex/mx"
                  minWidth="500" minHeight="600" backgroundColor="#F4BE55"
                  xmlns:employeeservice="services.employeeservice.*">
     <fx:Style source="Prueba8.css"/>
     <fx:Script>
          <![CDATA[
               import com.adobe.serializers.utility.TypeUtility;
               import mx.controls.Alert;
               import mx.controls.Text;
               import mx.events.FlexEvent;
               import mx.rpc.events.ResultEvent;
               import spark.events.IndexChangeEvent;
               protected function marDr_creationCompleteHandler(event:FlexEvent):void
                    getMarcaResult.token = employeeService.getMarca();
               protected function proDp_creationCompleteHandler(event:FlexEvent):void
                    getProductoByMarcaResult.token = employeeService.getProductoByMarca('Pep');
          ]]>
     </fx:Script>
     <fx:Declarations>
          <s:CallResponder id="getMarcaResult"/>
          <employeeservice:EmployeeService id="employeeService"
          fault="Alert.show(event.fault.faultString + '\n' + event.fault.faultDetail)"
                 showBusyCursor="true"/>
          <s:CallResponder id="getProductoByMarcaResult"/>
     </fx:Declarations>
     <s:Label x="137" y="10" text="Prueba 1  -  Ejemplos" fontWeight="bold" fontSize="20"/>
     <s:DropDownList x="99" y="97" prompt="Selecciona Marca ..."
                         width="169" id="marDr"
                         creationComplete="marDr_creationCompleteHandler(event)"
                         labelField="marca"
                         cornerRadius="7"
                         borderColor="#BC660A"
                         chromeColor="#C76F20"
                         focusColor="#AA7A06"
                         selectionColor="#DFA055"
                         rollOverColor="#FFAB3E">
          <s:AsyncListView list="{getMarcaResult.lastResult}"/>
     </s:DropDownList>
     <s:DropDownList x="65" y="247" prompt="Seleccione el producto ..."
                         id="proDp" width="205"
                         creationComplete="proDp_creationCompleteHandler(event)"
                         labelField="ds_producto">
          <s:AsyncListView list="{TypeUtility.convertToCollection(getProductoByMarcaResult.lastResult)}"/>
     </s:DropDownList>
</s:Application>
and this is my service
<?php
class EmployeeService {
  var $username = "test";
  var $password = "12345";
  var $server = "192.168.0.194";
  var $port = "3306";
  var $databasename = "proyect";
  var $connection;
  public function __construct() {
    $this->connection = mysqli_connect(
                       $this->server, 
                       $this->username, 
                       $this->password,
                       $this->databasename,
                       $this->port
    $this->throwExceptionOnError($this->connection);
  public function getMarca() {
     $stmt = mysqli_prepare($this->connection,
          "select co_marca,
                  no_marca
           from cmm_d_marca");    
      $this->throwExceptionOnError();
      mysqli_stmt_execute($stmt);
      $this->throwExceptionOnError();
      $rows = array();
      mysqli_stmt_bind_result($stmt, $row->cod, $row->marca);
      while (mysqli_stmt_fetch($stmt)) {
          $rows[] = $row;
          $row = new stdClass();
          mysqli_stmt_bind_result($stmt,  $row->cod, $row->marca);
      mysqli_stmt_free_result($stmt);
      mysqli_close($this->connection);
      return $rows;
  public function getProductoByMarca($searchStr) {
     $stmt = mysqli_prepare($this->connection,
          "select id_producto,
                  co_marca,
                  ds_producto
          from cmm_f_producto
          where co_marca like ?");
      $this->throwExceptionOnError();
      mysqli_stmt_bind_param($stmt, 's', $searchStr);
      $this->throwExceptionOnError();
      mysqli_stmt_execute($stmt);
      $this->throwExceptionOnError();
      $rows = array();
      mysqli_stmt_bind_result($stmt, $row->id_producto, $row->co_marca,
                              $row->ds_producto);
      while (mysqli_stmt_fetch($stmt)) {
          $rows[] = $row;
          $row = new stdClass();
          mysqli_stmt_bind_result($stmt, $row->id_producto, $row->co_marca,
                              $row->ds_producto);
      mysqli_stmt_free_result($stmt);
      mysqli_close($this->connection);
      return $rows;
?>
Please somebody help me i need a solution a soon as possible please . thank's.
Juedvaga

Answer 1

Hello evrybody, look I upload my project and i need help.
all that i want is made dependents-->   combobox or dorpdownlist.
there are 2 links into megaupload:
Project : http://www.megaupload.com/?d=X6V25N8O
DataBase : http://www.megaupload.com/?d=T6TLI3OL
Please i need help this i have to finish this point to start with another point.