flex省市的comboBox下拉级联的数据即时绑定

 

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx=" http://www.adobe.com/2006/mxml" layout="absolute" fontSize="14"> <mx:Script>                 <![CDATA[                         imp ort mx.collections.ArrayCollection;                         imp ort mx.controls.Alert;                         //省份改变时候，对应的城市也变化                         public var cbo:Array;                         public var sheng:String;                         [Bindable]                         public var City:Array=['--请选择--'];                         public function fnchange(evt:Event):void{                                 sheng=cboSheng.selectedLabel.toString();                                 if(sheng=='湖北省'){                                          cbo=['武汉市','十堰','襄樊','宜昌','鄂州','孝感','恩施','黄石','丹江口','老河口'];                                 }                                 if(sheng=='湖南省'){                                          cbo=['长沙市','衡阳','岳阳','株洲','湘潭','岳塘','邵阳','临湘','常德','邵东'];                                 }                                 if(sheng=='河南省'){                                          cbo=['安阳','鹤壁','济源 ','焦作','洛阳','开封','南阳','商丘',' 信阳 ','周口'];                                 }                                 if(sheng=='河北省'){                                          cbo=['石家庄',' 唐山','廊坊','邢台',' 邯郸',' 衡水',' 张家口','秦皇岛',' 沧州','保定'];                                 }                                 if(sheng=='江西省'){                                          cbo=['南 昌','景德镇','萍 乡','新 余 ','九 江','瑞昌','鹰 潭','赣 州 ','瑞金','吉 安 '];                                 }                                 if(sheng=='辽宁省'){                                          cbo=['沈阳','大连','鞍山','海城','本溪','丹东','东港','锦州','凌海','营口'];                                 }                                 if(sheng=='吉林省'){                                          cbo=['吉林','长春','四平','通化','白山','松原','白城','江源',' 临江',' 集安'];                                 }                                 if(sheng=='浙江省'){                                          cbo=['衢州市','杭州市','湖州','嘉兴','宁波','绍兴','台州','温州','丽水','金花'];                                 }                                 if(sheng=='黑龙江省'){                                          cbo=['哈尔滨','阿城','尚志',' 双城','五常','齐齐哈尔','讷河','富裕','泰来','依兰'];                                 }                                 if(sheng=='广东省'){                                          cbo=['广州','深圳','东莞',' 珠海','中山','佛山','汕头','韶关','惠州'];                                 }                                 City=cbo;                         }                                              ]]>        </mx:Script>        <mx:ComboBox x="78" y="69" width="145" height="45" id="cboSheng" change="fnchange(event)" >            <mx:String>--请选择--</mx:String>            <mx:String>湖北省</mx:String>            <mx:String>湖南省</mx:String>            <mx:String>广东省</mx:String>            <mx:String>河南省</mx:String>            <mx:String>河北省</mx:String>            <mx:String>江西省</mx:String>            <mx:String>辽宁省</mx:String>            <mx:String>吉林省</mx:String>            <mx:String>浙江省</mx:String>            <mx:String>黑龙江省</mx:String>         </mx:ComboBox>        <mx:ComboBox x="264" y="69" width="149" height="45" id="cobCity" dataProvider="{City}">        </mx:ComboBox>         </mx:Application>