<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.macromedia.com/2005/mxml" xmlns="*" 
  layout="vertical" creationComplete="loadDgView()">
 <mx:Script>
   <![CDATA[      
     [Bindable]
     public var works:Array= [
         { id: 1, name: ’feiy’, sex: ’male’},
         { id: 2, name: ’wenj’, sex: ’fmale’}];
     private var worksColumns:Array= [
       { columnName: "id",headerText: "work’s id",width: 100},
       { columnName: "name",headerText: "work’s name",width: 200},
       { columnName: "sex",headerText: "work’s sex",width: 100}];
     [Bindable]
     public var departments:Array=[
       { id: 1, name: ’tech dept.’},
       { id: 2, name: ’service dept.’}];
     private var departmentsColumns:Array= [
       { columnName: "id",headerText: "department’s id",width: 200},
       { columnName: "name",headerText: "department’s name",width:200}];
     private function loadDgView(){
       if(type_cb.selectedIndex==0){          
         view_dg.dataProvider=works;
       }else{
         view_dg.dataProvider=departments;
       }
     }
   ]]>
 </mx:Script>
 <mx:HBox>   
   <mx:ComboBox id="type_cb" change="loadDgView()">
     <mx:dataProvider>
       <mx:Array>
         <mx:Object label="works"/>
         <mx:Object label="departments"/>
       </mx:Array>
     </mx:dataProvider>
   </mx:ComboBox>    
 </mx:HBox>
 <mx:DataGrid id="view_dg" />
</mx:Application>

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx