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Flex no.2

--------------ex2_01_solution  ѡȡʱ¼ä-----------------------
 ...
   private function dateChangeHandler():void
   {
    // The Alert.show() message displays a static string plus the selected date in the startDate control
    Alert.show('You have selected ' + startDate.selectedDate.toDateString());
   }
... 
 <mx:DateChooser id="startDate"
     x="34" y="94" 
     showToday="true" 
     change="dateChangeHandler()"/>
--------------ex2_2_solution  ѡȡʱ¼ä-----------------------CalendarLayoutChangeEvent
protected function dateChangeHandler(event:CalendarLayoutChangeEvent):void
{
    if ((event.target.id == "endDate") && (startDate.selectedDate >  endDate.selectedDate))
    {
     Alert.show("Start date must be scheduled before end date.");
    }
}
....
 <mx:DateChooser id="startDate"
     x="34" y="94" 
     showToday="true" 
     change="dateChangeHandler(event)"/>
--------------ex2_3_solution  ѡȡʱ¼ä-----------------------addEventListener
<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/halo"
      minWidth="1024" minHeight="768"
      creationComplete="initApp()">
...
   private function initApp():void
   {
    // Add the event listener using ActionScript instead of inline in the DateChooser instances
    startDate.addEventListener(CalendarLayoutChange


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import mx.controls.Alert;
import flash.display.*;
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