Use validate() method to validate a Model object

          
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
  <mx:Model id="date">
    <dateInfo>
      <month>{monthInput.text}</month>
      <day>{dayInput.text}</day>
      <year>{yearInput.text}</year>
    </dateInfo>
  </mx:Model>
  <mx:DateValidator id="dayV" 
                    triggerEvent="" 
                    daySource="{dayInput}"
                  dayProperty="text" 
                  monthSource="{monthInput}" 
                  monthProperty="text"
                  yearSource="{yearInput}" 
                  yearProperty="text" />
  <mx:Form>
    <mx:TextInput id="monthInput" />
    <mx:TextInput id="dayInput" />
    <mx:TextInput id="yearInput" />
  </mx:Form>
  <mx:Button label="Submit" click="dayV.validate();" />
</mx:Application>

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Use validate() method to validate a Model object : Model « Data Model « Flex

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