Create and invoke a validator programmatically in when a user clicks a Button control

        
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
  <mx:Script>
    
    import mx.validators.ZipCodeValidator;
    private var v:ZipCodeValidator = new ZipCodeValidator();
    private function performValidation():void {
      v.domain = "US or Canada";
      v.listener=myZip;
      v.validate(myZip.text);
    }
  </mx:Script>
  <mx:TextInput id="myZip" />
  <mx:Button label="Submit" click="performValidation();" />
</mx:Application>

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Create and invoke a validator programmatically in when a user clicks a Button control : Validator « Development « Flex

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