Flex学习笔记，脚本式验证

<?xml version="1.0" encoding="utf-8"?>
<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/mx" minWidth="955" minHeight="600">
   <fx:Script>
       <![CDATA[
           import mx.controls.Alert;
           import mx.events.ValidationResultEvent;
           import mx.validators.EmailValidator;
           import mx.validators.StringValidator;
           import mx.validators.ValidationResult;
           public var emailVal:EmailValidator = new EmailValidator();
           public var stringVal:StringValidator = new StringValidator();
           public function validateForm():void
           {
            var valResult:ValidationResultEvent;
            stringVal.source=username;
            stringVal.property = "text";
            stringVal.minLength=6;
            emailVal.source = email;
            emailVal.property = "text";
            valResult = emailVal.validate();
            if(valResult.type == "invalid" )
            {
              Alert.show("Please fix your Email address.");
            }
            else 
            {
                valResult = stringVal.validate();
                if(valResult.type == "invalid")
                {
                  Alert.show("Please fix your Username.");
                }
            }
           }
       ]]>
   </fx:Script>
    <s:VGroup horizontalCenter="0" verticalCenter="0">
        <s:Label text="Email:"/>
        <s:TextInput id="email"/>
        <s:Label text="Enter your username:"/>
        <s:TextInput id="username"/>
        <s:Button label="提交" id="submitButton" click="validateForm()"/>
    </s:VGroup>
    
</s:Application>