flex stringValidator字符串验证

StringValidator 类用于验证字符串的长度是否位于指定范围内。

<?xml version="1.0" encoding="utf-8"?>
<!-- Simple example to demonstrate StringValidator. -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">

    <mx:Script>
        import mx.controls.Alert;
    </mx:Script>

    <mx:StringValidator source="{fname}" property="text" 
        tooShortError="This string is shorter than the minimum allowed length of 4. " 
        tooLongError="This string is longer than the maximum allowed length of 20." 
        minLength="4" maxLength="20"  
        trigger="{myButton}" triggerEvent="click" 
        valid="Alert.show('Validation Succeeded!');"/>

    <mx:Panel title="StringValidator Example" width="75%" height="75%" 
        paddingTop="10" paddingLeft="10" paddingRight="10" paddingBottom="10">

            <mx:Form>               
                <mx:FormItem label="Enter a name between 4 and 20 characters: ">
                    <mx:TextInput id="fname" width="100%"/>
                </mx:FormItem>

                <mx:FormItem >
                    <mx:Button id="myButton" label="Validate" />
                </mx:FormItem>
            </mx:Form>    
    </mx:Panel>
</mx:Application>