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。
 1 <?xml version="1.0" encoding="utf-8"?>
 2 <!-- Simple example to demonstrate StringValidator. -->
 3 <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
 4 
 5     <mx:Script>
 6         import mx.controls.Alert;
 7     </mx:Script>
 8 
 9     <mx:StringValidator source="{fname}" property="text" 
10         tooShortError="This string is shorter than the minimum allowed length of 4. " 
11         tooLongError="This string is longer than the maximum allowed length of 20." 
12         minLength="4" maxLength="20"  
13         trigger="{myButton}" triggerEvent="click" 
14         valid="Alert.show('Validation Succeeded!');"/>
15 
16     <mx:Panel title="StringValidator Example" width="75%" height="75%" 
17         paddingTop="10" paddingLeft="10" paddingRight="10" paddingBottom="10">
18 
19             <mx:Form>               
20                 <mx:FormItem label="Enter a name between 4 and 20 characters: ">
21                     <mx:TextInput id="fname" width="100%"/>
22                 </mx:FormItem>
23 
24                 <mx:FormItem >
25                     <mx:Button id="myButton" label="Validate" />
26                 </mx:FormItem>
27             </mx:Form>    
28     </mx:Panel>
29 </mx:Application>