Using the PhoneFormatter class

     
<?xml version="1.0"?>

<!--
formatString value        Input         Output
###-####                  1234567       456-7890
(###) ### ####            1234567890    (123) 456-7890
###-###-####              11234567890   123-456-7890
#(###) ### ####           11234567890   1(123) 456 7890
#-###-###-####            11234567890   1-123-456-7890
+###-###-###-####         1231234567890 +123-123-456-7890
-->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
  <mx:Script>
    
    [Bindable]
    private var newNumber:Number = 1234567;
    
  </mx:Script>
  <mx:PhoneFormatter id="PhoneDisplay" areaCode="415"
    formatString="###-####" />
  <mx:TextInput id="myTI"
    initialize="myTI.text=PhoneDisplay.format(newNumber);" />
</mx:Application>

1.	Using declared PhoneFormatter defined in mxml
2.	PhoneFormatter for formatting unformatted phone digits
3.	Using ActionScript to format based on data length
4.	Create an instance of a PhoneFormatter using ActionScript
5.	Set format string for PhoneFormatter
6.	Set validPatternChars for PhoneFormatter
7.	Add area code for PhoneFormatter
8.	Set area code format for PhoneFormatter
9.	PhoneFormatter and formatting parameters
10.	Use error property to check if a problem occurred during formatting

Using the PhoneFormatter class : PhoneFormatter « Data Model « Flex

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