Adobe Flex 4: Training from the Source, Volume 1

Lesson 15. Using Formatters and Validators

What You Will Learn

In this lesson, you will:

• Use a formatter and remove string concatenation

• Look at a two-way data binding example

• Use a validator to check if data is in a valid format

• Learn to trigger validation in ActionScript

Approximate Time

This lesson takes approximately 1 hour to complete.

Flex provides many types of built-in formatters and validators that enable you to display and validate user-supplied data such as dates, numbers, and currencies. Using the built-in data validators on the client side, you can make your application perform better by reducing calls to the server for validation. You can also save development time by using the built-in formatters to automate the ...