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Flex features predefined validation mechanism to validate data. The benefits of Flex validator is that it do not eradicate the requirement of data validation on the server. But it provides a mechanism as to how, one can improving performance by using the validation services.
The below sample code is a use of a flex ‘Email Validator’ component which is validating the ‘txtEmail’ textbox by clicking on the ‘btnEmailSubmit’ button.
<mx:EmailValidator source="{txtEmail}" property="text" trigger="{btnEmailSubmit}" triggerEvent="click" invalid="Alert.show('Invalid Email Address');" valid="someAction()"/>
<mx:TextInput id="txtEmail" width="166"/>
<mx:Button id="btnEmailSubmit" styleName="formButton" label="Submit"/>
The below sample code is a use of a flex ‘Email Validator’ component which is validating the ‘txtEmail’ textbox by clicking on the ‘btnEmailSubmit’ button.
<mx:EmailValidator source="{txtEmail}" property="text" trigger="{btnEmailSubmit}" triggerEvent="click" invalid="Alert.show('Invalid Email Address');" valid="someAction()"/>
<mx:TextInput id="txtEmail" width="166"/>
<mx:Button id="btnEmailSubmit" styleName="formButton" label="Submit"/>
