User Guide

Working with Flex data services 141

Select the source of the data passed to the data service.

The source can be the property of a component or data model.

For example, if you have a TextInput component that lets users enter a zip code, select the

TextInput component in the left pane and then select the text:String property in the right

pane.

If you want, you can modify the binding expression in the Binding Source text box.

Click Finish to create the binding.

The new binding appears in the Bindings panel.

Create an event handler to call the data service.

You can create this event handler rapidly with Flex Builder. For instructions, see “Calling the

data service” on page 141.

Calling the data service

If you create a binding that passes data to, or retrieves data from, a data service, then you must

create an event handler that calls the data service. A component can call a data service such as a

web service only in response to an event. Otherwise, the data service is never invoked. You can

create this event handler rapidly with Flex Builder.