Flash CS3 Documentation

ActionScript 2.0 Components Language Reference > Data binding classes > CustomValidator class

CustomValidator class

ActionScript Class Name mx.data.binding.CustomValidator

You use the CustomValidator class when you want to perform custom validation of a data field contained by a component. To make this class available at runtime, you must include the data binding classes in your FLA file. For more information, see Making data binding classes available at runtime.

To create a custom validator class, you first create a subclass of mx.data.binding.CustomValidator that implements a method named validate(). This method is automatically passed a value to be validated. For more information about how to implement this method, see CustomValidator.validate().

Next, you assign your custom validator class to a field of a component by using the Component inspector's Schema tab. For an example of creating and using a custom validator class, see the Example section in the CustomValidator.validate() entry.

To assign a custom validator:

1. Confirm that your Publish Settings specify ActionScript 2.0.
2. In the Component inspector, select the Schema tab.
3. Select the field you want to validate, and then select Custom from the Data Type pop-up menu.
4. Double-click the Validation Options field to open the Custom Validation Settings dialog box.
5. In the ActionScript Class text box, enter the name of the custom validator class you created.

   In order for the class you specify to be included in the published SWF file, it must be in the classpath.

For an overview of the classes in the mx.data.binding package, see Classes in the mx.data.binding package.

Method summary for the CustomValidator class

The following table lists the methods of the CustomValidator class.

Flash CS3