Use a DataTrigger to apply an action to either set a property value of a target node or activate an Activity node. A DataTrigger keeps that action applied for as long as the condition in that DataTrigger is met. When the condition in that DataTrigger is no longer met, Kanzi reverts the changes that it applied using that DataTrigger. Note that in a DataTrigger you can use only ApplyAction actions: ApplyActivationAction and ApplyPropertyAction.

You set the condition in a DataTrigger in the form of a binding expression that evaluates to either true or false. In the condition you can use as an input either a property or a data source.

For example, you can use a DataTrigger to control the logic and activation state of Activity nodes in Activity Host nodes using ApplyAction actions.

ApplyAction actions of a DataTrigger have higher priority than the actions of any other Trigger. For example, if you use a DataTrigger with an ApplyPropertyAction that sets the DataDrivenExclusiveActivityHostConcept::ActiveActivityIndexProperty to some value and any other Trigger with a SetPropertyAction that sets that same property to a different value, the effect of the SetPropertyAction becomes visible only after Kanzi unapplies the ApplyPropertyAction.

Monitors changes in properties and data source values. Use a Data Trigger to apply an action to either set a property value of a target node or activate an Activity node.

Inherits properties and message types from DataTriggerMetadata.

DataTrigger.DataTrigger:create(name) ¶

Constructor.

Parameters

name

(string)

The name of the trigger.