Represents a trigger that applies a set of actions in response to an event.
Assembly: PresentationFramework (in PresentationFramework.dll)
Gets the collection of actions to apply when the event occurs.
Gets a value that indicates whether this instance is currently sealed (read-only).(Inherited from DependencyObject.)
Gets or sets the RoutedEvent that will activate this trigger.
Gets or sets the name of the object with the event that activates this trigger. This is only used by element triggers or template triggers.
This API supports the product infrastructure and is not intended to be used directly from your code. Adds a child object.
This API supports the product infrastructure and is not intended to be used directly from your code. Adds the text content of a node to the object.
Trigger objects have the Setters, EnterActions, and ExitActions properties that apply changes or actions based on the state of certain properties, while objects start a set of Actions when a specified routed event occurs. For example, you may want to use an to start a set of animations when the mouse pointer is over a certain user interface (UI) control. Unlike Trigger, has no concept of termination of state, so the action will not be undone once the condition that raised the event is no longer true.
Note that when using an Button or TextBox perform specific actions on user input events such as mouse clicks and keyboard events. For example, if you are styling a button and try to set the MouseDown event as the RoutedEvent of an , the never gets applied because the event first gets handled by the button. Instead, you can use the PreviewMouseDown event or a different event., you need to choose events that do not interfere with the inherent behavior of your control. Controls such as
This example shows how to use event triggers in a style to animate the MouseEnter and MouseLeave events of a FrameworkElement. In this example, the Style has the TargetType set to Rectangle. Therefore, there is no need to qualify the MouseEnter and MouseLeave event names with the class name.
Available since 3.0
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.