#130 – WPF Supports Three Types of Triggers

WPF supports three different types of triggers:

• Property triggers
  • Fire when the value of a dependency property changes
  • Specifies trigger property using property name
  • Actions
    • Setter elements set values for one or more dependency properties
    • One or more TriggerAction classes fire, when trigger becomes active or becomes inactive
• Data triggers
  • Fire when the value of a CLR property changes
  • Specifies property using Binding keyword
  • Actions
    • Setter elements sets values for one or more dependency properties
    • One or more TriggerAction classes fire, when trigger becomes active or becomes inactive
• Event triggers
  • Fire when a routed event is raised
  • Action: Class that derives from TriggerAction fires, e.g. BeginStoryboard or SoundPlayerAction
  • Often used for animations