TriggerBase Class

Definition

Serves as the base class for EventTrigger. Not commonly used. See Remarks.

Equivalent WinUI class: Microsoft.UI.Xaml.TriggerBase.

public ref class TriggerBase : DependencyObject
/// [Windows.Foundation.Metadata.Composable(Windows.UI.Xaml.ITriggerBaseFactory, Windows.Foundation.Metadata.CompositionType.Protected, 65536, Windows.Foundation.UniversalApiContract)]
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.WebHostHidden]
class TriggerBase : DependencyObject
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.WebHostHidden]
/// [Windows.Foundation.Metadata.Composable(Windows.UI.Xaml.ITriggerBaseFactory, Windows.Foundation.Metadata.CompositionType.Protected, 65536, "Windows.Foundation.UniversalApiContract")]
class TriggerBase : DependencyObject
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.WebHostHidden]
/// [Windows.Foundation.Metadata.Composable(Windows.UI.Xaml.ITriggerBaseFactory, Windows.Foundation.Metadata.CompositionType.Public, 65536, "Windows.Foundation.UniversalApiContract")]
class TriggerBase : DependencyObject
[Windows.Foundation.Metadata.Composable(typeof(Windows.UI.Xaml.ITriggerBaseFactory), Windows.Foundation.Metadata.CompositionType.Protected, 65536, typeof(Windows.Foundation.UniversalApiContract))]
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.WebHostHidden]
public class TriggerBase : DependencyObject
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.WebHostHidden]
[Windows.Foundation.Metadata.Composable(typeof(Windows.UI.Xaml.ITriggerBaseFactory), Windows.Foundation.Metadata.CompositionType.Protected, 65536, "Windows.Foundation.UniversalApiContract")]
public class TriggerBase : DependencyObject
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.WebHostHidden]
[Windows.Foundation.Metadata.Composable(typeof(Windows.UI.Xaml.ITriggerBaseFactory), Windows.Foundation.Metadata.CompositionType.Public, 65536, "Windows.Foundation.UniversalApiContract")]
public class TriggerBase : DependencyObject
Public Class TriggerBase
Inherits DependencyObject
Inheritance
TriggerBase
Derived
Attributes

Windows 10 requirements

Device family
Windows 10 (introduced in 10.0.10240.0)
API contract
Windows.Foundation.UniversalApiContract (introduced in v1.0)

Remarks

Triggers, EventTrigger, Actions and BeginStoryboard are not commonly used. These API mainly exist for compatibility in XAML originally used for Microsoft Silverlight. For most scenarios where event triggers were used previously, you should either use visual states, or start animations by writing a Loaded handler that looks up an animation in page-level resources and then calls Begin on the animation's main Storyboard. For more info, see Quickstart: Control templates or Storyboarded animations.

Properties

Dispatcher

Gets the CoreDispatcher that this object is associated with. The CoreDispatcher represents a facility that can access the DependencyObject on the UI thread even if the code is initiated by a non-UI thread.

Equivalent WinUI property: Microsoft.UI.Xaml.DependencyObject.Dispatcher.

(Inherited from DependencyObject)

Methods

ClearValue(DependencyProperty)

Clears the local value of a dependency property.

Equivalent WinUI method: Microsoft.UI.Xaml.DependencyObject.ClearValue.

(Inherited from DependencyObject)
GetAnimationBaseValue(DependencyProperty)

Returns any base value established for a dependency property, which would apply in cases where an animation is not active.

Equivalent WinUI method: Microsoft.UI.Xaml.DependencyObject.GetAnimationBaseValue.

(Inherited from DependencyObject)
GetValue(DependencyProperty)

Returns the current effective value of a dependency property from a DependencyObject.

Equivalent WinUI method: Microsoft.UI.Xaml.DependencyObject.GetValue.

(Inherited from DependencyObject)
ReadLocalValue(DependencyProperty)

Returns the local value of a dependency property, if a local value is set.

Equivalent WinUI method: Microsoft.UI.Xaml.DependencyObject.ReadLocalValue.

(Inherited from DependencyObject)
RegisterPropertyChangedCallback(DependencyProperty, DependencyPropertyChangedCallback)

Registers a notification function for listening to changes to a specific DependencyProperty on this DependencyObject instance.

Equivalent WinUI method: Microsoft.UI.Xaml.DependencyObject.RegisterPropertyChangedCallback.

(Inherited from DependencyObject)
SetValue(DependencyProperty, Object)

Sets the local value of a dependency property on a DependencyObject.

Equivalent WinUI method: Microsoft.UI.Xaml.DependencyObject.SetValue.

(Inherited from DependencyObject)
UnregisterPropertyChangedCallback(DependencyProperty, Int64)

Cancels a change notification that was previously registered by calling RegisterPropertyChangedCallback.

Equivalent WinUI method: Microsoft.UI.Xaml.DependencyObject.UnregisterPropertyChangedCallback.

(Inherited from DependencyObject)

Applies to

See also