SystemTrigger Classe

  • Référence

Définition

Espace de noms:
Windows.ApplicationModel.Background
Modifier

Représente un événement système qui déclenche l’exécution d’une tâche en arrière-plan.

public ref class SystemTrigger sealed
/// [Windows.Foundation.Metadata.Activatable(Windows.ApplicationModel.Background.ISystemTriggerFactory, 65536, Windows.Foundation.UniversalApiContract)]
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Standard)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.MTA)]
class SystemTrigger final
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Standard)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.MTA)]
/// [Windows.Foundation.Metadata.Activatable(Windows.ApplicationModel.Background.ISystemTriggerFactory, 65536, "Windows.Foundation.UniversalApiContract")]
class SystemTrigger final
[Windows.Foundation.Metadata.Activatable(typeof(Windows.ApplicationModel.Background.ISystemTriggerFactory), 65536, typeof(Windows.Foundation.UniversalApiContract))]
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Standard)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.MTA)]
public sealed class SystemTrigger
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Standard)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.MTA)]
[Windows.Foundation.Metadata.Activatable(typeof(Windows.ApplicationModel.Background.ISystemTriggerFactory), 65536, "Windows.Foundation.UniversalApiContract")]
public sealed class SystemTrigger
function SystemTrigger(triggerType, oneShot)
Public NotInheritable Class SystemTrigger
Héritage
Object Platform::Object IInspectable SystemTrigger
Attributs
ActivatableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute
Implémente
IBackgroundTrigger

Configuration requise pour Windows

Famille d’appareils
Windows 10 (introduit dans 10.0.10240.0)
API contract
Windows.Foundation.UniversalApiContract (introduit dans v1.0)

Exemples

L’exemple suivant montre comment créer et inscrire un déclencheur système avec l’événement TimeZoneChanged .

//
// A friendly task name.
//
String name = "ExampleTaskName";

//
// Must be the same entry point that is specified in the manifest.
//
String taskEntryPoint = "ExampleNamespace.ExampleTaskName";

//
// A system trigger that goes off whenever the time zone is changed, or a change occurs with daylight savings time.
//
IBackgroundTrigger trigger = new SystemTrigger(SystemTriggerType.TimeZoneChange, false);

//
// Builds the background task.
//
BackgroundTaskBuilder builder = new BackgroundTaskBuilder();

builder.Name = name;
builder.TaskEntryPoint = taskEntryPoint;
builder.SetTrigger(trigger);

//
// Registers the background task, and get back a BackgroundTaskRegistration object representing the registered task.
//
BackgroundTaskRegistration task = builder.Register();

Remarques

Notes

Cette classe n’est pas agile, ce qui signifie que vous devez prendre en compte son modèle de thread et son comportement de marshaling. Pour plus d’informations, consultez Threading and Marshaling (C++/CX) et Utilisation d’objets Windows Runtime dans un environnement multithread (.NET).

Constructeurs

SystemTrigger(SystemTriggerType, Boolean)

Initialise une nouvelle instance d’un déclencheur d’événement système.

Propriétés

OneShot

Obtient si un déclencheur d’événement système ne sera utilisé qu’une seule fois.
TriggerType

Obtient le type d’événement système d’un déclencheur d’événement système.

S’applique à

Voir aussi