SystemCondition Klasse

  • Referenz

Definition

Namespace:
Windows.ApplicationModel.Background
Bearbeiten

Stellt eine Systembedingung dar, die wirksam sein muss, damit eine Hintergrundaufgabe ausgeführt werden kann.

public ref class SystemCondition sealed
/// [Windows.Foundation.Metadata.Activatable(Windows.ApplicationModel.Background.ISystemConditionFactory, 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 SystemCondition 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.ISystemConditionFactory, 65536, "Windows.Foundation.UniversalApiContract")]
class SystemCondition final
[Windows.Foundation.Metadata.Activatable(typeof(Windows.ApplicationModel.Background.ISystemConditionFactory), 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 SystemCondition
[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.ISystemConditionFactory), 65536, "Windows.Foundation.UniversalApiContract")]
public sealed class SystemCondition
function SystemCondition(conditionType)
Public NotInheritable Class SystemCondition
Vererbung
Object Platform::Object IInspectable SystemCondition
Attribute
ActivatableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute
Implementiert
IBackgroundCondition

Windows-Anforderungen

Gerätefamilie
Windows 10 (eingeführt in 10.0.10240.0)
API contract
Windows.Foundation.UniversalApiContract (eingeführt in v1.0)

Beispiele

Im folgenden Beispiel wird das in SystemTrigger gezeigte Beispiel erweitert, indem der Hintergrundaufgabe auch eine Bedingung hinzugefügt wird.

//
// 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);

//
// A system condition indicating that the background task shouldn't run until the user is present.
//
SystemCondition condition = new SystemCondition(SystemConditionType.UserPresent)

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

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

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

Hinweise

Hinweis

Diese Klasse ist nicht agil, was bedeutet, dass Sie das Threadingmodell und das Marshallverhalten berücksichtigen müssen. Weitere Informationen finden Sie unter Threading and Marshaling (C++/CX) und Using Windows-Runtime objects in a multithreaded environment (.NET).

Konstruktoren

SystemCondition(SystemConditionType)

Initialisiert eine neue instance einer Systembedingung.

Eigenschaften

ConditionType

Ruft den Bedingungstyp einer Systembedingung ab.

Gilt für: