SystemCondition Kelas

Definisi

Ruang nama:

Windows.ApplicationModel.Background

Mewakili kondisi sistem yang harus berlaku agar tugas latar belakang berjalan.

public ref class SystemCondition sealed

/// [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.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

Warisan

Object Platform::Object IInspectable SystemCondition

Atribut

ActivatableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Penerapan

IBackgroundCondition

Persyaratan Windows

Rangkaian perangkat	Windows 10 (diperkenalkan dalam 10.0.10240.0)
API contract	Windows.Foundation.UniversalApiContract (diperkenalkan dalam v1.0)

Contoh

Contoh berikut meluas pada contoh yang diperlihatkan di SystemTrigger dengan juga menambahkan kondisi ke tugas latar belakang.

//
// 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();

Keterangan

Catatan

Kelas ini tidak tangkas, yang berarti Anda perlu mempertimbangkan model utas dan perilaku marshalingnya. Untuk informasi selengkapnya, lihat Threading dan Marshaling (C++/CX) dan Menggunakan objek Windows Runtime di lingkungan multithreaded (.NET).

Konstruktor

SystemCondition(SystemConditionType)

Menginisialisasi instans baru kondisi sistem.

Properti

ConditionType

Mendapatkan jenis kondisi kondisi sistem.