ProximityDevice.GetDefault Methode
Definition
Wichtig
Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.
Erstellt eine instance einer ProximityDevice-Klasse und aktiviert den Standardnäheranbieter.
public:
static ProximityDevice ^ GetDefault();
static ProximityDevice GetDefault();
public static ProximityDevice GetDefault();
function getDefault()
Public Shared Function GetDefault () As ProximityDevice
Gibt zurück
Ein neues Näherungsgerät, das den Standard näherungsanbieter verwendet. Gibt NULL zurück, wenn keine Näherungsgeräte installiert sind.
Windows-Anforderungen
App-Funktionen |
ID_CAP_PROXIMITY [Windows Phone]
proximity
ID_CAP_PROXIMITY [Windows Phone]
|
Beispiele
Windows.Networking.Proximity.ProximityDevice proximityDevice;
private void InitializeProximityDevice()
{
proximityDevice = Windows.Networking.Proximity.ProximityDevice.GetDefault();
if (proximityDevice != null) {
proximityDevice.DeviceArrived += ProximityDeviceArrived;
proximityDevice.DeviceDeparted += ProximityDeviceDeparted;
WriteMessageText("Proximity device initialized.\n");
}
else
{
WriteMessageText("Failed to initialized proximity device.\n");
}
}
private void ProximityDeviceArrived(Windows.Networking.Proximity.ProximityDevice device)
{
WriteMessageText("Proximate device arrived. id = " + device.DeviceId + "\n");
}
private void ProximityDeviceDeparted(Windows.Networking.Proximity.ProximityDevice device)
{
WriteMessageText("Proximate device departed. id = " + device.DeviceId + "\n");
}
// Write a message to MessageBlock on the UI thread.
private Windows.UI.Core.CoreDispatcher messageDispatcher = Window.Current.CoreWindow.Dispatcher;
async private void WriteMessageText(string message, bool overwrite = false)
{
await messageDispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
() =>
{
if (overwrite)
MessageBlock.Text = message;
else
MessageBlock.Text += message;
});
}
Dim proximityDevice As Windows.Networking.Proximity.ProximityDevice
Private Sub InitializeProximityDevice()
proximityDevice = Windows.Networking.Proximity.ProximityDevice.GetDefault()
If proximityDevice IsNot Nothing Then
AddHandler proximityDevice.DeviceArrived, AddressOf ProximityDeviceArrived
AddHandler proximityDevice.DeviceDeparted, AddressOf ProximityDeviceDeparted
WriteMessageText("Proximity device initialized." & vbTab)
Else
WriteMessageText("Failed to initialized proximity device." & vbTab)
End If
End Sub
Private Sub ProximityDeviceArrived(device As Windows.Networking.Proximity.ProximityDevice)
WriteMessageText("Proximate device arrived. id = " & device.DeviceId & vbTab)
End Sub
Private Sub ProximityDeviceDeparted(device As Windows.Networking.Proximity.ProximityDevice)
WriteMessageText("Proximate device departed. id = " & device.DeviceId & vbTab)
End Sub
' Write a message to MessageBlock on the UI thread.
Private Async Sub WriteMessageText(message As String, Optional overwrite As Boolean = False)
Await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
Sub()
If overwrite Then
MessageBlock.Text = message
Else
MessageBlock.Text &= message
End If
End Sub)
End Sub