ProximityDevice.GetDefault Method
Definition
Important
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Creates an instance of a ProximityDevice class and activates the default proximity provider.
public:
static ProximityDevice ^ GetDefault(); static ProximityDevice GetDefault();public static ProximityDevice GetDefault();function getDefault()Public Shared Function GetDefault () As ProximityDeviceReturns
A new proximity device that uses the default proximity provider. Returns NULL if no proximity devices are installed.
Windows requirements
| App capabilities |
ID_CAP_PROXIMITY [Windows Phone]
proximity
ID_CAP_PROXIMITY [Windows Phone]
|
Examples
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