通过

ProximityDevice.DeviceDeparted 事件

  • 参考

定义

命名空间:
Windows.Networking.Proximity
编辑

当设备离开近似范围时发生。

public:
 virtual event DeviceDepartedEventHandler ^ DeviceDeparted;
// Register
event_token DeviceDeparted(DeviceDepartedEventHandler const& handler) const;

// Revoke with event_token
void DeviceDeparted(event_token const* cookie) const;

// Revoke with event_revoker
ProximityDevice::DeviceDeparted_revoker DeviceDeparted(auto_revoke_t, DeviceDepartedEventHandler const& handler) const;
public event DeviceDepartedEventHandler DeviceDeparted;
function onDeviceDeparted(eventArgs) { /* Your code */ }
proximityDevice.addEventListener("devicedeparted", onDeviceDeparted);
proximityDevice.removeEventListener("devicedeparted", onDeviceDeparted);
- or -
proximityDevice.ondevicedeparted = onDeviceDeparted;
Public Custom Event DeviceDeparted As DeviceDepartedEventHandler

事件类型

DeviceDepartedEventHandler

Windows 要求

应用功能
ID_CAP_PROXIMITY [Windows Phone] proximity ID_CAP_PROXIMITY [Windows Phone]

示例

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

适用于

另请参阅