CreateWatcher() | createWatcher() method

DeviceInformation.CreateWatcher() | createWatcher() method

Creates a DeviceWatcher for all devices.

Syntax


var deviceWatcher = Windows.Devices.Enumeration.DeviceInformation.createWatcher();

Parameters

This method has no parameters.

Return value

Type: DeviceWatcher

The created DeviceWatcher.

Remarks

The DeviceWatcher first performs an initial enumeration of devices, raising an Added event for each device that it finds, and raising an EnumerationCompleted event when the initial enumeration is complete. After the initial enumeration is complete, it raises events when a device is added, deleted, or updated.

See the DeviceWatcher class for an example.

Note  An app must subscribe to all of the added, removed, and updated events to be notified when there are device additions, removals or updates. If an app handles only the added event, it will not receive an update if a device is added to the system after the initial device enumeration completes.
 

Requirements (Windows 10 device family)

Device family

Universal, introduced version 10.0.10240.0

API contract

Windows.Foundation.UniversalApiContract, introduced version 1.0

Namespace

Windows.Devices.Enumeration
Windows::Devices::Enumeration [C++]

Metadata

Windows.Foundation.UniversalApiContract.winmd

Requirements (Windows 8.x and Windows Phone 8.x)

Minimum supported client

Windows 8

Minimum supported server

Windows Server 2012

Minimum supported phone

Windows Phone 8.1 [Windows Phone Silverlight 8.1 and Windows Runtime apps]

Namespace

Windows.Devices.Enumeration
Windows::Devices::Enumeration [C++]

Metadata

Windows.winmd

See also

DeviceInformation
CreateWatcher(DeviceClass)
CreateWatcher(String)
CreateWatcher(String, IIterable_1)

 

 

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