Windows.Devices.WiFiDirect Namespace

Edit

Contains classes that support connecting to associated Wi-Fi Direct devices and associated endpoints for PCs, tablets, and phones.

Classes

WiFiDirectAdvertisement

Represents a Wi-Fi Direct advertisement and allows the app to control the listen state and custom information elements in the advertisement.
WiFiDirectAdvertisementPublisher

An object to publish Wi-Fi Direct advertisements.
WiFiDirectAdvertisementPublisherStatusChangedEventArgs

Provides data for a StatusChanged event on a WiFiDirectAdvertisementPublisher.
WiFiDirectConnectionListener

Class used to listen for incoming Wi-Fi Direct connection requests.
WiFiDirectConnectionParameters

Used by an app to specify the connection parameters for a Wi-Fi Direct connect/pairing operation.

Sample applications that use this class include the Wi-Fi Direct sample.
WiFiDirectConnectionRequest

A Wi-Fi Direct connection request received by a WiFiDirectConnectionListener.
WiFiDirectConnectionRequestedEventArgs

Provides data for a ConnectionRequested event on a WiFiDirectConnectionListener.
WiFiDirectDevice

Manages connections to associated Wi-Fi Direct devices.
WiFiDirectInformationElement

Represents information elements in a Wi-Fi Direct packet.
WiFiDirectLegacySettings

Settings governing "legacy" mode (non-Wi-Fi Direct connections to the access point being advertised.)

Enums

WiFiDirectAdvertisementListenStateDiscoverability

Specifies whether the Wi-Fi Direct device is listening and discoverable.
WiFiDirectAdvertisementPublisherStatus

Represents the possible states of the WiFiDirectAdvertisementPublisher.
WiFiDirectConfigurationMethod

Specifies a Wi-Fi Direct configuration method. Configuration is how a user tells one piece of Wi-Fi Direct equipment to connect to another piece of Wi-Fi Direct equipment.
WiFiDirectConnectionStatus

Describes the connection status of a WiFiDirectDevice object.
WiFiDirectDeviceSelectorType

Specifies the device selector type for Wi-Fi Direct.
WiFiDirectError

Specifies some common Wi-Fi Direct error cases.
WiFiDirectPairingProcedure

Specifies a direct pairing procedure.

Examples

Windows.Devices.WiFiDirect.WiFiDirectDevice wfdDevice;

private async System.Threading.Tasks.Task<String> Connect(string deviceId)
{
    string result = ""; 

    try
    {
        // No device ID specified.
        if (String.IsNullOrEmpty(deviceId)) { return "Please specify a Wi-Fi Direct device ID."; }

        // Connect to the selected Wi-Fi Direct device.
        wfdDevice = await Windows.Devices.WiFiDirect.WiFiDirectDevice.FromIdAsync(deviceId);

        if (wfdDevice == null)
        {
            result = "Connection to " + deviceId + " failed.";
        }

        // Register for connection status change notification.
        wfdDevice.ConnectionStatusChanged += new TypedEventHandler<Windows.Devices.WiFiDirect.WiFiDirectDevice, object>(OnConnectionChanged);

        // Get the EndpointPair information.
        var EndpointPairCollection = wfdDevice.GetConnectionEndpointPairs();

        if (EndpointPairCollection.Count > 0)
        {
            var endpointPair = EndpointPairCollection[0];
            result = "Local IP address " + endpointPair.LocalHostName.ToString() + 
                " connected to remote IP address " + endpointPair.RemoteHostName.ToString();
        }
        else
        {
           result = "Connection to " + deviceId + " failed.";
        }
    }
    catch (Exception err)
    {
        // Handle error.
        result = "Error occurred: " + err.Message;
    }

    return result;
}

private void OnConnectionChanged(object sender, object arg)
{
    Windows.Devices.WiFiDirect.WiFiDirectConnectionStatus status = 
        (Windows.Devices.WiFiDirect.WiFiDirectConnectionStatus)arg;

    if (status == Windows.Devices.WiFiDirect.WiFiDirectConnectionStatus.Connected)
    {
        // Connection successful.
    }
    else
    {
        // Disconnected.
        Disconnect();
    }
}

private void Disconnect()
{
    if (wfdDevice != null) 
    {
        wfdDevice.Dispose(); 
    }
}

Remarks

You can use the WiFiDirectDevice class to establish a socket connection with other devices that have a Wi-Fi Direct (WFD) capable device. You can call the GetDeviceSelector method to get the device identifier for a Wi-Fi Direct device. Once you have a reference to a WiFiDirectDevice on your computer, you can call the GetConnectionEndpointPairs method to get an EndpointPair object and establish a socket connection using classes in the Windows.Networking.Sockets namespace.

You can add a handler for the ConnectionStatusChanged event to be notified when the connection has been established or disconnected.

Only one app can be connected to a Wi-Fi Direct device at a time.

You must enable the Proximity capability to communicate with Wi-Fi Direct devices.

See also