PeerFinder.ConnectAsync(PeerInformation) Metode
Definisi
Penting
Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.
Menyambungkan ke serekan yang ditemukan oleh panggilan ke metode FindAllPeersAsync .
public:
static IAsyncOperation<StreamSocket ^> ^ ConnectAsync(PeerInformation ^ peerInformation);
/// [Windows.Foundation.Metadata.RemoteAsync]
static IAsyncOperation<StreamSocket> ConnectAsync(PeerInformation const& peerInformation);
[Windows.Foundation.Metadata.RemoteAsync]
public static IAsyncOperation<StreamSocket> ConnectAsync(PeerInformation peerInformation);
function connectAsync(peerInformation)
Public Shared Function ConnectAsync (peerInformation As PeerInformation) As IAsyncOperation(Of StreamSocket)
Parameter
- peerInformation
- PeerInformation
Objek informasi serekan yang mewakili peer untuk disambungkan.
Mengembalikan
Operasi asinkron untuk menyambungkan ke peer jarak jauh menggunakan objek StreamSocket yang disediakan.
- Atribut
Persyaratan Windows
Kemampuan aplikasi |
ID_CAP_NETWORKING [Windows Phone]
ID_CAP_NETWORKING [Windows Phone]
proximity
ID_CAP_PROXIMITY [Windows Phone]
|
Contoh
protected override void OnNavigatedTo(NavigationEventArgs e)
{
DisplayNameTextBox.Text = Windows.Networking.Proximity.PeerFinder.DisplayName;
Windows.Networking.Proximity.PeerFinder.ConnectionRequested += ConnectionRequested;
// If activated from launch or from the background, create a peer connection.
var args = e.Parameter as Windows.ApplicationModel.Activation.LaunchActivatedEventArgs;
if (args != null && args.Kind == Windows.ApplicationModel.Activation.ActivationKind.Launch)
{
if (args.Arguments == "Windows.Networking.Proximity.PeerFinder:StreamSocket")
{
AdvertiseForPeersButton_Click(null, null);
}
}
}
protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
if (_started)
{
// Detach the callback handler (there can only be one PeerConnectProgress handler).
Windows.Networking.Proximity.PeerFinder.TriggeredConnectionStateChanged -= TriggeredConnectionStateChanged;
// Detach the incoming connection request event handler.
Windows.Networking.Proximity.PeerFinder.ConnectionRequested -= ConnectionRequested;
Windows.Networking.Proximity.PeerFinder.Stop();
CloseSocket();
_started = false;
}
}
// 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;
});
}
bool _started = false;
// Click event handler for "Advertise" button.
private void AdvertiseForPeersButton_Click(object sender, RoutedEventArgs e)
{
if (_started)
{
WriteMessageText("You are already advertising for a connection.\n");
return;
}
Windows.Networking.Proximity.PeerFinder.DisplayName = DisplayNameTextBox.Text;
if ((Windows.Networking.Proximity.PeerFinder.SupportedDiscoveryTypes &
Windows.Networking.Proximity.PeerDiscoveryTypes.Triggered) ==
Windows.Networking.Proximity.PeerDiscoveryTypes.Triggered)
{
Windows.Networking.Proximity.PeerFinder.TriggeredConnectionStateChanged +=
TriggeredConnectionStateChanged;
WriteMessageText("You can tap to connect a peer device that is " +
"also advertising for a connection.\n");
}
else
{
WriteMessageText("Tap to connect is not supported.\n");
}
if ((Windows.Networking.Proximity.PeerFinder.SupportedDiscoveryTypes &
Windows.Networking.Proximity.PeerDiscoveryTypes.Browse) !=
Windows.Networking.Proximity.PeerDiscoveryTypes.Browse)
{
WriteMessageText("Peer discovery using Wi-Fi Direct is not supported.\n");
}
Windows.Networking.Proximity.PeerFinder.Start();
_started = true;
}
private void TriggeredConnectionStateChanged(
object sender,
Windows.Networking.Proximity.TriggeredConnectionStateChangedEventArgs e)
{
if (e.State == Windows.Networking.Proximity.TriggeredConnectState.PeerFound)
{
WriteMessageText("Peer found. You may now pull your devices out of proximity.\n");
}
if (e.State == Windows.Networking.Proximity.TriggeredConnectState.Completed)
{
WriteMessageText("Connected. You may now send a message.\n");
SendMessage(e.Socket);
}
}
// Click event handler for "Browse" button.
async private void FindPeersButton_Click(object sender, RoutedEventArgs e)
{
if ((Windows.Networking.Proximity.PeerFinder.SupportedDiscoveryTypes &
Windows.Networking.Proximity.PeerDiscoveryTypes.Browse) !=
Windows.Networking.Proximity.PeerDiscoveryTypes.Browse)
{
WriteMessageText("Peer discovery using Wi-Fi Direct is not supported.\n");
return;
}
try
{
var peerInfoCollection = await Windows.Networking.Proximity.PeerFinder.FindAllPeersAsync();
if (peerInfoCollection.Count > 0)
{
// Connect to first peer found - example only.
// In your app, provide the user with a list of available peers.
ConnectToPeer(peerInfoCollection[0]);
}
}
catch (Exception err)
{
WriteMessageText("Error finding peers: " + err.Message + "\n");
}
}
async private void ConnectToPeer(Windows.Networking.Proximity.PeerInformation peerInfo)
{
WriteMessageText("Peer found. Connecting to " + peerInfo.DisplayName + "\n");
try
{
Windows.Networking.Sockets.StreamSocket socket =
await Windows.Networking.Proximity.PeerFinder.ConnectAsync(peerInfo);
WriteMessageText("Connection successful. You may now send messages.\n");
SendMessage(socket);
}
catch (Exception err)
{
WriteMessageText("Connection failed: " + err.Message + "\n");
}
requestingPeer = null;
}
// Click event handler for "Stop" button.
private void StopFindingPeersButton_Click(object sender, RoutedEventArgs e)
{
_started = false;
Windows.Networking.Proximity.PeerFinder.Stop();
if (proximitySocket != null) { CloseSocket(); }
}
// Handle external connection requests.
Windows.Networking.Proximity.PeerInformation requestingPeer;
private void ConnectionRequested(object sender,
Windows.Networking.Proximity.ConnectionRequestedEventArgs e)
{
requestingPeer = e.PeerInformation;
WriteMessageText("Connection requested by " + requestingPeer.DisplayName + ". " +
"Click 'Accept Connection' to connect.");
}
private void AcceptConnectionButton_Click(object sender, RoutedEventArgs e)
{
if (requestingPeer == null)
{
WriteMessageText("No peer connection has been requested.");
return;
}
ConnectToPeer(requestingPeer);
}
Protected Overrides Sub OnNavigatedTo(e As Navigation.NavigationEventArgs)
DisplayNameTextBox.Text = Windows.Networking.Proximity.PeerFinder.DisplayName
AddHandler Windows.Networking.Proximity.PeerFinder.ConnectionRequested, AddressOf ConnectionRequested
' If activated from launch or from the background, create a peer connection.
Dim args = TryCast(e.Parameter, Windows.ApplicationModel.Activation.LaunchActivatedEventArgs)
If args IsNot Nothing AndAlso args.Kind = Windows.ApplicationModel.Activation.ActivationKind.Launch Then
If args.Arguments = "Windows.Networking.Proximity.PeerFinder:StreamSocket" Then
AdvertiseForPeersButton_Click()
End If
End If
End Sub
Protected Overrides Sub OnNavigatingFrom(e As Navigation.NavigatingCancelEventArgs)
If _started Then
' Detach the callback handler (there can only be one PeerConnectProgress handler).
RemoveHandler Windows.Networking.Proximity.PeerFinder.TriggeredConnectionStateChanged, AddressOf TriggeredConnectionStateChanged
' Detach the incoming connection request event handler.
RemoveHandler Windows.Networking.Proximity.PeerFinder.ConnectionRequested, AddressOf ConnectionRequested
Windows.Networking.Proximity.PeerFinder.Stop()
CloseSocket()
_started = False
End If
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
Private _started As Boolean = False
' Click event handler for "Advertise" button.
Private Sub AdvertiseForPeersButton_Click()
If _started Then
WriteMessageText("You are already advertising for a connection." & vbCrLf)
Return
End If
Windows.Networking.Proximity.PeerFinder.DisplayName = DisplayNameTextBox.Text
If ((Windows.Networking.Proximity.PeerFinder.SupportedDiscoveryTypes And
Windows.Networking.Proximity.PeerDiscoveryTypes.Triggered) =
Windows.Networking.Proximity.PeerDiscoveryTypes.Triggered) Then
AddHandler Windows.Networking.Proximity.PeerFinder.TriggeredConnectionStateChanged,
AddressOf TriggeredConnectionStateChanged
WriteMessageText("You can tap to connect a peer device that is " &
"also advertising for a connection." & vbCrLf)
Else
WriteMessageText("Tap to connect is not supported." & vbCrLf)
End If
If (Windows.Networking.Proximity.PeerFinder.SupportedDiscoveryTypes And
Windows.Networking.Proximity.PeerDiscoveryTypes.Browse) <>
Windows.Networking.Proximity.PeerDiscoveryTypes.Browse Then
WriteMessageText("Peer discovery using Wifi-Direct is not supported." & vbCrLf)
End If
Windows.Networking.Proximity.PeerFinder.Start()
_started = True
End Sub
Private Sub TriggeredConnectionStateChanged(
sender As Object,
e As Windows.Networking.Proximity.TriggeredConnectionStateChangedEventArgs)
If e.State = Windows.Networking.Proximity.TriggeredConnectState.PeerFound Then
WriteMessageText("Peer found. You may now pull your devices out of proximity." & vbCrLf)
End If
If e.State = Windows.Networking.Proximity.TriggeredConnectState.Completed Then
WriteMessageText("Connected. You may now send a message." & vbCrLf)
SendMessage(e.Socket)
End If
End Sub
' Click event handler for "Browse" button.
Private Async Sub FindPeersButton_Click()
If (Windows.Networking.Proximity.PeerFinder.SupportedDiscoveryTypes And
Windows.Networking.Proximity.PeerDiscoveryTypes.Browse) <>
Windows.Networking.Proximity.PeerDiscoveryTypes.Browse Then
WriteMessageText("Peer discovery using Wifi-Direct is not supported." & vbCrLf)
Return
End If
Try
Dim peerInfoCollection = Await Windows.Networking.Proximity.PeerFinder.FindAllPeersAsync()
If peerInfoCollection.Count > 0 Then
' Connect to first peer found - example only.
' In your app, provide the user with a list of available peers.
ConnectToPeer(peerInfoCollection(0))
End If
Catch err As Exception
WriteMessageText("Error finding peers: " & err.Message & vbCrLf)
End Try
End Sub
Private Async Sub ConnectToPeer(peerInfo As Windows.Networking.Proximity.PeerInformation)
WriteMessageText("Peer found. Connecting to " & peerInfo.DisplayName & vbCrLf)
Try
Dim socket = Await Windows.Networking.Proximity.PeerFinder.ConnectAsync(peerInfo)
WriteMessageText("Connection successful. You may now send messages." & vbCrLf)
SendMessage(socket)
Catch err As Exception
WriteMessageText("Connection failed: " & err.Message & vbCrLf)
End Try
requestingPeer = Nothing
End Sub
' Click event handler for "Stop" button.
Private Sub StopFindingPeersButton_Click()
_started = False
Windows.Networking.Proximity.PeerFinder.Stop()
If proximitySocket IsNot Nothing Then CloseSocket()
End Sub
' Handle external connection requests.
Private requestingPeer As Windows.Networking.Proximity.PeerInformation
Private Sub ConnectionRequested(sender As Object,
e As Windows.Networking.Proximity.ConnectionRequestedEventArgs)
requestingPeer = e.PeerInformation
WriteMessageText("Connection requested by " & requestingPeer.DisplayName & ". " &
"Click 'Accept Connection' to connect.")
End Sub
Private Sub AcceptConnectionButton_Click()
If requestingPeer Is Nothing Then
WriteMessageText("No peer connection has been requested.")
Return
End If
ConnectToPeer(requestingPeer)
End Sub
Keterangan
Anda dapat memperoleh instans objek PeerInformation untuk peer dari panggilan ke metode FindAllPeersAsync , atau di handler untuk peristiwa ConnectionRequested .
Jika aplikasi memanggil metode ConnectAsync untuk membuat koneksi dengan serekan, aplikasi tidak akan lagi beriklan untuk koneksi dan tidak akan ditemukan oleh metode FindAllPeersAsync sampai aplikasi memanggil metode Tutup untuk menutup koneksi soket.
Jika Anda membuka koneksi soket dengan memanggil metode ConnectAsync, hanya satu koneksi soket yang dapat terbuka pada satu waktu untuk komputer. Jika aplikasi Anda, atau aplikasi lain memanggil metode ConnectAsync, koneksi soket yang ada akan ditutup.
Pengecualian Akses Ditolak akan ditampilkan jika Anda mencoba memanggil ConnectAsync saat aplikasi Anda berada di latar belakang.
Penting
API Kedekatan tidak menyediakan autentikasi. Anda harus menghindari pertukaran data sensitif dengan API ini.
Windows Phone 8
Wi-Fi Direct tidak didukung pada Windows Phone 8.
Berlaku untuk
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