Windows Phone 锁屏下连接插座

我尝试编写使用套接字连接到服务器的应用程序。一切正常，但是当应用程序在锁屏下运行时，套接字无法连接（它正在等待锁屏被删除）。

设备连接到 PC，因此 WiFi 不应影响（自动关闭）以节省电池电量

如何重现（代码如下）：

1) 启动应用程序并等待 30 秒。在调试窗口中您将看到：

Try to connect at 15:35:08
Connected at 15:35:08

2) 启动应用程序，锁定屏幕并等待 30 秒。在调试窗口中您将看到：

Try to connect at 15:36:07
Connected at 15:36:42

因此，在锁定屏幕期间没有任何反应，套接字被冻结

这是我的代码：

    public MainPage()
    {
        InitializeComponent();

        PhoneApplicationService.Current.ApplicationIdleDetectionMode = IdleDetectionMode.Disabled;

        DnsEndPoint dnsEndPoint = new DnsEndPoint("stackoverflow.com", 80);
        Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        SocketAsyncEventArgs socketOperationEventArguments = new SocketAsyncEventArgs();
        socketOperationEventArguments.RemoteEndPoint = dnsEndPoint;
        socketOperationEventArguments.Completed += (s, e) =>
        {
            if (e.SocketError == SocketError.Success && e.ConnectSocket.Connected)
            {
                Debug.WriteLine("Connected at " + DateTime.Now.ToLongTimeString());
            }
        };

        DispatcherTimer Timer = new DispatcherTimer()
        {
            Interval = TimeSpan.FromSeconds(10)
        };
        Timer.Tick += (s, e) =>
        {
            Debug.WriteLine("Try to connect at " + DateTime.Now.ToLongTimeString());
            socket.ConnectAsync(socketOperationEventArguments);

            Timer.Stop();
        };
        Timer.Start();
    }

EDIT:

在锁定屏幕下也无法发送数据。日志：

Try to connect at 10:18:39
Connected at 10:18:39
Try to send at 10:18:40
Send data at 10:18:40
Try to send at 10:18:41
Send data at 10:18:41
Try to send at 10:18:42
Send data at 10:18:42
Try to send at 10:18:43
Try to send at 10:18:44
Try to send at 10:18:45
Try to send at 10:18:46
Try to send at 10:18:47
Try to send at 10:18:48
Try to send at 10:18:49
Send data at 10:18:50
Send data at 10:18:50
Send data at 10:18:50
Send data at 10:18:50
Send data at 10:18:50
Send data at 10:18:50
Send data at 10:18:50
Try to send at 10:18:51
Send data at 10:18:51
Try to send at 10:18:52
Send data at 10:18:52

10:18:43 至 10:18:50 屏幕被锁定

在 Mango 中激活锁屏时，套接字不会接收任何数据。 目前尚无已知的解决方法。

在这里查看更多信息：

http://irc7.org/index.php/2011/09/07/why-doesnt-irc7-run-under-lock-screen/ http://irc7.org/index.php/2011/09/07/why-doesnt-irc7-run-under-lock-screen/

您可以做的就是首先尝试阻止锁定屏幕出现。 有关如何执行此操作的更多信息，请参阅此处：

http://msdn.microsoft.com/en-us/library/microsoft.phone.shell.phoneapplicationservice.useridledetectionmode%28VS.92%29.aspx http://msdn.microsoft.com/en-us/library/microsoft.phone.shell.phoneapplicationservice.useridledetectionmode%28VS.92%29.aspx