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POConnect socket under lock screen on Windows Phone
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  1. POConnect socket under lock screen on Windows Phone
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    copied!<p>I try to write application that connects to a server with a sockets. All works fine, but when application is running under lock screen the socket can't connect (it is waiting while lock screen is removed).</p> <p>Device connected to a PC, so WiFi should not have an impact (auto turn-off) for battery-saving</p> <p>How to reproduce (code below):</p> <p>1) Start application and wait 30 seconds. In Debug windows you will see:</p> <pre><code>Try to connect at 15:35:08 Connected at 15:35:08 </code></pre> <p>2) Start application, lock the screen and wait 30 seconds. In Debug windows you will see:</p> <pre><code>Try to connect at 15:36:07 Connected at 15:36:42 </code></pre> <p>So, during lock screen nothing happens, socket is frozen</p> <p>This is my code my:</p> <pre><code> 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) =&gt; { if (e.SocketError == SocketError.Success &amp;&amp; e.ConnectSocket.Connected) { Debug.WriteLine("Connected at " + DateTime.Now.ToLongTimeString()); } }; DispatcherTimer Timer = new DispatcherTimer() { Interval = TimeSpan.FromSeconds(10) }; Timer.Tick += (s, e) =&gt; { Debug.WriteLine("Try to connect at " + DateTime.Now.ToLongTimeString()); socket.ConnectAsync(socketOperationEventArguments); Timer.Stop(); }; Timer.Start(); } </code></pre> <p>EDIT:</p> <p>Send data is also not working under lock screen. Log:</p> <pre><code>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 </code></pre> <p>Screen was locked from 10:18:43 to 10:18:50</p>
 

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