namespace MainApp
{
    public partial class Form1 : Form
    {
        public static Server socket = null;
        public static ManualResetEvent _shutdownEvent;
        public static Thread _thread, thread2;

        public Form1()
        {
            InitializeComponent();
        }

        public class Server : WebSocketBehavior
        {
            Form1 frm = new Form1();
            FingerprintServer.Form1 fp = new FingerprintServer.Form1();
            TimeSpan waitTime = new TimeSpan(0, 0, 7);
            DateTime waitUntil;
            CancellationTokenSource cancelTokenSource = new CancellationTokenSource();
            CancellationToken token = new CancellationToken();
            Task task2;

            protected override void OnMessage(MessageEventArgs e)
            {
                var msg = e.Data;
                waitUntil = DateTime.Now + waitTime;
                switch (msg)
                {
                    case "InitScanner":
                        //fp.StopBiometricScanner();
                        msg = FingerprintServer.Form1.InitBiometricScanner();
                        Send(msg);
                        break;
                    case "StartScanning":
                        task2 = Task.Factory.StartNew(() =>
                        {

                            while (DateTime.Now < waitUntil)
                            {
                                if (token.IsCancellationRequested)
                                {
                                    Console.WriteLine("Операция прервана");
                                    return;
                                }
                                Send(fp.DoWork());
                            }
                        });
                        break;
                    case "StopScanning":
                        cancelTokenSource.Cancel(); //по вэб сокету приходит флаг StopScanning. Но он не хочет останавливать поток
                        break;
                }

            }

        }

    }
}