Maui- - indicator ifserver is conected

Question

Hi, I want to show if server is conected or not . How is can be done ? which control to use, button is clickable and i want it will be clickable? Thanks,

Answer 1

Hello,

You could monitor the server connection status through data binding and timer callback functions.

Please refer to the following code:

<Label
    Text="{Binding Connection.Connection}"
    Background="{Binding Connection.ConnectionColor}"
    Style="{StaticResource Headline}"/>

 public class ConnectionAble
    {
        public string Connection { get; set; }
        public Color ConnectionColor {  get; set; }
    }
    public class TestViewModel : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler? PropertyChanged;

        private ConnectionAble connection;
        private Timer _timer;

        public ConnectionAble Connection
        {
            get => connection;
            set
            {
                if (connection != value)
                {
                    connection = value;
                    OnPropertyChanged(); // reports this property
                }
            }
        }
        public void OnPropertyChanged([CallerMemberName] string name = "") =>
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
        public TestViewModel()
        {


            // Update the DateTime property every second.
            _timer = new Timer(new TimerCallback(async (x) => await CheckConnection(x)),
                               null, TimeSpan.Zero, TimeSpan.FromSeconds(5));
        }

        private async Task CheckConnection(object state)
        {
            Timer t = (Timer)state;
            if(t != null)
            {
                t.Dispose();
            }
           
            bool isIpViliable = await IsIpReachable("your server ip");
            bool isPortViliable = await IsPortReachable("server ip",port);
            if(isIpViliable && isPortViliable)
            {
                Connection = new ConnectionAble{ Connection = "Connected", ConnectionColor = Color.Parse("Green") };
            }
            else
            {
                Connection = new ConnectionAble{ Connection = "Not Connected", ConnectionColor = Color.Parse("Red") };
            }
           
        }
        public async Task<bool> IsIpReachable(string strIP)
        {
            Ping pingSender = new Ping();
            PingOptions options = new PingOptions();
            // Use the default Ttl value which is 128,
            // but change the fragmentation behavior.
            options.DontFragment = true;
            // Create a buffer of 32 bytes of data to be transmitted.
            string data = "test";
            byte[] buffer = Encoding.ASCII.GetBytes(data);
            int timeout = 1500;
            PingReply reply = pingSender.Send(strIP, timeout, buffer, options);
            return (reply.Status == IPStatus.Success);
        }

        public async Task<bool> IsPortReachable(string host, int port = 80, int msTimeout = 2000)
        {
            return await Task.Run(() =>
            {
                var clientDone = new ManualResetEvent(false);
                var reachable = false;
                var hostEntry = new DnsEndPoint(host, port);
                using (var socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp))
                {
                    var socketEventArg = new SocketAsyncEventArgs { RemoteEndPoint = hostEntry };
                    socketEventArg.Completed += (s, e) =>
                    {
                        reachable = e.SocketError == SocketError.Success;
                        clientDone.Set();
                    };
                    clientDone.Reset();
                    socket.ConnectAsync(socketEventArg);
                    clientDone.WaitOne(msTimeout);
                    return reachable;
                }
            });
        }
    }

Best Regards,

Alec Liu.

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