53 lines
1.2 KiB
C#
53 lines
1.2 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.IO.Ports;
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using System.Linq;
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using System.Timers;
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public sealed class SerialPortWatcher : IDisposable
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{
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private readonly System.Timers.Timer _timer;
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private HashSet<string> _last = new(StringComparer.OrdinalIgnoreCase);
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public event Action<string[]>? PortsAdded;
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public event Action<string[]>? PortsRemoved;
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public SerialPortWatcher(double intervalMs = 1000)
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{
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_timer = new System.Timers.Timer(intervalMs);
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_timer.Elapsed += (_, _) => Tick();
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_timer.AutoReset = true;
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}
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public void Start()
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{
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_last = GetPorts();
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_timer.Start();
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}
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public void Stop() => _timer.Stop();
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private void Tick()
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{
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var current = GetPorts();
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var added = current.Except(_last).ToArray();
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var removed = _last.Except(current).ToArray();
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if (added.Length > 0) PortsAdded?.Invoke(added);
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if (removed.Length > 0) PortsRemoved?.Invoke(removed);
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_last = current;
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}
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private static HashSet<string> GetPorts()
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=> new HashSet<string>(SerialPort.GetPortNames(), StringComparer.OrdinalIgnoreCase);
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public void Dispose()
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{
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_timer.Stop();
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_timer.Dispose();
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}
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}
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