在Windows服务中不调用计时器tick事件

Question

我有一个窗口服务，它在指定的时间播放声音文件，所以为了做到这一点，我已经采取了Timer但它的Tick事件永远不会被触发，同样在WinForm应用程序中工作。

以下是我服务的代码片段......

public partial class ClockService : ServiceBase
{
    private TimeSpan _alarmTime = new TimeSpan(9, 55, 0);
    private int _snoozeTime = 2; // 2 minutes
    private int _repeatCounter = -1;
    private const int ALARM_REPETITION = 5;
    private string _alarmSoundPath = @"C:\Sound\default.wav";
    private string _alarmLogPath = @"C:\Sound\log.txt";

    public ClockService()
    {
        InitializeComponent();
        alarmTimer.Enabled = true;
    }

    protected override void OnStart(string[] args)
    {
        using (FileStream fileStream = new FileStream(_alarmLogPath, FileMode.OpenOrCreate))
        {
            using (StreamWriter writer = new StreamWriter(fileStream))
            {
                writer.WriteLine("Service has started at {0}", DateTime.Now);
            }
        }
    }

    protected override void OnStop()
    {
        using (FileStream fileStream = new FileStream(_alarmLogPath, FileMode.OpenOrCreate))
        {
            using (StreamWriter writer = new StreamWriter(fileStream))
            {
                writer.WriteLine("Service has stopped at {0}", DateTime.Now);
            }
        }
    }

    private void alarmTimer_Tick(object sender, EventArgs e)
    {
        using (FileStream fileStream = new FileStream(_alarmLogPath, FileMode.OpenOrCreate))
        {
            using (StreamWriter writer = new StreamWriter(fileStream))
            {
                writer.WriteLine("Alarm time is: {0}", _alarmTime);
            }
        }

        TimeSpan currentTime = new TimeSpan(DateTime.Now.TimeOfDay.Hours, DateTime.Now.TimeOfDay.Minutes, DateTime.Now.TimeOfDay.Seconds);


        if (currentTime == _alarmTime)
        {
            using (FileStream fileStream = new FileStream(_alarmLogPath, FileMode.OpenOrCreate))
            {
                using (StreamWriter writer = new StreamWriter(fileStream))
                {
                    writer.WriteLine("Alarm time is: {0} and current time is: {1}", _alarmTime, currentTime);
                }
            }

            _alarmTime = _alarmTime.Add(new TimeSpan(0, _snoozeTime, 0));
            _repeatCounter++;

            if (File.Exists(_alarmSoundPath))
            {
                SoundPlayer player = new SoundPlayer(_alarmSoundPath);
                player.PlayLooping();
            }

        }

        if (_repeatCounter == ALARM_REPETITION)
        {
            _alarmTime = _alarmTime.Subtract(new TimeSpan(0, (ALARM_REPETITION * _snoozeTime), 0));
            _repeatCounter = 0;
        }

    }
}

为了确保我已正确完成所有操作，这是我的InitializeComponent方法

    private void InitializeComponent()
            {
                this.components = new System.ComponentModel.Container();
                this.alarmTimer = new System.Windows.Forms.Timer(this.components);
                this.alarmTimer.Enabled = true;
                this.alarmTimer.Interval = 1000; 
            this.alarmTimer.Tick += new System.EventHandler(this.alarmTimer_Tick);
        this.ServiceName = "PravoAlarmService";
    }

请有人看看并指导我...问题是嘀嗒事件永远不会被解雇..

Answer 1

尝试使用System.Timers.Timer 。

this.alarmTimer = new System.Timers.Timer();

System.Windows.Forms.Timer - 顾名思义 - 适用于Forms应用程序，但不适用于NT服务。

Answer 2

我认为System.Timers.Timer是一个更好的选择：

Timer _timer = new Timer();
// In miliseconds 60000 = 1 minute
// This timer will tick every 1 minute
_timer.Interval += 6000;
// Activate the timer
_timer.Enabled = true;
// When timer "tick"
_timer.Elapsed += new ElapsedEventHandler(_timer_Elapsed);

Answer 3

不要使用System.Windows.FOrms.Timer，使用System.Threading.Timer。

服务不是表格。

Answer 4

尝试使用其他Timer :) 这里有区别

Answer 5

你确定这是问题的计时器吗？ Windows服务访问音响系统是非常不寻常的（如何将其关闭？）它可能被阻止或者可能需要启用“与桌面交互”。

话虽如此，TomTom是对的，Forms Timers是关于能够使用你没有的UI线程，而不是使用线程计时器。