c# - 在暂停/恢复 PC 时，让 Windows 服务正常停止和启动的正确方法是什么？

Question

当电脑关机进入挂起模式时，我需要停止我们的 Windows 服务，并在电脑再次恢复时重新启动它。这样做的正确方法是什么？

Answer 1

您应该覆盖ServiceBase.OnPowerEvent 方法。

protected override bool OnPowerEvent(PowerBroadcastStatus powerStatus)
{
    if (powerStatus.HasFlag(PowerBroadcastStatus.QuerySuspend))
    { 

    }

    if (powerStatus.HasFlag(PowerBroadcastStatus.ResumeSuspend))
    {

    }
    return base.OnPowerEvent(powerStatus);
}

PowerBroadcastStatus枚举解释了电源状态。此外，您需要将ServiceBase.CanHandlePowerEvent 属性设置为true.

protected override void OnStart(string[] args)
{
    this.CanHandlePowerEvent = true;
}

Answer 2

评论 Alex Filipovici 答案于 2013 年 5 月 16 日 17:05 编辑：

CanHandlePowerEvent = true; 

必须在构造函数中设置

设置它OnStart()为时已晚并导致此异常：

Service cannot be started. System.InvalidOperationException: Cannot change CanStop, CanPauseAndContinue,     CanShutdown, CanHandlePowerEvent, or CanHandleSessionChangeEvent property values after the service has been started.
   at System.ServiceProcess.ServiceBase.set_CanHandlePowerEvent(Boolean value)
   at foo.bar.OnStart(String[] args)
   at System.ServiceProcess.ServiceBase.ServiceQueuedMainCallback(Object state)

Answer 3

这是 Windows 服务的功能之一。

关闭

PC 关机时自动关机。无需做任何事情。要进行任何清理，您需要覆盖ServiceBase类型方法，例如OnPowerEvent，示例

public class WinService : ServiceBase
{
    protected override void OnStart(string[] args)
    {
        ...
    }

    protected override void OnStop()
    {
        ...
    }

    protected override bool OnPowerEvent(PowerBroadcastStatus powerStatus)
    {
            ...
    }
}

开始

要自动启动服务，您需要将其设置为ServiceStartMode.Automaticlike here

[RunInstaller(true)]
public class WindowsServiceInstaller : Installer
{
    private readonly ServiceProcessInstaller _process;
    private readonly ServiceInstaller _service;

    public WindowsServiceInstaller()
    {
        _process = new ServiceProcessInstaller
        {
            Account = ServiceAccount.LocalSystem
        };
        _service = new ServiceInstaller
        {
            ServiceName = "FOO",
            StartType = ServiceStartMode.Automatic, // <<<HERE
            Description = "Foo service"
        };
        Installers.Add(_process);
        Installers.Add(_service);
    }
}

Answer 4

您可以简单地停止处理，而不是停止您的服务，例如......

Microsoft.Win32.SystemEvents.PowerModeChanged += this.SystemEvents_PowerModeChanged;

    private void SystemEvents_PowerModeChanged(object sender, Microsoft.Win32.PowerModeChangedEventArgs e)
    {
        if (e.Mode == PowerModes.Suspend)
            {

            }

        if (e.Mode == PowerModes.Resume)
            {

            }
    }