Eth*_*n.S 3 .net c# winapi .net-4.5 windows-10
我有一个在 .net 4.5(仅)上运行的控制台应用程序。我试图检测计算机何时从睡眠/休眠模式返回。我尝试使用,Win32.SystemEvents.PowerModeChanged
但由于某种原因它不起作用...我使用运行 Windows 10 的 ThinkPad 笔记本电脑,当我拔下充电线时,它确实会触发带有参数 Mode = 的事件PowerModes.StatusChange
。
class Program
{
static void Main(string[] args)
{
SystemEvents.PowerModeChanged += new PowerModeChangedEventHandler(SystemEvents_PowerModeChanged);
Console.WriteLine("This application is waiting for system events.");
Console.WriteLine("Press <Enter> to terminate this application.");
Console.ReadLine();
}
private static void SystemEvents_PowerModeChanged(object sender, PowerModeChangedEventArgs e)
{
Console.WriteLine(Enum.GetName(typeof(PowerModes), e.Mode));
File.WriteAllText("test.txt", "test");
}
}
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尝试打印到屏幕并写入文件,无法使其工作......
如果有人有想法或不同的方法,最后我需要捕捉计算机何时从睡眠或休眠状态返回。
解决了:
从 Windows 10 开始,微软添加了现代待机功能,扩展了 Windows 8.1 连接待机电源模型。
SystemEvents.PowerModeChanged
.net 4.5 中仅支持传统睡眠和休眠 (S1-4)。
从 Windows 10 版本 2004 开始,现代待机被强制且无法禁用,SystemEvents.PowerModeChanged
在我的情况下毫无用处。
此处引用了用于处理现代待机电源模式更改的新 Win32 API: PowerRegisterSuspendResumeNotification 函数 MSDN
不幸的是,我没有找到新 API 的完整 C# 实现。
User32.dll
Soo 我自己使用Dahall (GitHub) 的 Vanara 项目PowrPorf.dll
的C# 包装器制作了一个:
public static class SystemPowerNotifications
{
public static event SystemPowerNotificationEventHandler PowerModeChanged
{
add
{
_powerModeChanged += value;
if (_eventHandler == null)
{
var result = PowrProf.PowerRegisterSuspendResumeNotification(PowrProf.RegisterSuspendResumeNotificationFlags.DEVICE_NOTIFY_CALLBACK,
_dnsp, out _eventHandler);
if (result != Win32Error.ERROR_SUCCESS)
throw new Exception();
}
}
remove
{
_powerModeChanged -= value;
if(_powerModeChanged.GetInvocationList().Length == 0)
{
if (PowrProf.PowerUnregisterSuspendResumeNotification(_eventHandler) != Win32Error.NO_ERROR)
throw new Exception();
_eventHandler.Dispose();
_eventHandler = null;
}
}
}
private static PowrProf.SafeHPOWERNOTIFY _eventHandler;
private static PowrProf.DEVICE_NOTIFY_SUBSCRIBE_PARAMETERS _dnsp = new PowrProf.DEVICE_NOTIFY_SUBSCRIBE_PARAMETERS
{
Callback = OnDeviceNotify,
Context = IntPtr.Zero
};
private static Win32Error OnDeviceNotify(IntPtr context, uint type, IntPtr setting)
{
_powerModeChanged?.Invoke(null,new PowerNotificationArgs((PowerBroadcastType)type));
return 0;
}
private static SystemPowerNotificationEventHandler _powerModeChanged;
}
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完整源代码: SystemPowerModeNotification-dotnet4.5 (GitHub)
编辑:
在 Windows 服务中使用它时,注册的回调函数PowerRegisterSuspendResumeNotification
仅在进入休眠模式时才会触发,而在现代待机睡眠/监视器关闭时不会触发。
您需要注册到RegisterPowerSettingNotification
此处引用的不同通知:注册电源事件 MSDN
以及检查PowerEvent
监视器状态。请记住,即使计算机进入显示器关闭/打开状态而不进入睡眠模式,也会发生这种情况。
注册示例:
public static event SystemPowerNotificationEventHandler PowerModeChanged
{
add
{
_powerModeChanged += value;
if (_powerEventHandler == null)
{
if (!string.IsNullOrEmpty(ServiceName))
{
if (_ssh.IsNull)
_ssh = AdvApi32.RegisterServiceCtrlHandlerEx(ServiceName, OnDisplayNotify);
if (_ssh.IsNull)
throw new Exception("Failed To Register ServiceCtrlHandlerEx");
_displayEventHandler = User32.RegisterPowerSettingNotification(((IntPtr)_ssh), PowrProf.GUID_MONITOR_POWER_ON, User32.DEVICE_NOTIFY.DEVICE_NOTIFY_SERVICE_HANDLE);
if (_displayEventHandler.IsNull)
throw new Exception("Failed To Register PowerSettingNotification");
}
var result = PowrProf.PowerRegisterSuspendResumeNotification(PowrProf.RegisterSuspendResumeNotificationFlags.DEVICE_NOTIFY_CALLBACK,
_dnsp, out _powerEventHandler);
if (result != Win32Error.ERROR_SUCCESS)
throw new Exception("Failed To Register PowerSuspendResumeNotification");
}
}
remove
{
_powerModeChanged -= value;
if (_powerModeChanged == null)
{
if (!string.IsNullOrEmpty(ServiceName))
{
if (!User32.UnregisterPowerSettingNotification(_displayEventHandler))
throw new Exception("Failed To Unregister PowerSettingNotification");
_displayEventHandler.Dispose();
_displayEventHandler = null;
}
if (PowrProf.PowerUnregisterSuspendResumeNotification(_powerEventHandler) != Win32Error.NO_ERROR)
throw new Exception("Failed To Unregister PowerSuspendResumeNotification");
_powerEventHandler.Dispose();
_powerEventHandler = null;
}
}
}
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回调示例:
private static Win32Error OnDisplayNotify(AdvApi32.ServiceControl control,uint eventType,IntPtr eventData,IntPtr context)
{
var dataHandle = new HANDLE(eventData);
var contextHandle = new HANDLE(context);
if(control == AdvApi32.ServiceControl.SERVICE_CONTROL_POWEREVENT)
{
POWERBRODCAST_SETTING settings = (POWERBRODCAST_SETTING)Marshal.PtrToStructure(eventData, typeof(POWERBRODCAST_SETTING));
_powerModeChanged?.Invoke(null, new PowerNotificationArgs((PowerBroadcastType)eventType,settings.Data));
}
return 0;
}
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