检测笔记本电脑盖子的关闭和打开

Question

是否可以检测笔记本电脑的盖子何时打开或关闭？从我读到的内容来看，这是不可能的，但 SO 之前已经帮助我完成了不可能的任务。

我发现唯一可能正确的方向是 有关报告电源按钮所需的 IOCTL 的 MSDN 博客文章。是否可以像操作系统调用它们那样“嗅探”它们？

我正在使用 VB.NET，但会接受任何语言的建议。感谢您的时间和建议。

编辑：我的软件将（最终）覆盖盖子关闭时发生的操作（基于用户偏好），因此监听盖子关闭时通常发生的暂停和其他操作是“ t 一个选项。

Answer 1

WPF 应用程序的完整工作 C# 代码，显示如何侦听盖子打开/关闭事件：

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        [DllImport(@"User32", SetLastError = true, EntryPoint = "RegisterPowerSettingNotification",
            CallingConvention = CallingConvention.StdCall)]

        private static extern IntPtr RegisterPowerSettingNotification(IntPtr hRecipient, ref Guid PowerSettingGuid,
            Int32 Flags);

        internal struct POWERBROADCAST_SETTING
        {
            public Guid PowerSetting;
            public uint DataLength;
            public byte Data;
        }

        Guid GUID_LIDSWITCH_STATE_CHANGE = new Guid(0xBA3E0F4D, 0xB817, 0x4094, 0xA2, 0xD1, 0xD5, 0x63, 0x79, 0xE6, 0xA0, 0xF3);
        const int DEVICE_NOTIFY_WINDOW_HANDLE = 0x00000000;
        const int WM_POWERBROADCAST = 0x0218;
        const int PBT_POWERSETTINGCHANGE = 0x8013;

        private bool? _previousLidState = null;

        public MainWindow()
        {
            InitializeComponent();
            this.SourceInitialized += MainWindow_SourceInitialized;
        }

        void MainWindow_SourceInitialized(object sender, EventArgs e)
        {
            RegisterForPowerNotifications();
            IntPtr hwnd = new WindowInteropHelper(this).Handle;
            HwndSource.FromHwnd(hwnd).AddHook(new HwndSourceHook(WndProc));
        }

        private void RegisterForPowerNotifications()
        {
            IntPtr handle = new WindowInteropHelper(Application.Current.Windows[0]).Handle;
            IntPtr hLIDSWITCHSTATECHANGE = RegisterPowerSettingNotification(handle,
                 ref GUID_LIDSWITCH_STATE_CHANGE,
                 DEVICE_NOTIFY_WINDOW_HANDLE);
        }

        IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
        {
            switch (msg)
            {
                case WM_POWERBROADCAST:
                    OnPowerBroadcast(wParam, lParam);
                    break;
                default:
                    break;
            }
            return IntPtr.Zero;
        }

        private void OnPowerBroadcast(IntPtr wParam, IntPtr lParam)
        {
            if ((int)wParam == PBT_POWERSETTINGCHANGE)
            {
                POWERBROADCAST_SETTING ps = (POWERBROADCAST_SETTING)Marshal.PtrToStructure(lParam, typeof(POWERBROADCAST_SETTING));
                IntPtr pData = (IntPtr)((int)lParam + Marshal.SizeOf(ps));
                Int32 iData = (Int32)Marshal.PtrToStructure(pData, typeof(Int32));
                if (ps.PowerSetting == GUID_LIDSWITCH_STATE_CHANGE)
                {
                    bool isLidOpen = ps.Data != 0;

                    if (!isLidOpen == _previousLidState)
                    {
                        LidStatusChanged(isLidOpen);
                    }

                    _previousLidState = isLidOpen;
                }
            }
        }

        private void LidStatusChanged(bool isLidOpen)
        {
            if (isLidOpen)
            {
                //Do some action on lid open event
                Debug.WriteLine("{0}: Lid opened!", DateTime.Now);
            }
            else
            {
                //Do some action on lid close event
                Debug.WriteLine("{0}: Lid closed!", DateTime.Now);
            }
        }
    }
}

Answer 2

使用 WM_POWERBROADCAST。以下链接可以为您提供帮助： 合盖操作更改通知

Answer 3

请记住，大多数笔记本电脑在合上盖子时都会按下按钮。该按钮通常只是一个睡眠按钮。 WMI 类公开 ACPI，您最好使用 PowerManagement 类。不幸的是，当操作系统设置为“不执行任何操作”时，该类不会引发事件。解决这个问题的唯一方法是使用 DDK（驱动程序开发工具包）创建一个过滤器来拦截 IOCTL_GET_SYS_BUTTON_EVENT 事件。以下两个链接可帮助您入门：

链接

和

http://support.microsoft.com/kb/ 302092

Answer 4

这是一个解决方案；

https:// www.codeproject.com/Tips/480049/Shut-Down-Restart-Log-off-or-Lock-your-computer-in

我做到了；

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        [DllImport(@"User32", SetLastError = true, EntryPoint = "RegisterPowerSettingNotification",
            CallingConvention = CallingConvention.StdCall)]

        private static extern IntPtr RegisterPowerSettingNotification(IntPtr hRecipient, ref Guid PowerSettingGuid,
            Int32 Flags);

        internal struct POWERBROADCAST_SETTING
        {
            public Guid PowerSetting;
            public uint DataLength;
            public byte Data;
        }

        Guid GUID_LIDSWITCH_STATE_CHANGE = new Guid(0xBA3E0F4D, 0xB817, 0x4094, 0xA2, 0xD1, 0xD5, 0x63, 0x79, 0xE6, 0xA0, 0xF3);
        const int DEVICE_NOTIFY_WINDOW_HANDLE = 0x00000000;
        const int WM_POWERBROADCAST = 0x0218;
        const int PBT_POWERSETTINGCHANGE = 0x8013;

        private bool? _previousLidState = null;

        public MainWindow()
        {
            InitializeComponent();
            this.SourceInitialized += MainWindow_SourceInitialized;
        }

        void MainWindow_SourceInitialized(object sender, EventArgs e)
        {
            RegisterForPowerNotifications();
            IntPtr hwnd = new WindowInteropHelper(this).Handle;
            HwndSource.FromHwnd(hwnd).AddHook(new HwndSourceHook(WndProc));
        }

        private void RegisterForPowerNotifications()
        {
            IntPtr handle = new WindowInteropHelper(Application.Current.Windows[0]).Handle;
            IntPtr hLIDSWITCHSTATECHANGE = RegisterPowerSettingNotification(handle,
                 ref GUID_LIDSWITCH_STATE_CHANGE,
                 DEVICE_NOTIFY_WINDOW_HANDLE);
        }

        IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
        {
            switch (msg)
            {
                case WM_POWERBROADCAST:
                    OnPowerBroadcast(wParam, lParam);
                    break;
                default:
                    break;
            }
            return IntPtr.Zero;
        }

        private void OnPowerBroadcast(IntPtr wParam, IntPtr lParam)
        {
            if ((int)wParam == PBT_POWERSETTINGCHANGE)
            {
                POWERBROADCAST_SETTING ps = (POWERBROADCAST_SETTING)Marshal.PtrToStructure(lParam, typeof(POWERBROADCAST_SETTING));
                IntPtr pData = (IntPtr)((int)lParam + Marshal.SizeOf(ps));
                Int32 iData = (Int32)Marshal.PtrToStructure(pData, typeof(Int32));
                if (ps.PowerSetting == GUID_LIDSWITCH_STATE_CHANGE)
                {
                    bool isLidOpen = ps.Data != 0;

                    if (!isLidOpen == _previousLidState)
                    {
                        LidStatusChanged(isLidOpen);
                    }

                    _previousLidState = isLidOpen;
                }
            }
        }

        private void LidStatusChanged(bool isLidOpen)
        {
            if (isLidOpen)
            {
                //Do some action on lid open event
                Debug.WriteLine("{0}: Lid opened!", DateTime.Now);
            }
            else
            {
                //Do some action on lid close event
                Debug.WriteLine("{0}: Lid closed!", DateTime.Now);
            }
        }
    }
}

当你合上盖子时，它是锁定屏幕。

Answer 5

电源管理

处理节能事件
到目前为止，重点是在应用程序运行时延长电池寿命。您还应该考虑一个额外的因素：计算机挂起操作时应用程序的行为方式。这里需要考虑两个关键场景：

• 当计算机空闲一段时间时，活动电源使用方案可能会指定硬件进入待机或休眠模式。
• 当用户执行使计算机进入挂起操作的操作时，例如合上笔记本电脑的盖子或按电源按钮。

我希望它能给你一些指导:)