C# 以编程方式确定锁定工作站的持续时间？

如何用代码确定机器锁定的时间

C#之外的其他想法也很受欢迎

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为了简单和干净，我喜欢windows服务的想法（并接受了它），但不幸的是，我认为它在这种特殊情况下不适合我。我想在我的工作站上运行这个程序，而不是在家里（或者在家之外，我想），但由于国防部的原因，它被很难锁定。事实上，这也是我自己滚动的部分原因

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不管怎样，我会把它写下来，看看它是否有效。谢谢大家

下面是查找电脑是否锁定的100%工作代码

使用此选项之前，请使用命名空间

System.Runtime.InteropServices

[DllImport("user32", EntryPoint = "OpenDesktopA", CharSet = CharSet.Ansi,SetLastError = true, ExactSpelling = true)]
private static extern Int32 OpenDesktop(string lpszDesktop, Int32 dwFlags, bool fInherit, Int32 dwDesiredAccess);

[DllImport("user32", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern Int32 CloseDesktop(Int32 hDesktop);

[DllImport("user32", CharSet = CharSet.Ansi,SetLastError = true,ExactSpelling = true)]
private static extern Int32 SwitchDesktop(Int32 hDesktop);

public static bool IsWorkstationLocked()
{
    const int DESKTOP_SWITCHDESKTOP = 256;
    int hwnd = -1;
    int rtn = -1;

    hwnd = OpenDesktop("Default", 0, false, DESKTOP_SWITCHDESKTOP);

    if (hwnd != 0)
    {
        rtn = SwitchDesktop(hwnd);
        if (rtn == 0)
        {
            // Locked
            CloseDesktop(hwnd);
            return true;
        }
        else
        {
            // Not locked
            CloseDesktop(hwnd);
        }
    }
    else
    {
        // Error: "Could not access the desktop..."
    }

    return false;
}

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我将创建一个处理OnSessionChange事件的Windows服务（visual studio 2005项目类型），如下所示：

protected override void OnSessionChange(SessionChangeDescription changeDescription)
{
    if (changeDescription.Reason == SessionChangeReason.SessionLock)
    { 
        //I left my desk
    }
    else if (changeDescription.Reason == SessionChangeReason.SessionUnlock)
    { 
        //I returned to my desk
    }
}

---

此时记录活动的内容和方式取决于您，但Windows服务提供了对Windows事件（如启动、关闭、登录/退出）以及锁定和解锁事件的快速方便访问。

下面的解决方案使用Win32 API。锁定工作站时调用OnSessionLock，解锁工作站时调用OnSessionUnlock

[DllImport("wtsapi32.dll")]
private static extern bool WTSRegisterSessionNotification(IntPtr hWnd,
int dwFlags);

[DllImport("wtsapi32.dll")]
private static extern bool WTSUnRegisterSessionNotification(IntPtr
hWnd);

private const int NotifyForThisSession = 0; // This session only

private const int SessionChangeMessage = 0x02B1;
private const int SessionLockParam = 0x7;
private const int SessionUnlockParam = 0x8;

protected override void WndProc(ref Message m)
{
    // check for session change notifications
    if (m.Msg == SessionChangeMessage)
    {
        if (m.WParam.ToInt32() == SessionLockParam)
            OnSessionLock(); // Do something when locked
        else if (m.WParam.ToInt32() == SessionUnlockParam)
            OnSessionUnlock(); // Do something when unlocked
    }

    base.WndProc(ref m);
    return;
}

void OnSessionLock() 
{
    Debug.WriteLine("Locked...");
}

void OnSessionUnlock() 
{
    Debug.WriteLine("Unlocked...");
}

private void Form1Load(object sender, EventArgs e)
{
    WTSRegisterSessionNotification(this.Handle, NotifyForThisSession);
}

// and then when we are done, we should unregister for the notification
//  WTSUnRegisterSessionNotification(this.Handle);

---

我以前没有发现过这个，但从任何应用程序都可以连接SessionSwitchEventHandler。显然，您的应用程序需要运行，但前提是：

Microsoft.Win32.SystemEvents.SessionSwitch += new Microsoft.Win32.SessionSwitchEventHandler(SystemEvents_SessionSwitch);

void SystemEvents_SessionSwitch(object sender, Microsoft.Win32.SessionSwitchEventArgs e)
{
    if (e.Reason == SessionSwitchReason.SessionLock)
    { 
        //I left my desk
    }
    else if (e.Reason == SessionSwitchReason.SessionUnlock)
    { 
        //I returned to my desk
    }
}

---

我知道这是一个老问题，但我找到了一种方法来获取给定会话的锁定状态

我找到了答案，但它是C++的，所以我尽可能多地翻译了C来获得锁状态。 下面是：

static class SessionInfo {
    private const Int32 FALSE = 0;

    private static readonly IntPtr WTS_CURRENT_SERVER = IntPtr.Zero;

    private const Int32 WTS_SESSIONSTATE_LOCK = 0;
    private const Int32 WTS_SESSIONSTATE_UNLOCK = 1;

    private static bool _is_win7 = false;

    static SessionInfo() {
        var os_version = Environment.OSVersion;
        _is_win7 = (os_version.Platform == PlatformID.Win32NT && os_version.Version.Major == 6 && os_version.Version.Minor == 1);
    }

    [DllImport("wtsapi32.dll")]
    private static extern Int32 WTSQuerySessionInformation(
        IntPtr hServer,
        [MarshalAs(UnmanagedType.U4)] UInt32 SessionId,
        [MarshalAs(UnmanagedType.U4)] WTS_INFO_CLASS WTSInfoClass,
        out IntPtr ppBuffer,
        [MarshalAs(UnmanagedType.U4)] out UInt32 pBytesReturned
    );

    [DllImport("wtsapi32.dll")]
    private static extern void WTSFreeMemoryEx(
        WTS_TYPE_CLASS WTSTypeClass,
        IntPtr pMemory,
        UInt32 NumberOfEntries
    );

    private enum WTS_INFO_CLASS {
        WTSInitialProgram = 0,
        WTSApplicationName = 1,
        WTSWorkingDirectory = 2,
        WTSOEMId = 3,
        WTSSessionId = 4,
        WTSUserName = 5,
        WTSWinStationName = 6,
        WTSDomainName = 7,
        WTSConnectState = 8,
        WTSClientBuildNumber = 9,
        WTSClientName = 10,
        WTSClientDirectory = 11,
        WTSClientProductId = 12,
        WTSClientHardwareId = 13,
        WTSClientAddress = 14,
        WTSClientDisplay = 15,
        WTSClientProtocolType = 16,
        WTSIdleTime = 17,
        WTSLogonTime = 18,
        WTSIncomingBytes = 19,
        WTSOutgoingBytes = 20,
        WTSIncomingFrames = 21,
        WTSOutgoingFrames = 22,
        WTSClientInfo = 23,
        WTSSessionInfo = 24,
        WTSSessionInfoEx = 25,
        WTSConfigInfo = 26,
        WTSValidationInfo = 27,
        WTSSessionAddressV4 = 28,
        WTSIsRemoteSession = 29
    }

    private enum WTS_TYPE_CLASS {
        WTSTypeProcessInfoLevel0,
        WTSTypeProcessInfoLevel1,
        WTSTypeSessionInfoLevel1
    }

    public enum WTS_CONNECTSTATE_CLASS {
        WTSActive,
        WTSConnected,
        WTSConnectQuery,
        WTSShadow,
        WTSDisconnected,
        WTSIdle,
        WTSListen,
        WTSReset,
        WTSDown,
        WTSInit
    }

    public enum LockState {
        Unknown,
        Locked,
        Unlocked
    }

    [StructLayout(LayoutKind.Sequential)]
    private struct WTSINFOEX {
        public UInt32 Level;
        public UInt32 Reserved; /* I have observed the Data field is pushed down by 4 bytes so i have added this field as padding. */
        public WTSINFOEX_LEVEL Data;
    }

    [StructLayout(LayoutKind.Sequential)]
    private struct WTSINFOEX_LEVEL {
        public WTSINFOEX_LEVEL1 WTSInfoExLevel1;
    }

    [StructLayout(LayoutKind.Sequential)]
    private struct WTSINFOEX_LEVEL1 {
        public UInt32 SessionId;
        public WTS_CONNECTSTATE_CLASS SessionState;
        public Int32 SessionFlags;

        /* I can't figure out what the rest of the struct should look like but as i don't need anything past the SessionFlags i'm not going to. */

    }

    public static LockState GetSessionLockState(UInt32 session_id) {
        IntPtr ppBuffer;
        UInt32 pBytesReturned;

        Int32 result = WTSQuerySessionInformation(
            WTS_CURRENT_SERVER,
            session_id,
            WTS_INFO_CLASS.WTSSessionInfoEx,
            out ppBuffer,
            out pBytesReturned
        );

        if (result == FALSE)
            return LockState.Unknown;

        var session_info_ex = Marshal.PtrToStructure<WTSINFOEX>(ppBuffer);

        if (session_info_ex.Level != 1)
            return LockState.Unknown;

        var lock_state = session_info_ex.Data.WTSInfoExLevel1.SessionFlags;
        WTSFreeMemoryEx(WTS_TYPE_CLASS.WTSTypeSessionInfoLevel1, ppBuffer, pBytesReturned);

        if (_is_win7) {
            /* Ref: https://msdn.microsoft.com/en-us/library/windows/desktop/ee621019(v=vs.85).aspx
                * Windows Server 2008 R2 and Windows 7:  Due to a code defect, the usage of the WTS_SESSIONSTATE_LOCK
                * and WTS_SESSIONSTATE_UNLOCK flags is reversed. That is, WTS_SESSIONSTATE_LOCK indicates that the
                * session is unlocked, and WTS_SESSIONSTATE_UNLOCK indicates the session is locked.
                * */
            switch (lock_state) {
                case WTS_SESSIONSTATE_LOCK:
                    return LockState.Unlocked;

                case WTS_SESSIONSTATE_UNLOCK:
                    return LockState.Locked;

                default:
                    return LockState.Unknown;
            }
        }
        else {
            switch (lock_state) {
                case WTS_SESSIONSTATE_LOCK:
                    return LockState.Locked;

                case WTS_SESSIONSTATE_UNLOCK:
                    return LockState.Unlocked;

                default:
                    return LockState.Unknown;
            }
        }
    }
}

静态类SessionInfo{
private const Int32 FALSE=0；
私有静态只读IntPtr WTS_CURRENT_SERVER=IntPtr.Zero；
private const Int32 WTS_SESSIONSTATE_LOCK=0；
private const Int32 WTS_SESSIONSTATE_UNLOCK=1；
私有静态bool_为_win7=false；
静态SessionInfo（）{
var os_version=Environment.OSVersion；
_is_win7=（os_version.PlatformID.Win32NT&&os_version.version.Major==6&&os_version.version.Minor==1）；
}
[DllImport（“wtsapi32.dll”）]
私有静态外部Int32 WTSQuerySessionInformation(
IntPtr服务器，
[Marshallas（UnmanagedType.U4）]UInt32会话ID，
[Marshallas（UnmanagedType.U4）]WTS\u INFO\u类WTSInfoClass，
输出IntPtr ppBuffer，
[Marshallas（UnmanagedType.U4）]输出UInt32字节返回
);
[DllImport（“wtsapi32.dll”）]
私有静态外部无效WTSFreeMemoryEx(
水处理系统类型水处理系统等级水处理系统等级，
IntPtr存储器，
UInt32条目数
);
私有枚举WTS_信息_类{
WTSInitialProgram=0，
WTSApplicationName=1，
WTSWorkingDirectory=2，
WTSOEMId=3，
WTSSessionId=4，
WTSUserName=5，
WTSWinStationName=6，
WTSDomainName=7，
WTSConnectState=8，
WTSClientBuildNumber=9，
WTSClientName=10，
WTSClientDirectory=11，
WTSClientProductId=12，
WTSClientHardwareId=13，
WTSClientAddress=14，
WTSClientDisplay=15，
WTSClientProtocolType=16，
WTSIdleTime=17，
WTSLogonTime=18，
WTSIncomingBytes=19，
WTSOutgoingBytes=20，
WTSIncomingFrames=21，
WTSOutgoingFrames=22，
WTSClientInfo=23，
WTSSessionInfo=24，
WTSSessionInfoEx=25，
WTSConfigInfo=26，
WTSValidationInfo=27，
WTSSessionAddressV4=28，
WTSIsRemoteSession=29
}
私有枚举WTS_类型_类{
WTSTypeProcessInfoLevel0，
WTSTypeProcessInfoLevel1，
WTSTypeSessionInfoLevel1
}
公共枚举WTS_连接状态_类{
是的，
WTS连接，
WTSConnectQuery，
WTSShadow，
WTS断开连接，
西德尔，
WTSListen，
WTSReset，
WTSDown，
WTSInit
}
公共枚举锁状态{
不详，
锁定，
解锁
}
[StructLayout（LayoutKind.Sequential）]
私有结构WTSINFOEX{
公共UInt32级；
public UInt32 Reserved；/*我观察到数据字段向下压了4个字节，所以我添加了这个字段作为填充*/
公共WTSINFOEX_级数据；
}
[StructLayout（LayoutKind.Sequential）]
私有结构WTSINFOEX_级别{
公共水处理厂1级水处理厂1级水处理厂；
}
[StructLayout（LayoutKind.Sequential）]
私有结构WTSINFOEX_LEVEL1{
公共UInt32会话ID；
公共WTS_CONNECTSTATE_类会话状态；
公共Int32会话标志；
/*我不知道结构的其余部分应该是什么样子，但由于我不需要任何超过SessionFlags的内容，所以我不打算这样做*/
}
公共静态锁状态GetSessionLockState（UInt32会话id）{
IntPtr-ppBuffer；
UInt32字节返回；
Int32结果=WTSQuerySessionInformation(
WTS_当前_服务器，
会话id，
WTS_INFO_CLASS.WTSSessionInfoEx，
在缓冲区外，
外字节返回
);
如果（结果==FALSE）
返回锁定状态。未知；
var session_info_ex=Marshal.PtrToStructure（ppBuffer）；
如果（会话信息前级！=1）
返回锁定状态。未知；
var lock_state=session_info_ex.Data.WTSInfoExLevel1.SessionFlags；
WTSFreeMemoryEx（WTS_TYPE_CLASS.WTSTypeSessionInfoLevel1，ppBuffer，PBytes返回）；
如果（_是_win7）{
/*参考：https://msdn.microsoft.com/en-us/library/windows/desktop/ee621019（v=vs.85）.aspx
*Windows Server 2008 R2和Windows 7:由于代码缺陷，WTS_会话状态_锁的使用
*WTS_SESSIONSTATE_UNLOCK标志被反转。也就是说，WTS_SESSIONSTATE_LOCK表示
CanHandleSessionChangeEvent = true;

public interface IMyServiceContract
{
    void Start();

    void Stop();

    void SessionChanged(Topshelf.SessionChangedArguments args);
}



public class MyService : IMyServiceContract
{

    public void Start()
    {
    }

    public void Stop()
    {

    }

    public void SessionChanged(SessionChangedArguments e)
    {
        Console.WriteLine(e.ReasonCode);
    }   
}

            IMyServiceContract myServiceObject = new MyService(); /* container.Resolve<IMyServiceContract>(); */


            HostFactory.Run(x =>
            {
                x.Service<IMyServiceContract>(s =>
                {
                    s.ConstructUsing(name => myServiceObject);
                    s.WhenStarted(sw => sw.Start());
                    s.WhenStopped(sw => sw.Stop());
                    s.WhenSessionChanged((csm, hc, chg) => csm.SessionChanged(chg)); /* THIS IS MAGIC LINE */
                });

                x.EnableSessionChanged(); /* THIS IS MAGIC LINE */

                /* use command line variables for the below commented out properties */
                /*
                x.RunAsLocalService();
                x.SetDescription("My Description");
                x.SetDisplayName("My Display Name");
                x.SetServiceName("My Service Name");
                x.SetInstanceName("My Instance");
                */

                x.StartManually(); // Start the service manually.  This allows the identity to be tweaked before the service actually starts

                /* the below map to the "Recover" tab on the properties of the Windows Service in Control Panel */
                x.EnableServiceRecovery(r =>
                {
                    r.OnCrashOnly();
                    r.RestartService(1); ////first
                    r.RestartService(1); ////second
                    r.RestartService(1); ////subsequents
                    r.SetResetPeriod(0);
                });

                x.DependsOnEventLog(); // Windows Event Log
                x.UseLog4Net();

                x.EnableShutdown();

                x.OnException(ex =>
                {
                    /* Log the exception */
                    /* not seen, I have a log4net logger here */
                });
            });                 

  <package id="log4net" version="2.0.5" targetFramework="net45" />
  <package id="Topshelf" version="4.0.3" targetFramework="net461" />
  <package id="Topshelf.Log4Net" version="4.0.3" targetFramework="net461" />