public async Task Run()
{
#if !DEBUG
if (WorkstationHelper.GetActiveSessionLockState() == WorkstationHelper.LockState.Unlocked)
{
try
{
SessionSwitchMonitor.SessionSwitch += SessionSwitchMonitor_SessionSwitch;
_wcfLocker.LockWorkstation();
await Task.WhenAny(_tcs.Task, Task.Delay(_lockTimeout));
}
finally
{
SessionSwitchMonitor.SessionSwitch -= SessionSwitchMonitor_SessionSwitch;
}
if (!_tcs.Task.IsCompleted &&
WorkstationHelper.GetActiveSessionLockState() == WorkstationHelper.LockState.Unlocked)
{
_wtsapiLocker.LockWorkstation();
}
}
#endif
}
public void LockWorkstation()
{
var lockState = WorkstationHelper.GetActiveSessionLockState();
if (lockState == WorkstationHelper.LockState.Unlocked)
{
IntPtr ppSessionInfo = IntPtr.Zero;
IntPtr userPtr = IntPtr.Zero;
IntPtr domainPtr = IntPtr.Zero;
Int32 count = 0;
Int32 retval = WTSEnumerateSessions(IntPtr.Zero, 0, 1, ref ppSessionInfo, ref count);
Int32 dataSize = Marshal.SizeOf(typeof(WTS_SESSION_INFO));
var currentSession = ppSessionInfo;
uint bytes = 0;
if (retval == 0)
{
return;
}
WriteLine("Query sessions");
for (int i = 0; i < count; i++)
{
WTS_SESSION_INFO si = (WTS_SESSION_INFO)Marshal.PtrToStructure((System.IntPtr)currentSession, typeof(WTS_SESSION_INFO));
currentSession += dataSize;
WTSQuerySessionInformation(IntPtr.Zero, si.SessionID, WTS_INFO_CLASS.WTSUserName, out userPtr, out bytes);
WTSQuerySessionInformation(IntPtr.Zero, si.SessionID, WTS_INFO_CLASS.WTSDomainName, out domainPtr, out bytes);
var domain = Marshal.PtrToStringAnsi(domainPtr);
var userName = Marshal.PtrToStringAnsi(userPtr);
var sessionFullName = domain + "\\" + userName;
WTSFreeMemory(userPtr);
WTSFreeMemory(domainPtr);
// Note: it might be a good idea to limit session disconnects only to those activated by triggered device
//if (sessionFullName == sessionTolock)
if (!string.IsNullOrWhiteSpace(domain) && !string.IsNullOrWhiteSpace(userName))
{
if (si.State == WTS_CONNECTSTATE_CLASS.WTSActive)
{
WriteLine($"Disconnecting session: {sessionFullName}");
bool disconnected = WTSDisconnectSession(IntPtr.Zero, si.SessionID, true);
WriteLine($"Session disconnected: {disconnected}");
}
else
{
WriteLine($"Session inactive: {sessionFullName}");
}
}
else
{
WriteLine($"Session skipped: {sessionFullName}");
}
}
WTSFreeMemory(ppSessionInfo);
}
}
void LockWorkstationAsync()
{
Task.Run(async() =>
{
var lockState = WorkstationHelper.GetActiveSessionLockState();
if (lockState == WorkstationHelper.LockState.Unlocked)
{
try
{
await _messenger.Publish(new LockWorkstationMessage());
}
catch (Exception ex)
{
WriteLine(ex);
}
}
});
}