public static uint GetRDPSession()
{
var consoleSessionId = Kernel32.WTSGetActiveConsoleSessionId();
uint activeSessionId = 0;
IntPtr ppSessionInfo = IntPtr.Zero;
var count = 0;
var enumSessionResult = WTSAPI32.WTSEnumerateSessions(WTSAPI32.WTS_CURRENT_SERVER_HANDLE, 0, 1, ref ppSessionInfo, ref count);
var dataSize = Marshal.SizeOf(typeof(WTSAPI32.WTS_SESSION_INFO));
var current = ppSessionInfo;
if (enumSessionResult != 0)
{
for (int i = 0; i < count; i++)
{
WTSAPI32.WTS_SESSION_INFO sessionInfo = (WTSAPI32.WTS_SESSION_INFO)Marshal.PtrToStructure((System.IntPtr)current, typeof(WTSAPI32.WTS_SESSION_INFO));
current += dataSize;
if (sessionInfo.State == WTSAPI32.WTS_CONNECTSTATE_CLASS.WTSActive && sessionInfo.SessionID != consoleSessionId)
{
activeSessionId = sessionInfo.SessionID;
}
}
}
return(activeSessionId);
}
public static uint GetRDPSession()
{
IntPtr ppSessionInfo = IntPtr.Zero;
Int32 count = 0;
Int32 retval = WTSAPI32.WTSEnumerateSessions(WTSAPI32.WTS_CURRENT_SERVER_HANDLE, 0, 1, ref ppSessionInfo, ref count);
Int32 dataSize = Marshal.SizeOf(typeof(WTSAPI32.WTS_SESSION_INFO));
var sessList = new List <WTSAPI32.WTS_SESSION_INFO>();
Int64 current = (Int64)ppSessionInfo;
if (retval != 0)
{
for (int i = 0; i < count; i++)
{
WTSAPI32.WTS_SESSION_INFO sessInf = (WTSAPI32.WTS_SESSION_INFO)Marshal.PtrToStructure((System.IntPtr)current, typeof(WTSAPI32.WTS_SESSION_INFO));
current += dataSize;
sessList.Add(sessInf);
}
}
uint retVal = 0;
var rdpSession = sessList.Find(ses => ses.pWinStationName.ToLower().Contains("rdp") && ses.State == 0);
if (sessList.Exists(ses => ses.pWinStationName.ToLower().Contains("rdp") && ses.State == 0))
{
retVal = (uint)rdpSession.SessionID;
}
return(retVal);
}
public static string GetUsernameFromSessionId(uint sessionId)
{
var username = string.Empty;
if (WTSAPI32.WTSQuerySessionInformation(IntPtr.Zero, sessionId, WTSAPI32.WTS_INFO_CLASS.WTSUserName, out var buffer, out var strLen) && strLen > 1)
{
username = Marshal.PtrToStringAnsi(buffer);
WTSAPI32.WTSFreeMemory(buffer);
}
return(username);
}
public static List <WindowsSession> GetActiveSessions()
{
var sessions = new List <WindowsSession>();
var consoleSessionId = Kernel32.WTSGetActiveConsoleSessionId();
sessions.Add(new WindowsSession()
{
ID = consoleSessionId,
Type = SessionType.Console,
Name = "Console",
Username = GetUsernameFromSessionId(consoleSessionId)
});
IntPtr ppSessionInfo = IntPtr.Zero;
var count = 0;
var enumSessionResult = WTSAPI32.WTSEnumerateSessions(WTSAPI32.WTS_CURRENT_SERVER_HANDLE, 0, 1, ref ppSessionInfo, ref count);
var dataSize = Marshal.SizeOf(typeof(WTSAPI32.WTS_SESSION_INFO));
var current = ppSessionInfo;
if (enumSessionResult != 0)
{
for (int i = 0; i < count; i++)
{
WTSAPI32.WTS_SESSION_INFO sessionInfo = (WTSAPI32.WTS_SESSION_INFO)Marshal.PtrToStructure((System.IntPtr)current, typeof(WTSAPI32.WTS_SESSION_INFO));
current += dataSize;
if (sessionInfo.State == WTSAPI32.WTS_CONNECTSTATE_CLASS.WTSActive && sessionInfo.SessionID != consoleSessionId)
{
sessions.Add(new WindowsSession()
{
ID = sessionInfo.SessionID,
Name = sessionInfo.pWinStationName,
Type = SessionType.RDP,
Username = GetUsernameFromSessionId(sessionInfo.SessionID)
});
}
}
}
return(sessions);
}