¿Cómo recuperas una lista de usuarios conectados / conectados en .NET?

Aquí está el escenario:

Usted tiene un servidor de Windows al que los usuarios se conectan de forma remota a través de RDP. Desea que su progtwig (que se ejecuta como un servicio) sepa quién está conectado actualmente. Esto puede incluir o no una sesión de consola interactiva.

Tenga en cuenta que esto no es lo mismo que recuperar el usuario interactivo actual.

¿Supongo que hay algún tipo de acceso API a Terminal Services para obtener esta información?

Aquí está mi opinión sobre el problema:

using System; using System.Collections.Generic; using System.Text; using System.Runtime.InteropServices; namespace EnumerateRDUsers { class Program { [DllImport("wtsapi32.dll")] static extern IntPtr WTSOpenServer([MarshalAs(UnmanagedType.LPStr)] String pServerName); [DllImport("wtsapi32.dll")] static extern void WTSCloseServer(IntPtr hServer); [DllImport("wtsapi32.dll")] static extern Int32 WTSEnumerateSessions( IntPtr hServer, [MarshalAs(UnmanagedType.U4)] Int32 Reserved, [MarshalAs(UnmanagedType.U4)] Int32 Version, ref IntPtr ppSessionInfo, [MarshalAs(UnmanagedType.U4)] ref Int32 pCount); [DllImport("wtsapi32.dll")] static extern void WTSFreeMemory(IntPtr pMemory); [DllImport("Wtsapi32.dll")] static extern bool WTSQuerySessionInformation( System.IntPtr hServer, int sessionId, WTS_INFO_CLASS wtsInfoClass, out System.IntPtr ppBuffer, out uint pBytesReturned); [StructLayout(LayoutKind.Sequential)] private struct WTS_SESSION_INFO { public Int32 SessionID; [MarshalAs(UnmanagedType.LPStr)] public String pWinStationName; public WTS_CONNECTSTATE_CLASS State; } public enum WTS_INFO_CLASS { WTSInitialProgram, WTSApplicationName, WTSWorkingDirectory, WTSOEMId, WTSSessionId, WTSUserName, WTSWinStationName, WTSDomainName, WTSConnectState, WTSClientBuildNumber, WTSClientName, WTSClientDirectory, WTSClientProductId, WTSClientHardwareId, WTSClientAddress, WTSClientDisplay, WTSClientProtocolType } public enum WTS_CONNECTSTATE_CLASS { WTSActive, WTSConnected, WTSConnectQuery, WTSShadow, WTSDisconnected, WTSIdle, WTSListen, WTSReset, WTSDown, WTSInit } static void Main(string[] args) { ListUsers(Environment.MachineName); } public static IntPtr OpenServer(String Name) { IntPtr server = WTSOpenServer(Name); return server; } public static void CloseServer(IntPtr ServerHandle) { WTSCloseServer(ServerHandle); } public static void ListUsers(String ServerName) { IntPtr serverHandle = IntPtr.Zero; List resultList = new List(); serverHandle = OpenServer(ServerName); try { IntPtr SessionInfoPtr = IntPtr.Zero; IntPtr userPtr = IntPtr.Zero; IntPtr domainPtr = IntPtr.Zero; Int32 sessionCount = 0; Int32 retVal = WTSEnumerateSessions(serverHandle, 0, 1, ref SessionInfoPtr, ref sessionCount); Int32 dataSize = Marshal.SizeOf(typeof(WTS_SESSION_INFO)); IntPtr currentSession = SessionInfoPtr; uint bytes = 0; if (retVal != 0) { for (int i = 0; i < sessionCount; i++) { WTS_SESSION_INFO si = (WTS_SESSION_INFO)Marshal.PtrToStructure((System.IntPtr)currentSession, typeof(WTS_SESSION_INFO)); currentSession += dataSize; WTSQuerySessionInformation(serverHandle, si.SessionID, WTS_INFO_CLASS.WTSUserName, out userPtr, out bytes); WTSQuerySessionInformation(serverHandle, si.SessionID, WTS_INFO_CLASS.WTSDomainName, out domainPtr, out bytes); Console.WriteLine("Domain and User: " + Marshal.PtrToStringAnsi(domainPtr) + "\\" + Marshal.PtrToStringAnsi(userPtr)); WTSFreeMemory(userPtr); WTSFreeMemory(domainPtr); } WTSFreeMemory(SessionInfoPtr); } } finally { CloseServer(serverHandle); } } } } 

Otra opción, si no quieres tratar con el P / Invoca tú mismo, sería utilizar la biblioteca de Cassia :

 using System; using System.Security.Principal; using Cassia; namespace CassiaSample { public static class Program { public static void Main(string[] args) { ITerminalServicesManager manager = new TerminalServicesManager(); using (ITerminalServer server = manager.GetRemoteServer("your-server-name")) { server.Open(); foreach (ITerminalServicesSession session in server.GetSessions()) { NTAccount account = session.UserAccount; if (account != null) { Console.WriteLine(account); } } } } } } 

Ok, una solución a mi propia pregunta.

Puede usar WMI para recuperar una lista de procesos en ejecución. También puede ver a los propietarios de estos procesos. Si observas a los propietarios de “explorer.exe” (y eliminas los duplicados) deberías terminar con una lista de usuarios conectados.

 using System; using System.Collections.Generic; using System.Text; using System.Runtime.InteropServices; namespace TerminalServices { class TSManager { [DllImport("wtsapi32.dll")] static extern IntPtr WTSOpenServer([MarshalAs(UnmanagedType.LPStr)] String pServerName); [DllImport("wtsapi32.dll")] static extern void WTSCloseServer(IntPtr hServer); [DllImport("wtsapi32.dll")] static extern Int32 WTSEnumerateSessions( IntPtr hServer, [MarshalAs(UnmanagedType.U4)] Int32 Reserved, [MarshalAs(UnmanagedType.U4)] Int32 Version, ref IntPtr ppSessionInfo, [MarshalAs(UnmanagedType.U4)] ref Int32 pCount); [DllImport("wtsapi32.dll")] static extern void WTSFreeMemory(IntPtr pMemory); [StructLayout(LayoutKind.Sequential)] private struct WTS_SESSION_INFO { public Int32 SessionID; [MarshalAs(UnmanagedType.LPStr)] public String pWinStationName; public WTS_CONNECTSTATE_CLASS State; } public enum WTS_CONNECTSTATE_CLASS { WTSActive, WTSConnected, WTSConnectQuery, WTSShadow, WTSDisconnected, WTSIdle, WTSListen, WTSReset, WTSDown, WTSInit } public static IntPtr OpenServer(String Name) { IntPtr server = WTSOpenServer(Name); return server; } public static void CloseServer(IntPtr ServerHandle) { WTSCloseServer(ServerHandle); } public static List ListSessions(String ServerName) { IntPtr server = IntPtr.Zero; List ret = new List(); server = OpenServer(ServerName); try { IntPtr ppSessionInfo = IntPtr.Zero; Int32 count = 0; Int32 retval = WTSEnumerateSessions(server, 0, 1, ref ppSessionInfo, ref count); Int32 dataSize = Marshal.SizeOf(typeof(WTS_SESSION_INFO)); Int32 current = (int)ppSessionInfo; if (retval != 0) { for (int i = 0; i < count; i++) { WTS_SESSION_INFO si = (WTS_SESSION_INFO)Marshal.PtrToStructure((System.IntPtr)current, typeof(WTS_SESSION_INFO)); current += dataSize; ret.Add(si.SessionID + " " + si.State + " " + si.pWinStationName); } WTSFreeMemory(ppSessionInfo); } } finally { CloseServer(server); } return ret; } } }