Frage

Hier ist das Szenario:

Sie haben einen Windows-Server, den Benutzer remote über RDP eine Verbindung zu. Sie mögen Ihr Programm (das als Dienst ausgeführt wird) wissen, wer zur Zeit verbunden ist. Dies kann oder kann nicht eine interaktive Konsole-Sitzung umfassen.

Bitte beachten Sie, dass dies die nicht die gleiche wie nur die aktuellen interaktiven Benutzer abgerufen werden.

Ich vermute, dass es irgendeine Art von API-Zugriff auf Terminaldienste ist es, diese Informationen zu bekommen?

War es hilfreich?

Lösung

Hier ist mein nehmen auf die Frage:

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<String> resultList = new List<string>();
      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);
      }

    }

  }
}

Andere Tipps

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<String> ListSessions(String ServerName)
    {
        IntPtr server = IntPtr.Zero;
        List<String> ret = new List<string>();
        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;
    }
    }
}
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