private void RefreshThread_DoWork(object sender, DoWorkEventArgs e)
{
WTSUniqueSessionIdList valid_session_ids = new WTSUniqueSessionIdList();
foreach (string server in this.WTSServerHostnames)
{
IntPtr hServer = IntPtr.Zero;
try
{
IntPtr SessionInfoPtr = IntPtr.Zero;
Int32 sessionCount = 0;
Int32 dataSize = Marshal.SizeOf(typeof(Jrfc.NativeMethods.WTS_SESSION_INFO));
hServer = Jrfc.NativeMethods.WTSOpenServer(server);
Int32 retVal = Jrfc.NativeMethods.WTSEnumerateSessions(hServer, 0, 1, ref SessionInfoPtr, ref sessionCount);
if (retVal != 0)
{
Int32 currentSession = (int)SessionInfoPtr;
for (int i = 0; i < sessionCount; i++)
{
Jrfc.NativeMethods.WTS_SESSION_INFO si = (Jrfc.NativeMethods.WTS_SESSION_INFO)Marshal.PtrToStructure((System.IntPtr)currentSession, typeof(Jrfc.NativeMethods.WTS_SESSION_INFO));
currentSession += dataSize;
Jrfc.Wts.WTSSession session = new Jrfc.Wts.WTSSession(hServer, server, si);
bool filter = false;
if (session.State == NativeMethods.WTS_CONNECTSTATE_CLASS.WTSListen)
{
filter = true;
}
else if (session.State == NativeMethods.WTS_CONNECTSTATE_CLASS.WTSDisconnected && string.IsNullOrWhiteSpace(session.Username))
{
filter = true;
}
if (!filter)
{
this.AddOrUpdate(session);
valid_session_ids.Add(new WTSUniqueSessionId(server, session.SessionId)); // keep a list of existing sessions
}
}
Jrfc.NativeMethods.WTSFreeMemory(SessionInfoPtr);
}
}
catch (System.Exception x)
{ Jrfc.Exception.HandleException(x); }
finally
{ if (hServer != IntPtr.Zero)
{
Jrfc.NativeMethods.WTSCloseServer(hServer);
}
}
}
DeleteAllSessionIdsNotInList(valid_session_ids); // delete (old) sessions that are in the currect session list,
// but were not in the existing sessions just retreived from the
// RDS server. Presumably any session not in the valid_session_ids
// list no longer exists.
this.m_RefreshThread.ReportProgress(100);
}
//public WTSSession(string _Hostname, Jrfc.WinApi.WTS_SESSION_INFO _si)
//{
// this.SessionId = _si.SessionId;
// this.WinStationname = Marshal.PtrToStringAnsi(this.WtsSessionInfo.pWinStationName);
// this.UniqueSessionId = new WTSUniqueSessionId(_Hostname, _si.SessionId);
// this.State = _si.State;
//}
public WTSSession(IntPtr _ServerHandle, string _Hostname, Jrfc.NativeMethods.WTS_SESSION_INFO _si)
{
this.SessionId = _si.SessionId;
this.State = _si.State;
this.WinStationName = (string)Marshal.PtrToStringAnsi(_si.pWinStationName);
this.UniqueSessionId = new WTSUniqueSessionId(_Hostname, _si.SessionId);
this.Username = (string)this.QuerySessionInformation(_ServerHandle, Jrfc.NativeMethods.WTS_INFO_CLASS.WTSUserName);
this.ClientHostname = (string)this.QuerySessionInformation(_ServerHandle, Jrfc.NativeMethods.WTS_INFO_CLASS.WTSClientName);
this.DomainName = (string)this.QuerySessionInformation(_ServerHandle, Jrfc.NativeMethods.WTS_INFO_CLASS.WTSDomainName);
this.WtsClientAddress = (Jrfc.NativeMethods.WTS_CLIENT_ADDRESS) this.QuerySessionInformation(_ServerHandle, Jrfc.NativeMethods.WTS_INFO_CLASS.WTSClientAddress);
}