WTS_INFO_CLASS WTS应用程序名称返回空字符串

Question

我在Windows Server 2016上有一个简单的登录脚本，该脚本在客户端连接时将数据写入db。

在此服务器上，我已经发布了一个应用程序，比如说Microsoft Paint。

客户端在控制面板->远程应用程序和桌面连接中建立连接后，便可以远程使用此应用程序。 远程应用程序（在我们的情况下为Microsoft Paint）然后显示在开始菜单中。 如果打开它，则将建立正常的远程桌面连接，并且Microsoft Paint会远程打开。

现在我想要的是获取应用程序的名称，客户端的名称，打开应用程序的时间和关闭应用程序的时间，然后将所有内容写入数据库。

wtsapi32应该提供检索应用程序名称所需的功能。在WTS_INFO_CLASS中有一个属性WTSApplicationName。

不幸的是，它总是返回一个空字符串。 其他属性（例如WTSClientAdress）返回预期结果。

还有其他检索应用名称的方法吗？

任何帮助将不胜感激！ 预先感谢。

public static List<SessionInfo> GetServerActiveSessions(string serverName)
        {
            IntPtr server = IntPtr.Zero;
            List<SessionInfo> sessionInfos = new List<SessionInfo>();
            server = OpenServer(serverName);
            if (server != IntPtr.Zero)
            {
                try
                {
                    IntPtr ppSessionInfo = IntPtr.Zero;
                    Int32 count = 0;
                    if (WTSEnumerateSessions(server, 0, 1, ref ppSessionInfo, ref count))
                    {
                        Int32 dataSize = Marshal.SizeOf(typeof(WTS_SESSION_INFO));
                        Int32 current = (int)ppSessionInfo;
                        for (int i = 0; i < count; i++)
                        {

                            SessionInfo sessionInfo = new SessionInfo();
                            WTS_SESSION_INFO si = (WTS_SESSION_INFO)Marshal.PtrToStructure((System.IntPtr)current, typeof(WTS_SESSION_INFO));
                            current += dataSize;
                            sessionInfo.ApplicationName = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSApplicationName);
                            sessionInfo.ClientAddress = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSClientAddress);
                            sessionInfo.ClientBuildNumber = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSClientBuildNumber);
                            sessionInfo.ClientDirectory = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSClientDirectory);
                            sessionInfo.ClientDisplay = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSClientDisplay);
                            sessionInfo.ClientDirectory = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSClientDirectory);
                            sessionInfo.ClientHardwareId = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSClientHardwareId);
                            sessionInfo.ClientName = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSClientName);
                            sessionInfo.ClientProductId = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSClientProductId);
                            sessionInfo.ClientProtocolType = getProtocolType(QuerySessionInfo<short>(server, si.SessionID, WTS_INFO_CLASS.WTSClientProtocolType));
                            sessionInfo.ConnectState = QuerySessionInfo<WTS_CONNECTSTATE_CLASS>(server, si.SessionID, WTS_INFO_CLASS.WTSConnectState);
                            sessionInfo.DomainName = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSDomainName);
                            sessionInfo.InitialProgram = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSInitialProgram);
                            sessionInfo.OEMId = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSOEMId);
                            sessionInfo.SessionId = si.SessionID;
                            sessionInfo.UserName = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSUserName);
                            sessionInfo.WinStationName = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSWinStationName);
                            sessionInfo.WorkingDirectory = QuerySessionInfo(server, si.SessionID, WTS_INFO_CLASS.WTSWorkingDirectory);
                            sessionInfos.Add(sessionInfo);
                        }
                        WTSFreeMemory(ppSessionInfo);
                    }
                }
                finally
                {
                    CloseServer(server);
                }
            }
            return sessionInfos;
        }