Question

我的Windows服务应保存用户名，此时登录/注销。以下代码适用于我，但未保存用户名：

protected override void OnSessionChange(SessionChangeDescription changeDescription)
    {
        try
        {
            string user = "";

            foreach (ManagementObject currentObject in _wmiComputerSystem.GetInstances())
            {
                user += currentObject.Properties["UserName"].Value.ToString().Trim();
            }

            switch (changeDescription.Reason)
            {
                case SessionChangeReason.SessionLogon:
                    WriteLog(Constants.LogType.CONTINUE, "Logon - Program continues: " + user);
                    OnContinue();
                    break;
                case SessionChangeReason.SessionLogoff:
                    WriteLog(Constants.LogType.PAUSE, "Logoff - Program is paused: " + user);
                    OnPause();
                    break;
            }
            base.OnSessionChange(changeDescription);
        }
        catch (Exception exp)
        {
            WriteLog(Constants.LogType.ERROR, "Error");
        }
    }

修改 foreach循环给出了一个错误：

消息：访问被拒绝。（HRESULT的例外情况：0x80070005 （E_ACCESSDENIED））类型：System.UnauthorizedAccessException

但在我看来，此代码不是解决方案，因为它会保存所有登录到服务器的用户。

Answer 1

我在构建Windows服务时遇到了类似的问题。就像你一样，我有会话ID，需要获得相应的用户名。经过几次不成功的解决方案，我遇到了this particular answer，这激发了我的解决方案：

这是我的代码（所有代码都驻留在一个类中;在我的例子中，类继承了ServiceBase）。

    [DllImport("Wtsapi32.dll")]
    private static extern bool WTSQuerySessionInformation(IntPtr hServer, int sessionId, WtsInfoClass wtsInfoClass, out IntPtr ppBuffer, out int pBytesReturned);
    [DllImport("Wtsapi32.dll")]
    private static extern void WTSFreeMemory(IntPtr pointer);

    private enum WtsInfoClass
    {
        WTSUserName = 5, 
        WTSDomainName = 7,
    }

    private static string GetUsername(int sessionId, bool prependDomain = true)
    {
        IntPtr buffer;
        int strLen;
        string username = "SYSTEM";
        if (WTSQuerySessionInformation(IntPtr.Zero, sessionId, WtsInfoClass.WTSUserName, out buffer, out strLen) && strLen > 1)
        {
            username = Marshal.PtrToStringAnsi(buffer);
            WTSFreeMemory(buffer);
            if (prependDomain)
            {
                if (WTSQuerySessionInformation(IntPtr.Zero, sessionId, WtsInfoClass.WTSDomainName, out buffer, out strLen) && strLen > 1)
                {
                    username = Marshal.PtrToStringAnsi(buffer) + "\\" + username;
                    WTSFreeMemory(buffer);
                }
            }
        }
        return username;
    }

使用您班上的上述代码，您只需通过调用

来覆盖您重写的方法中的用户名

string username = GetUsername(changeDescription.SessionId);

Answer 2

你可以尝试：

System.Security.Principal.WindowsIdentity.GetCurrent();

另一个选项，请参阅：Getting logged-on username from a service

Answer 3

最后我得到了一个解决方案。在Windows服务方法中，提供了会话ID。因此，使用此会话ID，我们可以执行powershell命令'quser'并获取当前用户，该用户在服务器上登录/注销。见到这里：How to get current windows username from windows service in multiuser environment using .NET

所以这是我们需要创建的函数：

private string GetUsername(int sessionID)
        {
            try
            {
                Runspace runspace = RunspaceFactory.CreateRunspace();
                runspace.Open();

                Pipeline pipeline = runspace.CreatePipeline();
                pipeline.Commands.AddScript("Quser");
                pipeline.Commands.Add("Out-String");

                Collection<PSObject> results = pipeline.Invoke();

                runspace.Close();

                StringBuilder stringBuilder = new StringBuilder();
                foreach (PSObject obj in results)
                {
                    stringBuilder.AppendLine(obj.ToString());
                }

                foreach (string User in stringBuilder.ToString().Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries).Skip(1))
                {
                    string[] UserAttributes = User.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);

                    if (UserAttributes.Length == 6)
                    {
                        if (int.Parse(UserAttributes[1].Trim()) == sessionID)
                        {
                            return UserAttributes[0].Replace(">", string.Empty).Trim();
                        }
                    }
                    else
                    {
                        if (int.Parse(UserAttributes[2].Trim()) == sessionID)
                        {
                            return UserAttributes[0].Replace(">", string.Empty).Trim();
                        }
                    }
                }

            }
            catch (Exception exp)
            {
                // Error handling
            }

            return "Undefined";
        }

这是Windows服务功能：

protected override void OnSessionChange(SessionChangeDescription changeDescription)
        {
            try
            {
                switch (changeDescription.Reason)
                {
                    case SessionChangeReason.SessionLogon:
                        string user = GetUsername(changeDescription.SessionId);

                        WriteLog("Logon - Program continue" + Environment.NewLine + 
                            "User: " + user + Environment.NewLine + "Sessionid: " + changeDescription.SessionId);

                        //.....

Windows服务：用户登录时获取用户名

3 个答案: