Windows service: Get username when user log on

Question

my windows service should save the name of the user, which logon/logoff at the moment. The following code works for me but didn\'t save the username:

protected o         


        

Answer 1

Finally I got a solution. In the windows service method, there is the session id provided. So with this session id we can execute a powershell command 'quser' and get the current user, who login/logoff on the server. Seen here: How to get current windows username from windows service in multiuser environment using .NET

So this is the function, which we need to create:

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 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";
        } 

And this is the windows service function:

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);

                        //.....