Solved

Any way to tell is somone is remoted into a computer using XP with .net 2.0?

Posted on 2009-07-07
7
462 Views
Last Modified: 2013-11-07
I'm working on a script that users would log into a terminal server.  From there they will see test workstations that are available for them to remote desktop to.  I need to know how to tell if there is a remote desktop connection available or if someone else is using it for these test workstations.  Any ideas how I can check for an active remote desktop session running on XP with .net 2.0?  Thanks, Chad
0
Comment
Question by:chadmanvb
  • 5
  • 2
7 Comments
 
LVL 4

Expert Comment

by:mysteriousguy
ID: 24800515
didn't try, but maybe WMI helps you (add a refernce to System.Management)
System.Management.ManagementScope ms = new System.Management.ManagementScope();
System.Management.ObjectQuery oq = new System.Management.ObjectQuery("Select * from Win32_LogonSession Where LogonType = 2 OR LogonType = 10");
System.Management.ManagementObjectSearcher oSearcher = new System.Management.ManagementObjectSearcher(ms, oq);
System.Management.ManagementObjectCollection oReturnCollection = oSearcher.Get();
 
foreach (System.Management.ManagementObject oReturn in oReturnCollection)
{
    Debug.WriteLine("Name : " + (oReturn["Name"] ?? "").ToString());
    Debug.WriteLine("StartTime: " + (oReturn["StartTime"] ?? "").ToString());
    Debug.WriteLine("Caption: " + (oReturn["Caption"] ?? "").ToString());
    Debug.WriteLine("LogonId: " + (oReturn["LogonId"] ?? "").ToString());
    Debug.WriteLine("LogonType: " + (oReturn["LogonType"] ?? "").ToString());
}

Open in new window

0
 
LVL 4

Accepted Solution

by:
mysteriousguy earned 500 total points
ID: 24801409
I just tried my solution. The complete code is attached
//create a local management scope
ManagementScope managementScope = new ManagementScope();
//create a query for all available sessions (LogonType 2 = Interactive; LogonType 10 = RemoteInteractive)
ObjectQuery sessionQuery = new ObjectQuery("Select * from Win32_LogonSession Where LogonType = 2 OR LogonType = 10");
// execute the query
ManagementObjectSearcher sessionObjectSearcher = new ManagementObjectSearcher(managementScope, sessionQuery);
ManagementObjectCollection sessionObjectCollection = sessionObjectSearcher.Get();
 
//iterate through all sessions
foreach (ManagementObject sessionObjectItem in sessionObjectCollection)
{
    //determine properties
    uint logonType = (uint)sessionObjectItem["LogonType"];
    string logonId = sessionObjectItem["LogonId"] as string ;
 
    if (logonType == 2)
    {
        Debug.WriteLine("Logon Type: Console");
    }
    else
    {
        Debug.WriteLine("Logon Type: RDP/Terminal Server");
    }
 
    //create a new query to get the user information for the selected session
    ObjectQuery associatorQuery = new ObjectQuery(string.Concat("Associators of {Win32_LogonSession.LogonId=", logonId, "} Where AssocClass=Win32_LoggedOnUser Role=Dependent"));
    // execute the query
    ManagementObjectSearcher associatorObjectSearcher = new ManagementObjectSearcher(managementScope, associatorQuery);
    ManagementObjectCollection associatorObjectCollection = associatorObjectSearcher.Get();
 
    //iterate through all users (should only be one result per session)
    foreach (ManagementObject associatorObjectItem in associatorObjectCollection)
    {
        //determine properties and output the result
        string user = associatorObjectItem["Name"] as string;
        string name = associatorObjectItem["FullName"] as string;
        string domain = associatorObjectItem["Domain"] as string;
        Debug.WriteLine(string.Concat("User: ", user));
        Debug.WriteLine(string.Concat("FullName: " , name));
        Debug.WriteLine(string.Concat("Domain: ", domain));
    }
 
    Debug.WriteLine(string.Concat("Session start time: ", sessionObjectItem["StartTime"]));
}

Open in new window

0
 

Author Comment

by:chadmanvb
ID: 24804847
Great!  I will give it a shot tomorrow at work.  Would you happen to know how to change this from c# to vb easily?  Thanks again, Chad
0
3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

 

Author Comment

by:chadmanvb
ID: 24814387
I just tried it, but I guess I am not sure how to get this working in VB.  I imported System.Management.  Any help would be great.  Chad
0
 

Author Comment

by:chadmanvb
ID: 24823580
Was anyone able to change this from C# to vb?  Thanks, Chad
0
 

Author Comment

by:chadmanvb
ID: 24826298
Ok, I have half of it working, but not sure why the other part is not working.  Below is what I have and the first part works great.

  Dim managementScope As New ManagementScope("\\" & TextBox1.Text & "\root\cimv2")
        Dim ojectQuery As New ObjectQuery("Select * from Win32_LogonSession Where LogonType = 2 OR LogonType = 10")
        Dim sessionObjectSearcher As New ManagementObjectSearcher(managementScope, ojectQuery)
        Dim sessionObjectCollection As ManagementObjectCollection = Nothing
        sessionObjectSearcher.Options.Timeout = New System.TimeSpan(0, 0, 5)
        sessionObjectSearcher.Options.ReturnImmediately = True

        sessionObjectCollection = sessionObjectSearcher.Get()


        Dim ManagementObject As ManagementObject
        Dim loginType As String = ""
        Dim strDomain As String = ""

        For Each ManagementObject In sessionObjectCollection

            loginType = ManagementObject("LogonType")
            If loginType = "2" Then
                loginType = "Console"
            Else
                loginType = "Remote Desktop"
            End If

            Exit For
        Next

        MessageBox.Show(loginType)

'*****************everything above here works!!!**********************************


        'create a new query to get the user information for the selected session
        'ObjectQuery associatorQuery = new ObjectQuery(string.Concat("Associators of {Win32_LogonSession.LogonId=", logonId, "} Where AssocClass=Win32_LoggedOnUser Role=Dependent"));
        Dim associatorQuery As New ObjectQuery(String.Concat("Associators of {Win32_LogonSession.LogonId=", logonId, "} Where AssocClass=Win32_LoggedOnUser Role=Dependent"))
'???????????????????????????????????????????????????
        'ObjectQuery(associatorQuery = New ObjectQuery(String.Concat("Associators of {Win32_LogonSession.LogonId=", logonId, "} Where AssocClass=Win32_LoggedOnUser Role=Dependent")))
        'execute the query
        Dim associatorObjectSearcher As ManagementObjectSearcher = New ManagementObjectSearcher(managementScope, associatorQuery)
        Dim associatorObjectCollection As ManagementObjectCollection = Nothing
        associatorObjectCollection = associatorObjectSearcher.Get()

        Dim user As String = ""
        Dim name As String = ""
        Dim domain As String = ""


        'iterate through all users (should only be one result per session)
        For Each ManagementObject In associatorObjectCollection

            'determine properties and output the result
            user = associatorObjectItem("Name")
            name = associatorObjectItem("FullName")
            domain = associatorObjectItem("Domain")
'?????????????????still have errors for these 3 items.

            Exit For

        Next
0
 

Author Closing Comment

by:chadmanvb
ID: 31600858
Works great, I will just try to do this in C#.  Been looking for an excuse to learn it.  Chad
0

Featured Post

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In my previous two articles we discussed Binary Serialization (http://www.experts-exchange.com/A_4362.html) and XML Serialization (http://www.experts-exchange.com/A_4425.html). In this article we will try to know more about SOAP (Simple Object Acces…
More often than not, we developers are confronted with a need: a need to make some kind of magic happen via code. Whether it is for a client, for the boss, or for our own personal projects, the need must be satisfied. Most of the time, the Framework…
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…

808 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question