getting a list of all active computers on a local network

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Hi all,
I need to get a list of all in-use (not all possible) computer names and their current logged on users on a local network.

I have tried the following code.

C#

PrincipalContext ctx = new  PrincipalContext(ContextType.Domain);
IPAddress[] ip = Dns.GetHostAddresses(ctx.ConnectedServer.Split('.').GetValue(0).ToString());

DirectoryEntry dirEn = new DirectoryEntry(String.Format("LDAP://" + ip[0] + " x.y.com","DC=x,DC=y, DC=com"));
DirectorySearcher dirSearcher = new DirectorySearcher(dirEn);
SearchResultCollection result;

dirSearcher.Filter="(&(ObjectClass=computer))";
result = dirSearcher.FindAll();

It returns list of all computers in my network but i want list of only logged on computers(I mean which computers that users are logging in and using them right now).

Posted 13-Jan-13 20:18pm

M_Mogharrabi

Updated 13-Jan-13 21:54pm

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*Suvabrata Roy* · Accepted Answer · 2013-01-13T21:40:00

Solution 1

Hi,

http://stackoverflow.com/questions/7828376/c-sharp-check-loged-users-on-network[^]

Posted 13-Jan-13 21:40pm

Suvabrata Roy

Comments

M_Mogharrabi 14-Jan-13 4:01am

Hi Suvabrata Roy, and thanks for your reply.I tested that code but it does not work with "winNT:" as the parameter of DirectoryEntry and i tried String.Format("LDAP://MY_SERVER_IP x.y.com","DC=x,DC=y, DC=com") instead.
Is it correct?

Suvabrata Roy 14-Jan-13 4:10am

I think its correct, for more reference visit : Link

M_Mogharrabi 14-Jan-13 4:21am

Thanks again,And the last question(but not the least),
I have found another sample of using cassia in "http://www.findbestopensource.com/product/cassia" but it is a little different:

ITerminalServicesManager manager = new TerminalServicesManager();
using (ITerminalServer server = manager.GetLocalServer())
{
server.Open();
foreach (ITerminalServicesSession session in server.GetSessions())
{
Console.WriteLine("Hi there, " + session.UserAccount + " on session " + session.SessionId);
Console.WriteLine("It looks like you logged on at " + session.LoginTime + " and are now " + session.ConnectionState);
}
}

Do you think which one is better?

Suvabrata Roy 14-Jan-13 4:46am

Both are quite same...

Your main performance is depending on how many session's are their, in both cases you are using Enumeration but in
1st case : you check first and then deliver
2nd case : you are extracting all then do what ever check you need.
but 2nd code is looking more appropriate and structured. :)

M_Mogharrabi 14-Jan-13 4:50am

Thanks a lot for your time...

Suvabrata Roy 14-Jan-13 4:54am

you most welcome...

getting a list of all active computers on a local network

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getting a list of all active computers on a local network

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