found out if a remote computer is on the intranet network ?

[Franck]

hello ,
I use the following method to find out if a remote computer in an
intranet is connected or not on the intranet network...

but the following is very long at least 10-11s per host

are there any other know methods

thank for your help
Franck

using System.Net;
public static void pinger(string hostname,ref bool found)
{
try
{
Dns.GetHostByName(hostname);
}
catch(System.Net.Sockets.SocketException )
{
found=false;
}
catch(System.Security.SecurityException )
{
found=true;
}
catch(Exception excep)
{
found=false;
}
found=true;
}

 

[Michael Höhne]

Hi Franck,

you may try the following to see if it is faster:

using System.Management;



string Ping(string address) {

ManagementObjectSearcher searcher =

new ManagementObjectSearcher("root\\CimV2", "Select * From
Win32_PingStatus where Address = '" + address + "'");

ManagementObjectCollection objects = searcher.Get();

if (objects != null) {

foreach (ManagementObject mo in objects) {

object statusCode = mo["StatusCode"];

if ((statusCode != null) && ((uint) statusCode == 0)) {

return (string) mo["ProtocolAddress"];

}

}

}

return null;

}


This method will either return the ip address of the host specified in the
address parameter (host name orip address) or null, if the ping did not
succeed.

Michael

 

[Franck]

Thanks for your
help but it is lasting the same....

Hi Franck,

you may try the following to see if it is faster:

using System.Management;



string Ping(string address) {

ManagementObjectSearcher searcher =

new ManagementObjectSearcher("root\\CimV2", "Select * From
Win32_PingStatus where Address = '" + address + "'");

ManagementObjectCollection objects = searcher.Get();

if (objects != null) {

foreach (ManagementObject mo in objects) {

object statusCode = mo["StatusCode"];

if ((statusCode != null) && ((uint) statusCode == 0)) {

return (string) mo["ProtocolAddress"];

}

}

}

return null;

}


This method will either return the ip address of the host specified in the
address parameter (host name orip address) or null, if the ping did not
succeed.

Michael

hello ,
I use the following method to find out if a remote computer in an intranet
is connected or not on the intranet network...

but the following is very long at least 10-11s per host

are there any other know methods

thank for your help
Franck

using System.Net;
public static void pinger(string hostname,ref bool found)
{
try
{
Dns.GetHostByName(hostname);
}
catch(System.Net.Sockets.SocketException )
{
found=false;
}
catch(System.Security.SecurityException )
{
found=true;
}
catch(Exception excep)
{
found=false;
}
found=true;
}