Network Discovery

[Nicolas]

Basically I got a LAN with several computer.
From Computer A I'll got my appliation which should do the following:
Check if any other computer lost connection to the network. (Computer B may
has been shutdown, While computer C cable has been unplug, etc.).

I used to check if a file exist on each computer by running a loop. This way
is to slow and too much CPU demanding for nothing.

Is there anty other way like a listener of some sort to catch connection
lost from other computer into the network. (Eventually I may know the IP or
computer name that I want to check).

Thank you.

 

[Gillard]

use a timer

ub pingg(ByVal adress As String, ByVal timeout As Int32)
If My.Computer.Network.IsAvailable Then
Try
If My.Computer.Network.Ping(adress, timeout) Then
MsgBox(adress & vbCrLf & "ok", MsgBoxStyle.Information,
Me.Text)
Else
MsgBox(adress & vbCrLf & "failled",
MsgBoxStyle.Exclamation, Me.Text)
End If
Catch ex As Exception
MessageBox.Show(ex.Message, Me.Text, MessageBoxButtons.OK,
MessageBoxIcon.Error)
End Try
End If
End Sub

 

[Nicolas]

Is there any other way then a Timer since it's doing a loop which could run
for days.

 

[James Hahn]

This has already been done in several places, and you may be able to get
some ideas. See, for instance:
http://www.a1vbcode.com/app-4403.asp

You should also consider whether you can use the facilities of .Net, such as
the FileSystemWatcher class.

 

[Gillard]

use a loop with a process.sleep

Is there any other way then a Timer since it's doing a loop which could
run
for days.

 

[Gillard]

sorry
Threading.Thread.Sleep(1000)

use a loop with a process.sleep

 

[Cor Ligthert[MVP]]

Nicolas,

In my idea is for this Directory Services.

Be aware the the documentation around it is still fair.

http://msdn.microsoft.com/en-us/library/ms682458(VS.85).aspx

(As you use HDLC then you have no fixex IP addresses that you can ping)



Cor