1. You can use WMI (Win2K & XP):
(First, you must create a project in VS.NET, then reference a .NET accessory: System.Management.dll, so your project can use WMI)
With windows 2000 & xp, undocumented:
Msndis_MediaconnectStatus - NDISMEDIACONNECTSTATUS:
(0 = connected ?, 1 = not connection?)
With windows xp:
Win32_NetworkAdapter - NetConnectionStatus:
Using system.management;
Static void reportConnection2000 ()
{
ManagementClass Mc = New ManagementClass (@ "root / wmi", @ "msndis_mediaconnectstatus", null;
ManagementObjectCollection moc = mc.getinstances ();
Foreach (ManagementObject Mo in MoC)
{
String name = (string) Mo ["instancename"];
Bool Active = (BOOL) MO ["Active"];
Uint status = (uint) Mo ["NDISMEDIACONNECTSTATUS"];
Console.writeline ("{0} / n / Tactive: {1} Media Status: {2}", name, activ, status;
}
}
Static void reportConnectionXP ()
{
ManagementClass MC = New ManagementClass (@ "win32_networkadapter);
ManagementObjectCollection moc = mc.getinstances ();
Foreach (ManagementObject Mo in MoC)
{
String name = (string) Mo ["name"];
Object Val = Mo ["NetConnectionStatus"];
IF (Val! = null)
Console.writeline ("{0} / n / tconnection status: {1}", name, (ushib) VAL);
Else
Console.writeLine ("{0} / n", name);
}
}
If it returns 0, the connection is indicated;
If it is returned 1, it means no connection;
The above is a local connection state;
============================================================================================================================================================================================================= =========
Use PING to get: process p = new process ();
P.StartInfo .WorkingDirectory = "C: //";
p.Startinfo.fileName = "ping.exe";
P.StartInfo.arguments = "192.168.52.31";
P.Startinfo.uShellexecute = false;
P.Startinfo.RedirectStandardOrdoutput = True;
P.StartInfo.createnowindow = true;
p.Start ();
String Output = p.standardoutput.readtoend ();
p.WaitForexit ();
Messagebox.show (output); // Get the output value of ping
