Detect if Network and Internet Connection, the best way !!!

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Hi all mister,

Which is THE BEST WAY IN THE WORLD AROUND for:

1. detect Network

2. detect Internet Connection is working...
which is the best way in the world and good practice recommended by MVPs
Microsoft ?

Thanks in advanced..

code below...but which is the best code ???

NetworkInterface.GetIsNetworkAvailable()

private static int ERROR_SUCCESS = 0;
public static bool IsInternetConnected() {
long dwConnectionFlags = 0;
if (!InternetGetConnectedState(dwConnectionFlags, 0))
return false;

if(InternetAttemptConnect(0) != ERROR_SUCCESS)
return false;

return true;
}
[DllImport("wininet.dll", SetLastError=true)]
public static extern int InternetAttemptConnect(uint res);
[DllImport("wininet.dll", SetLastError=true)]
public static extern bool InternetGetConnectedState(long flags,long
reserved);

Correct translation below.

[DllImport("wininet.dll", SetLastError=true)] public static extern bool
InternetGetConnectedState(out int flags,int reserved);
I found code in C#,

HttpWebRequest req;
HttpWebResponse resp;
try
{
req = (HttpWebRequest)WebRequest.Create("http://www.google.com");
resp = (HttpWebResponse)req.GetResponse();

if(resp.StatusCode.ToString().Equals("OK"))
{
Console.WriteLine("its connected.");
}
else
{
Console.WriteLine("its not connected.");
}
}
catch(Exception exc)
{
Console.WriteLine("its not connected.");
}

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[Peter Duniho]

On Wed, 29 Oct 2008 05:27:01 -0700, Alhambra Eidos Desarrollo
<Al*********************@discussions.microsoft.com wrote:

Hi all mister,
Which is THE BEST WAY IN THE WORLD AROUND for:

1. detect Network

2. detect Internet Connection is working...

Try to communicate with the remote endpoint you're interested in.

Just because the computer locally says there's a network, that doesn't
mean there is one. Also, some computers are configured to only attach the
network when you try to use it.

The general rule for networking code when it comes to testing whether
something will work is: just try it, and check for errors. Because of the
way networks behave, it's almost never reliable to test in advance to see
whether a given operation will succeed. Also, almost all operations have
the chance of failure. So the only reliable thing to do is always handle
errors correctly, and don't bother checking in advance whether something
works. Just do it and handle the error if it happens.

Pete