Detecting a network connection

[Scott Leonard]

Hello -

I'm writing an application that will be used on "sometimes connected"
devices (laptops, tablets).

In C#, what is the best way to detect whether a network connection is
present? I'd rather not rely on a network request timing out - the detection
process must be very quick.

Thanks in advance,
Scott


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[Road Warrior]

Check the ispluggedin method of the networkconnecti on class.

"Scott Leonard" <no**@none.co m> wrote in message
news:3f******** **@127.0.0.1...

Hello -

I'm writing an application that will be used on "sometimes connected"
devices (laptops, tablets).

In C#, what is the best way to detect whether a network connection is
present? I'd rather not rely on a network request timing out - the detection process must be very quick.

Thanks in advance,
Scott


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[Christina Androne]

Scott Leonard wrote:

Hello -

I'm writing an application that will be used on "sometimes connected"
devices (laptops, tablets).

In C#, what is the best way to detect whether a network connection is
present? I'd rather not rely on a network request timing out - the
detection process must be very quick.

Try System.Windows. Forms.SystemInf ormation.Networ k. It is, of course,
true when a network connection is present.
HTH,

Christina Androne

[Juan Gabriel Del Cid]

> In C#, what is the best way to detect whether a network

connection is present?

Use WMI, like so:

using System;
using System.Manageme nt;
using System.Windows. Forms;

namespace Tests {
public class NetworkProbe {
public static void Main(string []args) {
ObjectQuery objectQuery = new ObjectQuery(
"select * from Win32_NetworkAd apter " +
"where NetConnectionSt atus=2"); // 2 means connected

ManagementObjec tSearcher searcher =
new ManagementObjec tSearcher(objec tQuery);

int connectedNetwor ks = searcher.Get(). Count;

if (connectedNetwo rks > 0) {
Console.WriteLi ne("There are {0} connected network interfaces",
connectedNetwor ks);
} else {
Console.WriteLi ne("There is no network connection present");
}
}
}
}

That should do it,
-JG