Internet Accessible?

[Michael Nemtsev]

Hello perspolis,

Google first
http://groups.google.com/groups/search?q=dotnet+check+internet, as well as
http://www.codeguru.com/Cpp/I-N/internet/generalinternet/article.php/c3437
sample

p> Hi all
p> How can I find that user is connected to internet or not?
p> thanks in advance
p>
---
WBR,
Michael Nemtsev :: blog: http://spaces.live.com/laflour

"At times one remains faithful to a cause only because its opponents do not
cease to be insipid." (c) Friedrich Nietzsche

 

[perspolis]

Hi all
How can I find that user is connected to internet or not?

thanks in advance

 

[Peter Thornqvist]

Is there an equivalent to InternetCheckConnection in .Net? If not, why not
interop it?

Here's another alternative:

using System.Net;

HttpWebRequest request =
(HttpWebRequest)WebRequest.Create(@"http://www.microsoft.com");


An exception indicates that the site isn't reachable thus probably there is
no internet connection (ms site could be down as well, but that is not as
probable).

 

[Guest]

This is the check for network connectivity (in .NET 2.0):

System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable();

This will tell you only if you are connected to something (network, dialup,
wireless etc), not whether the internet is contactable. The best bet is to
try and do what you want to do and handle any exceptions, or try and open
something like google for microsoft to check for connectivity.

HTH

Ciaran O'Donnell

 

[Guest]

You can also handle events with network availability at
System.Net.NetworkInformation.NetworkChange.NetworkAvailabilityChanged
and you can ping webserver to check for connectivity too.
System.Net.NetworkInformation.Ping

HTH

Ciaran O'Donnell