Check Your Internet Connection With C#

This is a post i found when i was searching some c# code so as to chech the status of my dialup connection.

I have not tested it yet, but i ll do it.

Check Your Internet Connection With C#
By Simohamed Attahri

How to check if your computer is connected to the internet with C#. It's much more easier that other tutorials I've seen in other sites. In deed, we're going to use a simple API function InternetGetConnectedState, to return a boolean variable.

This function takes two arguments :

The first one is an integer used with out keyword, that means that after calling the function, the variable will contain an interger that describes the connection state ( use of a modem, use of a proxy, offline mode...). Note that you must refer to www.msdn.com for more information about that.
The second one is a reserved variable that must be set to 0.

In this tutorial, we'll create a class with a static function that returns true if connected and false if not, using our API function in private state.

Check this out :

using System ; using System.Runtime ; using System.Runtime.InteropServices ; public class InternetCS { //Creating the extern function... [DllImport("wininet.dll")] private extern static bool InternetGetConnectedState( int out Description, int ReservedValue ) ; //Creating a function that uses the API function... public static bool IsConnectedToInternet( ) { int Desc ; return InternetGetConnectedState( out Desc, 0 ) ; } }

Simohamed Attahri,
attahri_simohamed@hotmail.com for help.