Detect Changes in Network Connectivity - CSharp Network

CSharp examples for Network:Network Interface

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Description

Detect Changes in Network Connectivity

Demo Code


using System;/*from ww  w .  j ava 2  s .com*/
using System.Net.NetworkInformation;

class MainClass
    {
        private static void NetworkAvailabilityChanged(object sender, NetworkAvailabilityEventArgs e)
        {
            if (e.IsAvailable)
            {
                Console.WriteLine("Network Available");
            }
            else
            {
                Console.WriteLine("Network Unavailable");
            }
        }
        private static void NetworkAddressChanged(object sender, EventArgs e)
        {
            Console.WriteLine("Current IP Addresses:");
            foreach (NetworkInterface ni in NetworkInterface.GetAllNetworkInterfaces())
            {
                foreach (UnicastIPAddressInformation addr in ni.GetIPProperties().UnicastAddresses)
                {
                    Console.WriteLine("    - {0} (lease expires {1})", addr.Address, DateTime.Now + new TimeSpan(0, 0, (int)addr.DhcpLeaseLifetime));
                }
            }
        }

        static void Main(string[] args)
        {
            NetworkChange.NetworkAvailabilityChanged += NetworkAvailabilityChanged;
            NetworkChange.NetworkAddressChanged += NetworkAddressChanged;
        }
    }

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