c# 网络是否连接

c#  网络是否连接

方案一：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Runtime.InteropServices;//必须引用这个命名空间

namespace NetWorkConn_Demo
{
    class Program
    {
        [DllImport("wininet.dll")]
        private extern static bool InternetGetConnectedState(out int connectionDescription, int reservedValue);

        static void Main(string[] args)
        {
            int flag = 0;
            var isConn = InternetGetConnectedState(out flag, 0);
            if (isConn)
            {
                Console.WriteLine("网络已连接！");
            }
            else
            {
                Console.WriteLine("网络已断开！");
            }
            Console.ReadKey();
        }
    }
}

方案二：  【不好】

            Ping p = new Ping();
            PingReply reply = p.Send("192.168.0.0", 100);
            if (reply.Status == IPStatus.Success)
            {
                Console.WriteLine("网络已连接！");
            }
            else
            {
                Console.WriteLine("网络已断开！");
            }