C#！！中判断！！网！！络连！！接的！！状态

来源：互联网发布：淘宝订单号查询在哪里编辑：程序博客网时间：2024/05/19 02:17

有时我们要不停的判断网络的连接状态，比如服务器网络连接是否正常等，下面就简单介绍我的判断方法，各位有更好的方法欢迎分享。

代码就不解释了，一看就明白了。

运行效果：

代码：

using System;using System.Collections.Generic;using System.Text;using System.Net.NetworkInformation;namespace ConsoleApplication1{    class Program    {        public static void Main(string[] args)        {            string url = "www.baidu.com;www.sina.com;www.cnblogs.com;www.google.com;www.163.com;www.csdn.com";            string[] urls = url.Split(new char[] { ';' });            CheckServeStatus(urls);            Console.ReadKey();        }                /// <summary>        /// 检测网络连接状态        /// </summary>        /// <param name="urls"></param>        public static void CheckServeStatus(string[] urls)        {            int errCount = 0;//ping时连接失败个数            if (!LocalConnectionStatus())            {                Console.WriteLine("网络异常~无连接");            }            else if (!MyPing(urls, out errCount))            {                if ((double)errCount / urls.Length >= 0.3)                {                    Console.WriteLine("网络异常~连接多次无响应");                }                else                {                    Console.WriteLine("网络不稳定");                }            }            else            {                Console.WriteLine("网络正常");            }        }        #region 网络检测         private const int INTERNET_CONNECTION_MODEM = 1;        private const int INTERNET_CONNECTION_LAN = 2;        [System.Runtime.InteropServices.DllImport("winInet.dll")]        private static extern bool InternetGetConnectedState(ref int dwFlag, int dwReserved);        /// <summary>        /// 判断本地的连接状态         /// </summary>        /// <returns></returns>        private static bool LocalConnectionStatus()        {            System.Int32 dwFlag = new Int32();            if (!InternetGetConnectedState(ref dwFlag, 0))            {                Console.WriteLine("LocalConnectionStatus--未连网!");                return false;            }            else            {                if ((dwFlag & INTERNET_CONNECTION_MODEM) != 0)                {                    Console.WriteLine("LocalConnectionStatus--采用调制解调器上网。");                    return true;                }                else if ((dwFlag & INTERNET_CONNECTION_LAN) != 0)                {                    Console.WriteLine("LocalConnectionStatus--采用网卡上网。");                    return true;                }            }            return false;        }        /// <summary>        /// Ping命令检测网络是否畅通        /// </summary>        /// <param name="urls">URL数据</param>        /// <param name="errorCount">ping时连接失败个数</param>        /// <returns></returns>        public static bool MyPing(string[] urls, out int errorCount)        {            bool isconn = true;            Ping ping = new Ping();            errorCount = 0;            try            {                PingReply pr;                for (int i = 0; i < urls.Length; i++)                {                    pr = ping.Send(urls[i]);                    if (pr.Status != IPStatus.Success)                    {                        isconn = false;                        errorCount++;                    }                    Console.WriteLine("Ping " + urls[i] + "    " + pr.Status.ToString());                }            }            catch            {                isconn = false;                errorCount = urls.Length;            }            //if (errorCount > 0 && errorCount < 3)            //  isconn = true;            return isconn;        }        #endregion    }}

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