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
}
}