1、using System;
using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Net.NetworkInformation;
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namespace 判断是否联网
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{ |
class Program
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{ |
static void Main(string[] args)
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{ |
Ping p = new Ping();
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PingReply pr; |
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pr = p.Send("119.75.218.45");//百度的IP |
if (pr.Status != IPStatus.Success)//如果连接不成功
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{ |
Console.WriteLine("未联网"); |
} |
else |
{ |
Console.WriteLine("已联网"); |
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} |
Console.Read(); |
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} |
} |
} |
2、
WebRequest myrequest = WebRequest.Create("http://www.baidu.com");
WebResponse myres = null;
try
{
myres = myrequest.GetResponse();
myres.Close();
MessageBox.Show("连上了");
}
catch (Exception)
{
MessageBox.Show("连不上了");
}
3、
public partial class Form1 : Form
{
//判断网络连接
[DllImport("wininet")]
private extern static bool InternetGetConnectedState(out int connectionDescription, int reservedValue);
///<summary>
/// 检测本机的网络连接
///</summary>
private void button1_Click(object sender, EventArgs e)
{
//判断是否联网
int i = 0;
if (InternetGetConnectedState(out i, 0))
{
//联网
MessageBox.Show("Thylx提醒您：你的计算机已连接到网络上！");
}
else
{
//断网
MessageBox.Show("Thylx提醒您：本地连接已断开！");
}
}
}