互联网连接检查 [英] Internet Connection Check

问题描述

亲爱的所有人，
我想开发一个可以在按下按钮的同时检查PC中可用互联网连接的应用程序.

请尽快帮助我.


问候，
Shawon Mahmud博士

Dear all,
I want to develop an application that check internet connection available in PC while pressing a button.

Please help me soon.


Regards,
Md. Shawon Mahmud

推荐答案

您好:

简单方法:

Hello:

Easy way:

try
 {
    System.Net.IPHostEntry iPHostEntry = System.Net.Dns.GetHostEntry("www.codeproject.com");
 }
 catch
 {
    Console.WriteLine("No connection...");
 }

推荐方式:

http://msdn.microsoft.com/en-us/library/aa384702% 28VS.85％29.aspx [ ^ ]

Recommended way:

http://msdn.microsoft.com/en-us/library/aa384702%28VS.85%29.aspx[^]

尝试一下

using System.Net.NetworkInformation;
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {

        }
        private void button1_Click(object sender, EventArgs e)
        {
            NetworkChange.NetworkAvailabilityChanged += new NetworkAvailabilityChangedEventHandler(NetworkChange_NetworkAvailabilityChanged);
        }
        public void NetworkChange_NetworkAvailabilityChanged(Object sender, NetworkAvailabilityEventArgs e)
        {
            if (e.IsAvailable)
                MessageBox.Show("Connected");
            else
                MessageBox.Show("Disconnected");
        }
    }
}

来自msdn:

http://msdn.microsoft.com/zh-cn/library/aa384702%28VS.85%29.aspx

from msdn :

http://msdn.microsoft.com/en-us/library/aa384702%28VS.85%29.aspx

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