C#中是否有简单的代码来检查PC是否已连接到互联网? [英] is there a simple code in C# to check if pc is connected to internet?

问题描述

至少，该代码还可以识别它是否已连接和不再连接，请提供帮助，因为我希望我将其放入我的项目中，但我真的不知道该怎么做.在此先感谢=)

atleast the code could also identify if it is connected and not connected anymore pleasee help because i want i to put into my project i have really no idea how to do it. thanks in advance =)

推荐答案

如何:

How about:Get the Available Network Connections Using WMI[^]

Best regards
Espen Harlinn

使用 InternetGetConnectedState [^ ] 功能.然后使用 InternetCheckConnection [

Use InternetGetConnectedState[^] function. And then use InternetCheckConnection[^] function. A sample code:

using System; 
using System.Runtime; 
using System.Runtime.InteropServices;  
public class InternetCS 
{       
  [DllImport("wininet.dll")]     
  private extern static bool InternetGetConnectedState( out int Description, int ReservedValue );
  public static bool IsConnectedToInternet( )     
  {         
    int Desc ;         
    return InternetGetConnectedState( out Desc, 0 ) ;     
  } 
} 

-OR-

-OR-

WebClient web = new WebClient();  
try 

{  
  web.DownloadData("http://www.codeproject.com");  
}  
catch (WebException ex)  
{  
  Console.WriteLine("Could not connect");  
} 

如果失败，则没有连接.但是我认为第一种方法更可靠.

祝你好运，
OI

If it fails you do not have conenction. But 1 st way is more reliable in my opinion.

Good luck,
OI

检查此提示/技巧
测试Internet连接 [

Check this Tip/Trick
Testing Internet Connectivity[^](Contains 5 different ways)

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