如何检测工作在C＃中的互联网连接？ [英] How to detect working internet connection in C#?

问题描述

我有一个C＃code通过FTP协议，基本上上传文件（使用的FtpWebRequest ）。我想，但是，首先确定是否有要上传的文件（因为，如果没有有试图，该软件应该只是睡了一段时间，并再次检查无点）之前的因特网连接

I have a C# code that basically uploads a file via FTP protocol (using FtpWebRequest). I'd like, however, to first determine whether there is a working internet connection before trying to upload the file (since, if there isn't there is no point in trying, the software should just sleep for a time and check again).

有没有一种简单的方法来做到这一点，或者我应该只是尝试上传的文件，并在情况下，它只是失败再试一次，假设网络连接跌？

Is there an easy way to do it or should I just try to upload the file and in case it failed just try again, assuming the network connection was down?

推荐答案

只需使用普通的功能

System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable()

如果连接了返回的虚假事实。

that return true of false if the connection is up.

<一个href=\"http://msdn.microsoft.com/en-us/library/system.net.networkinformation.networkinterface.getisnetworkavailable.aspx\">From MSDN：
的网络连接被认为是可用的，如果任何网络接口被标记为向上，而不是一个回环或隧道接口。的

请是不是所有的，可以被连接到本地网络和路由器未连接到互联网的实例。要真正知道你是否连接到互联网，尝试平类

Keep in mind connectivity is not all, you can be connected to a local network and the router is not connected to the Internet for instance. To really know if you are connected to the internet try the Ping class.

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