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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).
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?
Just use the plain function
that return true of false if the connection is up.
From MSDN:
A network connection is considered to be available if any network interface is marked “up” and is not a loopback or tunnel interface.
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.