How to detect the state of a network interface whether it is enabled?

Question

如何检测网络接口是否启用/禁用？

public Boolean IsNicEnabled(String nic) {  return true; }

Answer 1

You could take a look at System.Net.NetworkInformation.NetworkInterface class about this.

Querying interface status can be done using the NetworkInterface.GetIsNetworkAvailable() method call.

Example:

var adapters = NetworkInterface.GetAllNetworkInterfaces();
if (adapters != null && adapters.Length > 0)
{
    foreach (NetworkInterface adapter in adapters) 
    {
        Console.WriteLine("Network interface {0} is {1}", 
                      adapter.Name,
                      (NetworkInterface.GetIsNetworkAvailable()?"up":"down")
                      );
    }
}

The above code will yield results as:

Network interface Local Area Network is up

Network interface Loopback Pseudo-Interface 1 is up

Now you can encapsulate this into your property's getter for instance you just need to add filtering for the adapters name.