c# - .NET Core 2.x如何获取当前事件的本地网络IPv4地址？

Question

在其上运行 WebService。就像我可以在 cmd.exe > ipconfig 中得到的一样:

我想实现的是Kestrel的自动IP配置，比如:

.UseKestrel(opts => 
    { 
        opts.Listen(/*LocalIPv4ActiveAddress*/, 5000);
    }) 

因此我可以使用不同的事件网络接口(interface)(WiFi || 以太网)和不同的本地网络 IP 地址切换我的开发机器。

Answer 1

你可以尝试这样的事情:

// order interfaces by speed and filter out down and loopback
// take first of the remaining
var firstUpInterface = NetworkInterface.GetAllNetworkInterfaces()
    .OrderByDescending(c => c.Speed)
    .FirstOrDefault(c => c.NetworkInterfaceType != NetworkInterfaceType.Loopback && c.OperationalStatus == OperationalStatus.Up);
if (firstUpInterface != null) {
    var props = firstUpInterface.GetIPProperties();
    // get first IPV4 address assigned to this interface
    var firstIpV4Address = props.UnicastAddresses
        .Where(c => c.Address.AddressFamily == AddressFamily.InterNetwork)
        .Select(c => c.Address)
        .FirstOrDefault();
}