我正在运行一个服务器，我想显示我自己的IP地址。
获取计算机自身(如果可能的话，外部)IP地址的语法是什么?
有人编写了以下代码。
IPHostEntry host;
string localIP = "?";
host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
if (ip.AddressFamily.ToString() == "InterNetwork")
{
localIP = ip.ToString();
}
}
return localIP;
然而，我通常不信任作者，我不理解这段代码。有更好的方法吗?
当前回答
这个问题没有说ASP。NET MVC，但我还是把这个留在这里:
Request.UserHostAddress
其他回答
如果你想避免使用DNS:
List<IPAddress> ipList = new List<IPAddress>();
foreach (var netInterface in NetworkInterface.GetAllNetworkInterfaces())
{
foreach (var address in netInterface.GetIPProperties().UnicastAddresses)
{
if (address.Address.AddressFamily == AddressFamily.InterNetwork)
{
Console.WriteLine("found IP " + address.Address.ToString());
ipList.Add(address.Address);
}
}
}
使用LINQ获取所有IP地址为字符串:
using System.Linq;
using System.Net.NetworkInformation;
using System.Net.Sockets;
...
string[] allIpAddresses = NetworkInterface.GetAllNetworkInterfaces()
.SelectMany(c=>c.GetIPProperties().UnicastAddresses
.Where(d=>d.Address.AddressFamily == AddressFamily.InterNetwork)
.Select(d=>d.Address.ToString())
).ToArray();
为了过滤掉私人信息…
首先，定义一个扩展方法IsPrivate():
public static class IPAddressExtensions
{
// Collection of private CIDRs (IpAddress/Mask)
private static Tuple<int, int>[] _privateCidrs = new []{"10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16"}
.Select(c=>Tuple.Create(BitConverter.ToInt32(IPAddress
.Parse(c.Split('/')[0]).GetAddressBytes(), 0)
, IPAddress.HostToNetworkOrder(-1 << (32-int.Parse(c.Split('/')[1])))))
.ToArray();
public static bool IsPrivate(this IPAddress ipAddress)
{
int ip = BitConverter.ToInt32(ipAddress.GetAddressBytes(), 0);
return _privateCidrs.Any(cidr=>(ip & cidr.Item2)==(cidr.Item1 & cidr.Item2));
}
}
．.． 然后用它来过滤私人ip:
string[] publicIpAddresses = NetworkInterface.GetAllNetworkInterfaces()
.SelectMany(c=>c.GetIPProperties().UnicastAddresses
.Where(d=>d.Address.AddressFamily == AddressFamily.InterNetwork
&& !d.Address.IsPrivate() // Filter out private ones
)
.Select(d=>d.Address.ToString())
).ToArray();
也许通过外部IP，您可以考虑(如果您在Web服务器上下文中)使用此方法
Request.ServerVariables["LOCAL_ADDR"];
我也在问你同样的问题，我在这篇stackoverflow的文章中找到了它。
这对我很管用。
private static string GetLocalIpAdresse()
{
var host = Dns.GetHostEntry(Dns.GetHostName());
foreach(var ip in host.AddressList)
{
if (ip.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
return ip.ToString();
}
}
throw new Exception ("No network adapters with an IPv4 address in the system");
}
这个问题没有说ASP。NET MVC，但我还是把这个留在这里:
Request.UserHostAddress
