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
了解你的公共IP的唯一方法是让别人告诉你;这段代码可以帮助你:
public string GetPublicIP()
{
String direction = "";
WebRequest request = WebRequest.Create("http://checkip.dyndns.org/");
using (WebResponse response = request.GetResponse())
using (StreamReader stream = new StreamReader(response.GetResponseStream()))
{
direction = stream.ReadToEnd();
}
//Search for the ip in the html
int first = direction.IndexOf("Address: ") + 9;
int last = direction.LastIndexOf("</body>");
direction = direction.Substring(first, last - first);
return direction;
}
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);
}
}
}
为了获取当前的公网IP地址，你所需要做的就是在页面加载事件中创建一个ASPX页面，代码如下:
Response.Write(HttpContext.Current.Request.UserHostAddress.ToString());
另一种获取公共IP地址的方法是使用OpenDNS的resolve1.opendns.com服务器，并将myip.opendns.com作为请求。
在命令行上，这是:
nslookup myip.opendns.com resolver1.opendns.com
或者在c#中使用DNSClient nuget:
var lookup = new LookupClient(new IPAddress(new byte[] { 208, 67, 222, 222 }));
var result = lookup.Query("myip.opendns.com", QueryType.ANY);
这比敲击http端点并解析响应要简洁一些。
using System.Net;
string host = Dns.GetHostName();
IPHostEntry ip = Dns.GetHostEntry(host);
Console.WriteLine(ip.AddressList[0].ToString());
刚在我的机器上测试过了，还能用。
如果你在内部网络中运行，你将能够获得本地机器的IP地址，如果不是，你将获得外部IP地址: 网络:
//this will bring the IP for the current machine on browser
System.Web.HttpContext.Current.Request.UserHostAddress
桌面:
//This one will bring all local IPs for the desired namespace
IPAddress[] localIPs = Dns.GetHostAddresses(Dns.GetHostName());
