为什么dns.gethotentry（）方法返回地址列表为空？ [英] why dns.gethotentry() method return addresslist as empty?

问题描述

我使用以下代码获取IP地址：

  var ip = Dns.GetHostEntry（host）; 
 var ipaddress = ip.AddressList.FirstOrDefault（x => x.AddressFamily == AddressFamily.InterNetwork）.ToString（）; 
  

我可以从命令提示符ping此主机名。

但是当我使用 GethostEntry（）时，会正确返回主机名。

，但$ code> AddressList 为空。

而且它不工作，而我正在给本地机器ipaddress。

为什么会发生？

<尝试使用以下代码：

  PHostEntry主机;使用此代码的div class =h2_lin>解决方案


string localIP =;
host = Dns.GetHostEntry（Dns.GetHostName（））;
foreach（IPAddress ip in host.AddressList）
{
if（ip.AddressFamily == AddressFamily.InterNetwork）
{
localIP = ip.ToString（）;
}
}
返回localIP;


I use the following code to get the IP address:

var ip =  Dns.GetHostEntry(host);                     
var ipaddress = ip.AddressList.FirstOrDefault(x => x.AddressFamily == AddressFamily.InterNetwork).ToString();

i can able to ping this hostname from command prompt.

but when i use GethostEntry(), it return the hostname correctly.

but the AddressList is empty.

And also it does not working, while i am giving local machine ipaddress.
why its happen?

解决方案

try using using this code:

PHostEntry host;
 string localIP = "";
host = Dns.GetHostEntry(Dns.GetHostName());
  foreach (IPAddress ip in host.AddressList)
{
 if (ip.AddressFamily == AddressFamily.InterNetwork)
 {
    localIP = ip.ToString();
   }
}
 return localIP;

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