c# - 将主机名解析为 IP

Question

我为此进行了大量的谷歌搜索，我发现了很多例子，但没有一个对我有用。这是一个简单的问题，我觉得没有定义新类\模块等就有一个简单的答案......

我的代码是这样的:

Console.WriteLine ("Please enter an IP address or hostname");
string host = Console.ReadLine ();
***IP = resolved "host"*** 
Socket s = new Socket (AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP);    
s.Connect (IP, 80);
s.close();

我如何实际解析 IP 变量？

Answer 1

您可以简单地使用 DNS类这样做:

IPHostEntry hostEntry;

hostEntry= Dns.GetHostEntry(host);

//you might get more than one ip for a hostname since 
//DNS supports more than one record

if (hostEntry.AddressList.Length > 0)
{
      var ip = hostEntry.AddressList[0];
      Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP);
      s.Connect(ip, 80);
}