C# 根据局域网IP获取主机名称

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace ConsoleTest
{
    class Program
    {
        static void Main(string[] args)
        {
            string hostName=GetHostNameByIp("10.10.66.118");
            Console.Write(hostName);
        }
        #region 根据局域网IP获取主机名称
        public static string GetHostNameByIp(string ip)
        {
            ip = ip.Trim();
            if (ip == string.Empty)
                return string.Empty;
            try
            {
                // 是否 Ping 的通
                if (Ping(ip))
                {
                    System.Net.IPHostEntry host = System.Net.Dns.GetHostEntry(ip);
                    return host.HostName;
                }
                else
                    return string.Empty;
            }
            catch (Exception)
            {
                return string.Empty;
            }
        }
        public static bool Ping(string ip)
        {
            System.Net.NetworkInformation.Ping p = new System.Net.NetworkInformation.Ping();
            System.Net.NetworkInformation.PingOptions options = new System.Net.NetworkInformation.PingOptions();
            options.DontFragment = true;
            string data = "Test Data!";
            byte[] buffer = Encoding.ASCII.GetBytes(data);
            int timeout = 1000; // Timeout 时间，单位：毫秒
            System.Net.NetworkInformation.PingReply reply = p.Send(ip, timeout, buffer, options);
            if (reply.Status == System.Net.NetworkInformation.IPStatus.Success)
                return true;
            else
                return false;
        }
        #endregion
    }
}