C#获取IP跟整数IP方法

 1 using System; 2 using System.Text; 3 using System.Text.RegularExpressions; 4 using System.Web; 5  6 namespace HoverTree.HoverTreeFrame.HvtNet 7 { 8 public class HoverTreeIP 9 {10 /// <summary>11 /// 获取真实IP12 /// </summary>13 /// <returns></returns>14 public static string GetHoverTreeIp()15 {//http://tool.hovertree.com/info/ip/16 string result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];17 if (null == result || result == String.Empty)18 {19 result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];20 }21 if (null == result || result == String.Empty)22 {23 result = HttpContext.Current.Request.UserHostAddress;24 }25 return result;26 }27 28 public static bool HvtIsIP(string ip)29 {30 return Regex.IsMatch(ip, @"^((23[0-3]|1\d{2}|[1-9]\d|[1-9])\.)((25[0-5]|2[0-4]\d|1?\d{1,2})\.){2}((25[0-5]|2[0-4]\d|1?\d{1,2}))$") ;31 }32 33 /// <summary>34 /// 把IP地址转为整数 hovertree.com35 /// </summary>36 /// <param name="ip"></param>37 /// <returns></returns>38 public static long HvtIpToLong(string ip)39 {40 char[] separator = new char[] { '.' };41 string[] items = ip.Split(separator);42 return long.Parse(items[0]) << 2443 | long.Parse(items[1]) << 1644 | long.Parse(items[2]) << 845 | long.Parse(items[3]);46 }47 48 /// <summary>49 /// 把整数转为IP 何问起50 /// </summary>51 /// <param name="ipLong"></param>52 /// <returns></returns>53 public static string HvtLongToIp(long ipLong)54 {//http://hovertree.com/hvtart/bjae/cn5qrmxw.htm55 StringBuilder sb = new StringBuilder();56 sb.Append((ipLong >> 24) & 0xFF).Append(".");57 sb.Append((ipLong >> 16) & 0xFF).Append(".");58 sb.Append((ipLong >> 8) & 0xFF).Append(".");59 sb.Append(ipLong & 0xFF);60 return sb.ToString();61 }62 }