1 #region 获取客户端IP地址
  2 
  3         /// <summary>  
  4         /// 获取客户端IP地址  
  5         /// </summary>  
  6         /// <returns></returns>  
  7         public static string GetIP()
  8         {
  9             string result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
 10             if (string.IsNullOrEmpty(result))
 11             {
 12                 result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
 13             }
 14             if (string.IsNullOrEmpty(result))
 15             {
 16                 result = HttpContext.Current.Request.UserHostAddress;
 17             }
 18             if (string.IsNullOrEmpty(result))
 19             {
 20                 return "0.0.0.0";
 21             }
 22             return result;
 23         }
 24 
 25         #endregion
 26 
 27         #region 取客户端真实IP
 28 
 29         ///  <summary>    
 30         ///  取得客户端真实IP。如果有代理则取第一个非内网地址    
 31         ///  </summary>    
 32         public static string GetIPAddress
 33         {
 34             get
 35             {
 36                 var result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
 37                 if (!string.IsNullOrEmpty(result))
 38                 {
 39                     //可能有代理    
 40                     if (result.IndexOf(".") == -1)        //没有“.”肯定是非IPv4格式    
 41                         result = null;
 42                     else
 43                     {
 44                         if (result.IndexOf(",") != -1)
 45                         {
 46                             //有“,”，估计多个代理。取第一个不是内网的IP。    
 47                             result = result.Replace("  ", "").Replace("‘", "");
 48                             string[] temparyip = result.Split(",;".ToCharArray());
 49                             for (int i = 0; i < temparyip.Length; i++)
 50                             {
 51                                 if (IsIPAddress(temparyip[i])
 52                                         && temparyip[i].Substring(0, 3) != "10."
 53                                         && temparyip[i].Substring(0, 7) != "192.168"
 54                                         && temparyip[i].Substring(0, 7) != "172.16.")
 55                                 {
 56                                     return temparyip[i];        //找到不是内网的地址    
 57                                 }
 58                             }
 59                         }
 60                         else if (IsIPAddress(result))  //代理即是IP格式    
 61                             return result;
 62                         else
 63                             result = null;        //代理中的内容  非IP，取IP    
 64                     }
 65 
 66                 }
 67 
 68                 string IpAddress = (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null && HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != String.Empty) ? HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] : HttpContext.Current.Request.ServerVariables["HTTP_X_REAL_IP"];
 69 
 70                 if (string.IsNullOrEmpty(result))
 71                     result = HttpContext.Current.Request.ServerVariables["HTTP_X_REAL_IP"];
 72 
 73                 if (string.IsNullOrEmpty(result))
 74                     result = HttpContext.Current.Request.UserHostAddress;
 75 
 76                 return result;
 77             }
 78         }
 79 
 80         #endregion
 81 
 82         #region  判断是否是IP格式
 83 
 84         ///  <summary>  
 85         ///  判断是否是IP地址格式  0.0.0.0  
 86         ///  </summary>  
 87         ///  <param  name="str1">待判断的IP地址</param>  
 88         ///  <returns>true  or  false</returns>  
 89         public static bool IsIPAddress(string str1)
 90         {
 91             if (string.IsNullOrEmpty(str1) || str1.Length < 7 || str1.Length > 15) return false;
 92 
 93             const string regFormat = @"^d{1,3}[.]d{1,3}[.]d{1,3}[.]d{1,3}$";
 94 
 95             var regex = new Regex(regFormat, RegexOptions.IgnoreCase);
 96             return regex.IsMatch(str1);
 97         }
 98 
 99         #endregion
100 
101         #region 获取公网IP
102         /// <summary>  
103         /// 获取公网IP  
104         /// </summary>  
105         /// <returns></returns>  
106         public static string GetNetIP()
107         {
108             string tempIP = "";
109             try
110             {
111                 System.Net.WebRequest wr = System.Net.WebRequest.Create("http://city.ip138.com/ip2city.asp");
112                 System.IO.Stream s = wr.GetResponse().GetResponseStream();
113                 System.IO.StreamReader sr = new System.IO.StreamReader(s, System.Text.Encoding.GetEncoding("gb2312"));
114                 string all = sr.ReadToEnd(); //读取网站的数据  
115 
116                 int start = all.IndexOf("[") + 1;
117                 int end = all.IndexOf("]", start);
118                 tempIP = all.Substring(start, end - start);
119                 sr.Close();
120                 s.Close();
121             }
122             catch
123             {
124                 if (System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName()).AddressList.Length > 1)
125                     tempIP = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName()).AddressList[1].ToString();
126                 if (string.IsNullOrEmpty(tempIP))
127                     return GetIP();
128             }
129             return tempIP;
130         }
131         #endregion