#region public static string GetClientIP() 获取客户端的IP地址/// <summary>/// 获取客户端的IP地址/// </summary>/// <returns></returns>public static string GetClientIP(){string result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];if (!string.IsNullOrEmpty(result)){//可能有代理 if (result.IndexOf(".", StringComparison.Ordinal) == -1)//没有"."肯定是非IPv4格式 result = null;else{if (result.IndexOf(",", StringComparison.Ordinal) != -1){//有","，估计多个代理。取第一个不是内网的IP。 result = result.Replace(" ", "").Replace("", "");string[] temparyip = result.Split(",;".ToCharArray());for (int i = 0; i < temparyip.Length; i++){if (IsIPAddress(temparyip[i]) && temparyip[i].Substring(0, 3) != "10." && temparyip[i].Substring(0, 7) != "192.168" && temparyip[i].Substring(0, 7) != "172.16."){return temparyip[i];//找到不是内网的地址
                            }}}else if (IsIPAddress(result)) //代理即是IP格式 return result;elseresult = null;//代理中的内容 非IP，取IP
                }}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["REMOTE_ADDR"];if (string.IsNullOrEmpty(result))result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];if (string.IsNullOrEmpty(result))result = HttpContext.Current.Request.UserHostAddress;return result;}/// <summary>/// ip判断/// </summary>/// <param name="str1"></param>/// <returns></returns>private static bool IsIPAddress(string str1){if (string.IsNullOrEmpty(str1) || str1.Length < 7 || str1.Length > 15)return false;string regformat = @"^\d{1,3}[\.]\d{1,3}[\.]\d{1,3}[\.]\d{1,3}$";Regex regex = new Regex(regformat, RegexOptions.IgnoreCase);return regex.IsMatch(str1);}#endregion