获取客户端IP， 生成 GUID

using System;
using System.Configuration;
using System.Net;
using System.IO;
using System.Text;
using System.Collections.Generic;
namespace QinLanRegionalHealth.Helper
{

    public class PubConstant
    {
        /// <summary>
        /// 获取连接字符串
        /// </summary>
        public static string ConnectionString
        {
            get
            {
                string _connectionString = ConfigurationManager.AppSettings["ConnectionString"];
                return _connectionString;
            }
        }

        /// <summary>
        /// 得到web.config里配置项的数据库连接字符串。
        /// </summary>
        /// <param name="configName"></param>
        /// <returns></returns>
        public static string GetConnectionString(string configName)
        {
            string connectionString = ConfigurationManager.AppSettings[configName];
            return connectionString;
        }

        public enum LogMode
        {
            NoLog,
            LogEasy,
            LogSQL
        }

        /// <summary>
        /// 配置文件中 日志记录模式【0代表不记录，1代表简单记录，2代表详细记录，包含sql语句等】
        /// </summary>
        public static string LogModeConfig
        {
            get
            {
                string _LogMode = ConfigurationManager.AppSettings["LogMode"];
                //若不是012，则强制赋值为0，不进行日志记录
                if (_LogMode != "0" && _LogMode != "1" && _LogMode != "2")
                {
                    _LogMode = "0";
                }

                return _LogMode;
            }
        }

        #region 获取web客户端ip
        /// <summary>
        /// 获取web客户端ip【在用】
        /// </summary>
        /// <returns></returns>
        public static string GetWebClientIp()
        {

            string userIP = "未获取用户IP";

            try
            {
                if (System.Web.HttpContext.Current == null
            || System.Web.HttpContext.Current.Request == null
            || System.Web.HttpContext.Current.Request.ServerVariables == null)
                    return "";

                string CustomerIP = "";

                //CDN加速后取到的IP simone 090805
                CustomerIP = System.Web.HttpContext.Current.Request.Headers["Cdn-Src-Ip"];
                if (!string.IsNullOrEmpty(CustomerIP))
                {
                    return CustomerIP;
                }

                CustomerIP = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

                if (!String.IsNullOrEmpty(CustomerIP))
                    return CustomerIP;

                if (System.Web.HttpContext.Current.Request.ServerVariables["HTTP_VIA"] != null)
                {
                    CustomerIP = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
                    if (CustomerIP == null)
                        CustomerIP = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
                }
                else
                {
                    CustomerIP = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];

                }

                if (string.Compare(CustomerIP, "unknown", true) == 0)
                    return System.Web.HttpContext.Current.Request.UserHostAddress;
                return CustomerIP;
            }
            catch { }

            return userIP;

        }

        private static string localIpAdd;

        /// <summary>
        /// 获取客户端的IP地址
        /// </summary>
        public static string LocalIpAdd
        {
            get
            {
                #region MyRegion

                ////StringBuilder sbIPadds = new StringBuilder();
                ////string hostname = Dns.GetHostName();//得到本机名  
                //////IPHostEntry localhost = Dns.GetHostByName(hostname);//方法已过期，只得到IPv4的地址 <SPAN style="WHITE-SPACE: pre"> </SPAN> 
                ////IPHostEntry localhost = Dns.GetHostEntry(hostname);
                //////IPAddress localaddr = localhost.AddressList[0];
                ////foreach (IPAddress ip in localhost.AddressList)
                ////{
                ////    if (ip.AddressFamily.ToString() == "InterNetwork")
                ////    {
                ////        sbIPadds.Append(ip.ToString());
                ////    }
                ////}
                ////localIpAdd = sbIPadds.ToString();

                ////return localIpAdd;
                #endregion
                localIpAdd = GetWebClientIp();
                return localIpAdd;
            }
        }

        //获取本机的公网IP
        public static string GetWWWIP()
        {
            string tempip = "";
            try
            {
                WebRequest wr = WebRequest.Create("http://city.ip138.com/ip2city.asp");
                Stream s = wr.GetResponse().GetResponseStream();
                StreamReader sr = new StreamReader(s, Encoding.Default);
                string all = sr.ReadToEnd(); //读取网站的数据

                int start = all.IndexOf("[") + 1;
                int end = all.IndexOf("]", start);
                tempip = all.Substring(start, end - start);
                sr.Close();
                s.Close();
            }
            catch
            {
            }
            return tempip;
        }

        #endregion 获取web客户端ip

        #region GUID生成

        /// <summary>
        /// GUID生成
        /// </summary>
        /// <returns></returns>
        public static string MakeGUID()
        {
            return Guid.NewGuid().ToString();
        }

        /// <summary>
        /// GUID批量生成
        /// </summary>
        /// <param name="count">个数</param>
        /// <returns>格式为 string[]</returns>
        public static string[] MakeGUID(int count)
        {
            string[] guidArray = new string[] { };
            if (count != 0)
            {
                for (int i = 0; i < count; i++)
                {
                    guidArray[i] = Guid.NewGuid().ToString();
                }
            }

            return guidArray;
        }

        #endregion GUID生成

    }
}