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;        }