获取客户端IP

 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;



        }