WCF取得访问端的IP地址

 [OperationContract]

 public string GetCustomerIP()

 {

      string CustomerIP = "";

     if( HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)

          CustomerIP = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();

       else if (HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"] != null)                

           CustomerIP = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"].ToString();

      return CustomerIP;

  }