获取客户端IP

#region 获取 客户端IP
      
      /// <summary>
      /// 获取客户端真实IP 
      /// </summary>
      /// <returns></returns>
      public static string GetClientRealIP()
        {
            string ip;
            try
            {
                HttpRequest request = HttpContext.Current.Request;

                if (request.ServerVariables["HTTP_VIA"] != null)
                {
                    ip = request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString().Split(',')[0].Trim();
                }
                else
                {
                    ip = request.UserHostAddress;
                }
            }
            catch (Exception e)
            {
                //throw e;
                //如果真实IP获取不到
                ip = GetClientViaIP(); 
            }

            return ip;
        }

      /// <summary>
      /// 获取客户端IP 
      /// </summary>
      /// <returns></returns>
      public static string GetClientViaIP()
        {
            string viaIp = null;

            try
            {
                HttpRequest request = HttpContext.Current.Request;

                if (request.ServerVariables["HTTP_VIA"] != null)
                {
                    viaIp = request.UserHostAddress;
                }

            }
            catch (Exception e)
            {
                //throw e;
               viaIp= "000.000.0.0";
            }

            return viaIp;
        }

      #endregion

      public static string GetClientHostName()
      {
          string str = null;
          try
          {
              HttpRequest request = HttpContext.Current.Request;
              str = request.ServerVariables["REMOTE_HOST"];
          }
          catch (Exception)
          {

              str = null;
          }

          return str;
      }