public static UserLoginView GetUserLoginView(string signOnId, params object[] fetchOptions)

        {

            //在处理前先判断方法参数是否为空,二种方式采用||组合判断，各为：signonid==null,signonid=string.empty

            if ((signOnId == null) || (signOnId == string.Empty))

            {

                //为空抛异常

                throw new CoreBusinessException(99999L, "{0} method must be called with a valid Sign On Id ", new string[] { MethodBase.GetCurrentMethod().Name });

            }

            //用方法的参数构造内部类criteria

            Criteria criteria = new Criteria(signOnId, fetchOptions);

           //用return返回本类的对象

           return (UserLoginView) CoreBusinessCollectionBase.Director.Fetch(criteria);

        }