/// <summary>
        /// 查找分页列表(带条件,带多字段排序)
        /// </summary>
        /// <param name="pageSize">每页记录数。</param>
        /// <param name="pageIndex">页码。首页从1开始</param>
        /// <param name="totalNumber">总记录数</param>
        /// <param name="where">查询表达式</param>
        /// <param name="orderParams">排序【null-不设置】</param>
        public virtual IQueryable<T> FindPageList(int pageSize, int pageIndex, out int totalNumber, Expression<Func<T, bool>> where, OrderParam[] orderParams)
        {
            if (pageIndex < 1) pageIndex = 1;
            if (pageSize < 1) pageSize = 10;
            IQueryable<T> _list = dbContext.Set<T>().Where(where);
            var _orderParames = Expression.Parameter(typeof(T), "o");
            if (orderParams != null && orderParams.Length > 0)
            {
                for (int i = 0; i < orderParams.Length; i++)
                {
                    //根据属性名获取属性
                    var _property = typeof(T).GetProperty(orderParams[i].PropertyName);
                    //创建一个访问属性的表达式
                    var _propertyAccess = Expression.MakeMemberAccess(_orderParames, _property);
                    var _orderByExp = Expression.Lambda(_propertyAccess, _orderParames);
                    string _orderName = orderParams[i].Method == OrderMethod.ASC ? "OrderBy" : "OrderByDescending";
                    MethodCallExpression resultExp = Expression.Call(typeof(Queryable), _orderName, new Type[] { typeof(T), _property.PropertyType }, _list.Expression, Expression.Quote(_orderByExp));
                    _list = _list.Provider.CreateQuery<T>(resultExp);
                }
            }
            totalNumber = _list.Count();
            return _list.Skip((pageIndex - 1) * pageSize).Take(pageSize);
        }

 var _property = typeof(T).GetProperty(orderParams[i].PropertyName);  

这行好像有问题