EF 分页

public class PageListDto<T>
    {
        public int Count { get; set; }
        public List<T> Data { get; set; }
    }

 public static PageListDto<T> GetPageList<T, S>(this IQueryable<T> source, int pageIndex, int pageSize, Expression<Func<T, S>> orderBy, bool isDESC = false)
        {
            Type type = typeof(T);
            PageListDto<T> result = new PageListDto<T>();
            result.Count = source.Count();
            if (isDESC)
            {
                result.Data = source.OrderByDescending(orderBy).Skip((pageIndex - 1) * pageSize).Take(pageSize).ToList();
            }
            else
            {
                result.Data = source.OrderBy(orderBy).Skip((pageIndex - 1) * pageSize).Take(pageSize).ToList();
            }

            return result;
        }

 var dwadw = db.Z_TagInfo.Where(p => p.Id > 1)
                    .GetPageList(1, 10, p => p.Status);