EF Core分页

1. Skip(3).Take(8) 最好显式指定排序规则
2. 需要知道满足条件的数据的总条数：
   用IQueryable的复用
   LongCount和Count
3. 页数：long pageCount = (long)Math.Ceiling(count * 1.0 / pageSize);

class Program
{static async Task Main(string[] args){using (MyDbContext ctx = new MyDbContext()){PrintPage(1, 1);}}/// <summary>/// 打印某页数据/// </summary>/// <param name="pageIndex">页码（从1开始）</param>/// <param name="pageSize">每页数据条数</param>static void PrintPage(int pageIndex, int pageSize){using (MyDbContext ctx = new MyDbContext()){IQueryable<Book> books = ctx.Books.Where(o => !o.Name.Contains("计算机"));var item = books.Skip((pageIndex - 1) * pageSize).Take(pageSize);foreach (Book book in item){Console.WriteLine(book.Name);}long count = books.LongCount();long pageCount = (long)Math.Ceiling((double)count / pageSize);Console.WriteLine("总页数：" + pageCount);}}
}