下面是我用来返回对象的分页列表的代码:
string query2 = @"
select count(*) as TotalCount from blogposts p where p.Deleted = 0 and p.PublishDate <= @date
select * from (
select p.*,
row_number() over(order by publishdate desc) as rownum
from blogposts as p
where p.Deleted = 0 and p.PublishDate <= @date
) seq
where seq.rownum between @x and @y";
using (var cn = new SqlConnection(connectionString))
{
cn.Open();
using (var multi = cn.QueryMultiple(query2, new { x= lower, y = upper, date = DateTime.UtcNow }))
{
var totalCount = multi.Read<int>().Single();
var posts = multi.Read<PostModel>().ToList();
return new PagedList<PostModel>(posts, page, pageSize, x => totalCount);
}
}
虽然这可行,但这意味着我必须定义我的条件两次,一次用于计数查询,一次用于结果集查询。我可以只执行一个查询,而不是求助于字符串连接:
string query = @"
select * from (select p.*,
row_number() over(order by publishdate desc) as rownum,
count(*) over() as TotalCount
from blogposts as p) seq
where seq.rownum between @x and @y";
但是,我似乎无法使用 Dapper 进行映射。我不能使用与上面相同的方法,因为没有多个结果。我尝试过使用多重映射,但这预计会返回一个 IEnumerable。
我将如何映射到以下内容?
public class PostList
{
public IEnumerable<PostModel> Posts;
public int TotalCount { get; set; }
}
谢谢
本