ADO SQL手写分页

最新推荐文章于 2020-12-23 12:44:40 发布

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最新推荐文章于 2020-12-23 12:44:40 发布

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CC 4.0 BY-SA版权

文章标签： ui

原文链接：http://www.cnblogs.com/MNCnblogs/p/10446847.html

本文详细介绍了一种使用C#实现数据库分页查询的方法，包括实现层的具体代码、控制器的逻辑处理以及UI前台的分页按钮展示。通过SQL语句结合ROW_NUMBER()函数实现了高效的数据分页，适用于各种需要展示大量数据的场景。

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//实现层

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public List<UserModel> ShowListPage(int pageindex, int pagesize)
{
string sql = string.Format("select top({0}) *from (select ROW_NUMBER() over (order by Id)iid,*from UserType)fy where iid>(({1}-1)*{2})", pagesize, pageindex, pagesize);
DataTable dt = DBHelper.GetTable(sql);
var str = JsonConvert.SerializeObject(dt);
return JsonConvert.DeserializeObject<List<UserModel>>(str);
}

//控制器

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public ActionResult ShowPage(int pageindex=1)
{
//一页显示2条数据
int pagesize = 2;
//记录总的条数
int pagecount = idal.ShowCount();

//当条数为总数时
if (pagecount % pagecount == 0)
{
ViewBag.fy = pagecount / pagesize;
}
else
{
ViewBag.fy = (pagecount / pagesize) + 1;
}
//页数
ViewBag.pageindex = pageindex;
ViewBag.pagesize = pagesize;
ViewBag.pagecount = pagecount;
ViewBag.list = idal.ShowListPage(pageindex, pagesize);
var resulr = idal.ShowCount();
return View(resulr);
}

//UI前台显示

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@{
var shang = ViewBag.pageindex;
shang--;
if (shang < 0) { shang = 1; };
{
<input id="Button1" type="button" value="首页" onclick="location.href='/User/ShowPage?pageindex=1'" />
<input id="Button1" type="button" value="上一页" onclick="location.href='/User/ShowPage?pageindex=@shang'" />
}
}

@{
var next = ViewBag.pageindex;
next++;
if (next > ViewBag.fy) { next = ViewBag.fy; };
{
<input id="Button1" type="button" value="下一页" onclick="location.href='/User/ShowPage?pageindex=@next'" />
<input id="Button1" type="button" value="尾页" onclick="location.href='/User/ShowPage?pageindex=@ViewBag.fy'" />
}
}

SQL语句

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--高老师传授的分页，毕生受用！！
select top(2) *from (select ROW_NUMBER() over (order by Id)iid,*from Exam02)fy where iid>((1-1)*2)

转载于:https://www.cnblogs.com/MNCnblogs/p/10446847.html