ADO SQL手写分页

 

//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)