using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _Default : System.Web.UI.Page
{
public TextDataContext context = new TextDataContext();
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack )
{
////定义一个值记住当前页面时第几页
Session["ys"] = 1;
//int qu = (Convert.ToInt32(Session["ys"]) - 1) * 5;
////页面加载指定数据源
//Repeater1.DataSource = context.Car.Skip(qu).Take(5);//跳过前多少条去前几条
//Repeater1.DataBind();
TiaoZhuan(1);
Literal1.Text = "";
}
}
//首页
protected void Button2_Click(object sender, EventArgs e)
{
int ys = 1;
Session["ys"] = ys;
TiaoZhuan(ys);
}
//上一页
protected void Button4_Click(object sender, EventArgs e)
{
Literal1.Text = "";
int ys = Convert.ToInt32(Session["ys"]);
//判断是否是第一页
if (ys > 1)
{
ys = ys - 1;
Session["ys"] = ys;
TiaoZhuan(ys);
}
else
{
Literal1.Text = " <script type='text/javascript'> alert('当前已经是第一页了！') </script>";
}
//Label3.Text = ys.ToString();
}
//下一页
protected void Button5_Click(object sender, EventArgs e)
{
Literal1.Text = "";
int ys = Convert.ToInt32(Session["ys"]);
//判断是否是最后一页
int zys = ALLYS();
if (ys <zys)
{
ys = ys + 1;
Session["ys"] = ys;
TiaoZhuan(ys);
}
else
{
Literal1.Text = " <script type='text/javascript'> alert('当前已经最后一页啦！') </script>";
}
//Label3.Text = ys + "/" + zys;
}
//尾页
protected void Button1_Click(object sender, EventArgs e)
{
int ys = ALLYS();
Session["ys"] = ys;
TiaoZhuan(ys);
}
//跳转页面
protected void Button3_Click(object sender, EventArgs e)
{
int ys=1;
try
{
ys = Convert.ToInt32(TextBox1.Text);
}
catch(Exception)
{
Literal1.Text = " <script type='text/javascript'> alert('请输入页数！') </script>";
}
int zys=ALLYS();
if ( 1<=ys && ys <= zys)
{
TiaoZhuan(ys);
Session["ys"] = ys;
}
else
{
Literal1.Text = " <script type='text/javascript'> alert('页面超出范围！') </script>";
}
}
//跳转到第几页
public void TiaoZhuan( int ys)
{
int qu = (ys - 1) * 5;
//页面加载指定数据源
Repeater1.DataSource = context.Car.Skip(qu).Take(5);//跳过前多少条去前几条
Repeater1.DataBind();
int zys = ALLYS();
Label3.Text = ys + "/" + zys;
}
//取总页数
public int ALLYS()
{
int all = context.Car.Count();
int zys;
if (all % 5 == 0)
{
zys = all / 5;
}
else
{
zys = all / 5 + 1;
}
return zys;
}
}