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asp.net DataList控件分页代码

2011-11-18 16:39 501 查看

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="DataList.aspx.cs" Inherits="TEST_DataList" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DataList ID="score" runat="server" HeaderStyle-BackColor="#aaaadd" AlternatingItemStyle-BackColor="Gainsboro"
EditItemStyle-BackColor="yellow">
<HeaderTemplate>
<table width="100%" border="1">
<tr>
<td align="center">
用户ID
</td>
<td align="center">
用户名
</td>
<td align="center">
密 码
</td>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td align="center">
<%# DataBinder.Eval(Container.DataItem,"用户ID") %>
</td>
<td align="center">
<%# DataBinder.Eval(Container.DataItem,"用户名") %>
</td>
<td align="center">
<%# DataBinder.Eval(Container.DataItem,"密码") %>
</td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:DataList>
<asp:LinkButton ID="lbnPrevPage" Text="上一页" CommandName="prev" OnCommand="Page_OnClick"
runat="server" />
<asp:LinkButton ID="lbnNextPage" Text="下一页" CommandName="next" OnCommand="Page_OnClick"
runat="server" />
共有<asp:Label ID="lblRecordCount" ForeColor="red" runat="server" />条记录 当前为<asp:Label
ID="lblCurrentPage" ForeColor="red" runat="server" />/<asp:Label ID="lblPageCount"
ForeColor="red" runat="server" />页
</div>
</form>
</body>
</html>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;
using System.Data;
using System.Data.SqlClient;

public partial class TEST_DataList : System.Web.UI.Page
{
//分页相关参数
int PageSize, RecordCount, PageCount, CurrentPage;
SqlConnection con = new SqlConnection("Data Source=localhost;Initial Catalog=CSDN;Persist Security Info=True;User ID=sa;Password=sa;");
protected void Page_Load(object sender, EventArgs e)
{
//设定PageSize
PageSize = 10;
if (!IsPostBack)
{
ListBind();
CurrentPage = 0;
ViewState["PageIndex"] = 0;

//计算总共有多少记录
RecordCount = CalculateRecord();
lblRecordCount.Text = RecordCount.ToString();

//计算总共有多少页
PageCount = RecordCount / PageSize;
lblPageCount.Text = PageCount.ToString();
ViewState["PageCount"] = PageCount;
}
}

//计算总共有多少条记录
public int CalculateRecord()
{
int intCount;
string strCount = "select count(*) as co from SYS_USERINF";
con.Open();
SqlCommand cmd = new SqlCommand(strCount, con);
SqlDataReader dr = cmd.ExecuteReader();
if (dr.Read())
{
intCount = Int32.Parse(dr["co"].ToString());
}
else
{
intCount = 0;
}
dr.Close();
con.Close();
return intCount;
}

ICollection CreateSource()
{
int StartIndex;
//设定导入的起终地址
StartIndex = CurrentPage * PageSize;
string strSel = "select * from SYS_USERINF";
DataSet ds = new DataSet();
SqlDataAdapter sda = new SqlDataAdapter(strSel, con);
sda.Fill(ds, StartIndex, PageSize, "Score");
return ds.Tables["Score"].DefaultView;
}

public void ListBind()
{
score.DataSource = CreateSource();
score.DataBind();
lbnNextPage.Enabled = true;
lbnPrevPage.Enabled = true;
if (CurrentPage == (PageCount - 1)) lbnNextPage.Enabled = false;
if (CurrentPage == 0) lbnPrevPage.Enabled = false;
lblCurrentPage.Text = (CurrentPage + 1).ToString();
}

public void Page_OnClick(Object sender, CommandEventArgs e)
{
CurrentPage = (int)ViewState["PageIndex"];
PageCount = (int)ViewState["PageCount"];
string cmd = e.CommandName;
//判断cmd，以判定翻页方向
switch (cmd)
{
case "next":
if (CurrentPage < (PageCount - 1)) CurrentPage++;
break;
case "prev":
if (CurrentPage > 0) CurrentPage--;
break;
}
ViewState["PageIndex"] = CurrentPage;
ListBind();
}
}

样式没有应用好的css，比较难看，但是分页功能就是如此实现的。上图：

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