ASP.NET之Datalist详解（分页）
Datalist控件数据源绑定方法和GridView控件基本相似，但要显示数据需要设计控件的模版
Datalist分页源码
.apsx界面
<head runat="server">
<title></title>
<style type="text/css">
.style3
{
width: 19px;
}
.style5
{
width: 157px;
}
.style7
{
width: 133px;
}
.style8
{
width: 294px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<table border="0" cellpadding="0" cellspacing="0"
style="width: 653px">
<tr>
<td align="left">
<asp:DataList ID="DataList1" runat="server" style="margin-right: 5px"
Width="575px" onitemcommand="DataList1_ItemCommand"
onitemdatabound="DataList1_ItemDataBound" BackColor="LightGoldenrodYellow"
BorderColor="Tan" BorderWidth="1px" CellPadding="2" ForeColor="Black">
<HeaderStyle BackColor="Tan" Font-Bold="True" />
<ItemTemplate>
<table>
<tr style="border-bottom-style: groove; border-bottom-width: medium; border-bottom-color: #FFFFFF">
<td rowspan="3" align="center" class="style3">
<a href='#'>
<img border="0" height="80"
src='images/showimg.gif'
width="80"> </img> </a>
</td>
<td align="left" class="style8">
<asp:Image ID="Image4" runat="server" ImageUrl="~/images/ico2.gif" />
<a><%#Eval("bg_name")%></a>
</td>
<td align="left" class="style7">
</td>
<td class="style5">
</td>
</tr>
<tr>
<td align="left" class="style8">
空间主人:<a><%#Eval("bg_name") %></a></td>
<td align="left" class="style7">
创建时间：<a><%#Eval("bg_createtime","{0:D}") %></a></td>
<td class="style5">
</td>
</tr>
<tr>
<td align="left" colspan="3">
个性签名：<a ><%#Eval("bg_p_autograph").ToString().Length > 20 ? Eval("bg_p_autograph").ToString().Substring(0, 20) + "..." : Eval("bg_p_autograph")%></a></td>
</tr>
</table>
</ItemTemplate>
<AlternatingItemStyle BackColor="PaleGoldenrod" />
<FooterStyle BackColor="Tan" />
<FooterTemplate>
<div style="text-align: center">
<table id="Page" border="1" cellpadding="0" cellspacing="0"
style="font-size: 12px; width: 68%">
<tr>
<td >
<asp:Label ID="labCurrentPage" runat="server"></asp:Label>/
<asp:Label ID="labPageCount" runat="server"></asp:Label>
<asp:LinkButton ID="lnkbtnFirst" runat="server" CommandName="first" Font-Underline="False"
ForeColor="Black">首页</asp:LinkButton>
<asp:LinkButton ID="lnkbtnFront" runat="server" CommandName="pre" Font-Underline="False"
ForeColor="Black">上一页</asp:LinkButton>
<asp:LinkButton ID="lnkbtnNext" runat="server" CommandName="next" Font-Underline="False"
ForeColor="Black">下一页</asp:LinkButton>
<asp:LinkButton ID="lnkbtnLast" runat="server" CommandName="last" Font-Underline="False"
ForeColor="Black">尾页</asp:LinkButton>
跳转至：<asp:TextBox ID="txtPage" runat="server" Width="35px" Height="21px"></asp:TextBox>
<asp:Button ID="Button1" runat="server" CommandName="search" Text="GO"
Height="19px" />
<br />
</td>
</tr>
</table>
</div>
</FooterTemplate>
<SelectedItemStyle BackColor="DarkSlateBlue" ForeColor="GhostWhite" />
</asp:DataList>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
核心在Datalist控件的
ItemTemplate和FooterTemplate 至于其他杂七杂八的都是做的些美工。
.cs 界面
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
public partial class _Default : System.Web.UI.Page
{
protected static PagedDataSource pds = new PagedDataSource();//创建一个分页数据源的对象且一定要声明为静态
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//调用自定义方法绑定数据到控件（为以后做MVC打下基础）
BindDataList(0);
}
}
//对datelist进行数据绑定 www.2cto.com
private void BindDataList(int currentpage)
{
pds.AllowPaging = true;//允许分页
pds.PageSize = 3;//每页显示3条数据
pds.CurrentPageIndex = currentpage;//当前页为传入的一个int型值
//这里将数据库连接字符串写在web.config文件中，通过这个语句来调用，这样方便对连接字符串的修改
string connStr = ConfigurationManager.ConnectionStrings["connStr"].ConnectionString;
//创建数据库连接对象
SqlConnection con = new SqlConnection(connStr);
//定义查询语句,这里最好将SQL语句在SQL中写好并验证正确确在复制粘贴过来（在对数据查询时最好只查所需的一些不需要的数据就不要取出，这样可以提高运行的效率）
string strSql = "SELECT * FROM bg_spatial";//定义一条SQL语句
con.Open();//打开数据库连接 (当然此句可以不写的)
SqlDataAdapter sda = new SqlDataAdapter(strSql, con);
DataSet ds = new DataSet();
sda.Fill(ds);//把执行得到的数据放在数据集中
pds.DataSource = ds.Tables[0].DefaultView;//把数据集中的数据放入分页数据源中
DataList1.DataSource = pds;//绑定Datalist
DataList1.DataBind();
con.Close();
}
protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)
{
switch (e.CommandName)
{
//以下5个为 捕获用户点击 上一页 下一页等时发生的事件
case "first"://第一页
pds.CurrentPageIndex = 0;
BindDataList(pds.CurrentPageIndex);
break;
case "pre"://上一页
pds.CurrentPageIndex = pds.CurrentPageIndex - 1;
BindDataList(pds.CurrentPageIndex);
break;
case "next"://下一页
pds.CurrentPageIndex = pds.CurrentPageIndex + 1;
BindDataList(pds.CurrentPageIndex);
break;
case "last"://最后一页
pds.CurrentPageIndex = pds.PageCount - 1;
BindDataList(pds.CurrentPageIndex);
break;
case "search"://页面跳转页
if (e.Item.ItemType == ListItemType.Footer)
{
int PageCount = int.Parse(pds.PageCount.ToString());
TextBox txtPage = e.Item.FindControl("txtPage") as TextBox;
int MyPageNum = 0;
if (!txtPage.Text.Equals(""))
MyPageNum = Convert.ToInt32(txtPage.Text.ToString());
if (MyPageNum <= 0 || MyPageNum > PageCount)
{
Response.Write("<script>alert('请输入页数并确定没有超出总页数！')</script>");
txtPage.Text = "";
}
else
BindDataList(MyPageNum - 1);
}
break;
}
}
protected void DataList1_ItemDataBound(object sender, DataListItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Footer)
{
//以下六个为得到脚模板中的控件,并创建变量.
Label CurrentPage = e.Item.FindControl("labCurrentPage") as Label;
Label PageCount = e.Item.FindControl("labPageCount") as Label;
LinkButton FirstPage = e.Item.FindControl("lnkbtnFirst") as LinkButton;
LinkButton PrePage = e.Item.FindControl("lnkbtnFront") as LinkButton;
LinkButton NextPage = e.Item.FindControl("lnkbtnNext") as LinkButton;
LinkButton LastPage = e.Item.FindControl("lnkbtnLast") as LinkButton;
CurrentPage.Text = (pds.CurrentPageIndex + 1).ToString();//绑定显示当前页
PageCount.Text = pds.PageCount.ToString();//绑定显示总页数
if (pds.IsFirstPage)//如果是第一页,首页和上一页不能用
{
FirstPage.Enabled = false;
PrePage.Enabled = false;
}
if (pds.IsLastPage)//如果是最后一页"下一页"和"尾页"按钮不能用
{
NextPage.Enabled = false;
LastPage.Enabled = false;
}
}
}
}
摘自 jory
