使用DataList实现数据分页的技术

今天做网站的时候，用到了分页技术，我把使用方法记录下来，以便日后查阅以及帮助新手朋友们。

DataList控件可以按照列表的形式显示数据表中的多行记录，但是被显示的多行记录没有分页功能，使用起来不太方便。因此需要借助PagedDataSource类来实现分页，该类封装了数据控件的分页属性，其常用属性及说明如下表所示。

大致实现效果图如下：

具体代码如下：

前台（aspx）代码：

<div class="you_align">
        <table style="width:450px" cellpadding="0" cellspacing="0" align="center" >
            <tr><td>&nbsp;</td></tr>
            <tr>
               <td style="width: 600px; text-align: align; font-size: 9pt; height: 15px;" >
                  <asp:Label ID="labCP" runat="server" Text="当前第"></asp:Label>
                     <asp:Label ID="labPage" runat="server" Text="1"></asp:Label> &nbsp;页
                  <asp:Label ID="labTP" runat="server" Text="共"></asp:Label>
                     <asp:Label ID="labBackPage" runat="server"></asp:Label> 页
                  <asp:LinkButton ID="lnkbtnOne" runat="server" Font-Underline="False" ForeColor="Red" OnClick="lnkbtnOne_Click">第一页</asp:LinkButton>
                  <asp:LinkButton ID="lnkbtnUp" runat="server" Font-Underline="False" ForeColor="Red"  OnClick="lnkbtnUp_Click">上一页</asp:LinkButton>
                  <asp:LinkButton ID="lnkbtnNext" runat="server" Font-Underline="False" ForeColor="Red" OnClick="lnkbtnNext_Click">下一页</asp:LinkButton>&nbsp;
                  <asp:LinkButton ID="lnkbtnBack" runat="server" Font-Underline="False" ForeColor="Red" OnClick="lnkbtnBack_Click">尾页</asp:LinkButton>&nbsp;&nbsp;
               </td>
            </tr>
    </table>
    </div>

后台aspx.cs代码如下：

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class zwgk : System.Web.UI.Page
{
    CommonClass CC = new CommonClass();
 protected void Page_Load(object sender, EventArgs e)
    {
        bind();
        //政务公开
        ZWGK.DataSource = CC.GetDataSet("SELECT  * FROM News WHERE Style = ‘政务公开‘ order by Time Desc", "News");
        ZWGK.DataKeyField = "id";
        ZWGK.DataBind();
    }
    protected void bind()
    {
        //取得当前页的页码
        int curpage = Convert.ToInt32(this.labPage.Text);
        //使用PagedDataSource类实现DataList控件的分页功能
        PagedDataSource ps = new PagedDataSource();
        //获取数据集
        DataSet ds = CC.GetDataSet("select * from News where style=‘政务公开‘ order by Time Desc", "News");
        ps.DataSource = ds.Tables["News"].DefaultView;
        //是否可以分页
        ps.AllowPaging = true;
        //显示的数量
        ps.PageSize = 15;
        //取得当前页的页码
        ps.CurrentPageIndex = curpage - 1;
        this.lnkbtnUp.Enabled = true;
        this.lnkbtnNext.Enabled = true;
        this.lnkbtnBack.Enabled = true;
        this.lnkbtnOne.Enabled = true;
        if (curpage == 1)
        {
            //不显示第一页按钮
            this.lnkbtnOne.Enabled = false;
            //不显示上一页按钮
            this.lnkbtnUp.Enabled = false;
        }
        if (curpage == ps.PageCount)
        {
            //不显示下一页
            this.lnkbtnNext.Enabled = false;
            //不显示最后一页
            this.lnkbtnBack.Enabled = false;
        }
        //显示分页数量
        this.labBackPage.Text = Convert.ToString(ps.PageCount);
        //绑定DataList控件
        this.ZWGK.DataSource = ps;
        this.ZWGK.DataKeyField = "id";
        this.ZWGK.DataBind();

    }
    //第一页
    protected void lnkbtnOne_Click(object sender, EventArgs e)
    {
        this.labPage.Text = "1";
        this.bind();
    }
    //上一页
    protected void lnkbtnUp_Click(object sender, EventArgs e)
    {
        this.labPage.Text = Convert.ToString(Convert.ToInt32(this.labPage.Text) - 1);
        this.bind();
    }
    //下一页
    protected void lnkbtnNext_Click(object sender, EventArgs e)
    {
        this.labPage.Text = Convert.ToString(Convert.ToInt32(this.labPage.Text) + 1);
        this.bind();
    }
    //最后一页
    protected void lnkbtnBack_Click(object sender, EventArgs e)
    {
        this.labPage.Text = this.labBackPage.Text;
        this.bind();
    }
    protected void ZWGK_ItemCommand(object source, DataListCommandEventArgs e)
    {
        int id = Convert.ToInt32(ZWGK.DataKeys[e.Item.ItemIndex].ToString());
        Response.Write("<script language=javascript>location=‘show_News.aspx?id=" + id + "‘</script>");
    }
}