使用DataList实现分页的例子

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使用DataList实现分页的例子
发布时间：2007-09-19 23:47:58 浏览数：6262 发布者：abcdef133 设置字体【大中小】

数据表名称为：guest
包括字段：id(int)，name(varchar)，face(varchar)，sex(varchar)，caption(varchar)，postdate(datetime)，content(text)，homepage(varchar)，ip(varchar)，qq(varchar)，email(varchar)

<body MS_POSITIONING="GridLayout">
<form method="post" action="default.aspx" runat="server" ID="Form1">
<table width="100%" border="0" cellpadding="2" cellspacing="0" align="center">
<tr>
<td align="center">
<asp:DataList ID="Myguest" RepeatColumns="1" Runat="server">
<ItemTemplate>
<table class="gueststyleline" border="0" cellpadding="0" cellspacing="1" align="center"
width="610">
<tr>
<td>
<table class="gueststyleline" border="0" cellpadding="0" cellspacing="1" align="center"
width="610">
<tr>
<td>
<table width="100%" border="0" cellpadding="6" cellspacing="0" class="gueststylebg" align="center">
<tr>
<td width="112" align="center" height="153" valign="top">
<table width="100%" border="0" cellspacing="0" cellpadding="0" height="100%" class="gueststylebg">
<tr>
<td>
<table border="0" cellspacing="0" cellpadding="0" align="center" height="25">
<tr>
<td class="FILTER">
<div align="center"><font style="LEFT: 0px; WIDTH: 100%; WORD-WRAP: break-word; 130; 0pt"><%# DataBinder.Eval(Container.DataItem,"name") %></font></div>
</td>
</tr>
</table>
<div align="center"><font style="LEFT: 0px; WIDTH: 100%; WORD-WRAP: break-word; 130; 0pt"><%#"<img src=\""+ DataBinder.Eval(Container.DataItem,"face")+ "\" width=\"80\" height=\"90\" align=\"middle\">"%></font><br>
<br>
★
<%# DataBinder.Eval(Container.DataItem,"sex") %>
★</div>
</td>
</tr>
</table>
</td>
<td align="center" height="153" width="2">
<table class="gueststyleline" width="1" height="100%" border="0" cellpadding="0" cellspacing="0">
<tr>
<td width="1"></td>
</tr>
</table>
</td>
<td height="33" valign="top" width="463">
<table width="100%" border="0" cellspacing="0" cellpadding="0" class="gueststylebg" style="TABLE-LAYOUT: fixed"
height="20">
<tr>
<td height="14" width="310"><img src="webimages/icon/subject.gif" width="15" height="15" alt="主题">:<%# DataBinder.Eval(Container.DataItem,"caption") %><br>
</td>
<td width="151" height="14"><font style="0pt"> <img src="webimages/icon/posttime.gif" width="16" height="15" alt="发表时间[北京时间]">:<%# DataBinder.Eval(Container.DataItem,"postdate") %></font></td>
</tr>
</table>
<hr class="gueststylehr" size="0.1" width="100%">
<table width="100%" border="0" cellpadding="5" cellspacing="0" class="gueststylebg" height="45%"
style="TABLE-LAYOUT: fixed">
<tr>
<td valign="top" width="28" align="center"><img src="webimages/emot/1.gif" width="16" height="16">
</td>
<td valign="top" width="94%" style="LEFT: 0px; WIDTH: 100%; WORD-WRAP: break-word; 130; 0pt">
<%# DataBinder.Eval(Container.DataItem,"content") %>
</td>
</tr>
</table>
<table width="100%" border="0" cellpadding="4" cellspacing="0">
<tr>
<td valign="top">
<hr class="gueststylehr" size="0.1" width="100%">
<%#"<a href=\""+ DataBinder.Eval(Container.DataItem,"homepage")+" \" target=\"_blank\"><img src=\"webimages/icon/home.gif\" width=\"44\" height=\"16\" border=\"0\"></a>"%>

<%#"<a target=\"_blank\" href=\"http://www.chinagz.net/ip/ipsearch.cgi?ip="+DataBinder.Eval(Container.DataItem,"ip")+"\"><img src=\"webimages/icon/ip.gif\" align=\"absmiddle\" height=\"16\" border=\"0\"></a>"%>

<%#"<a href=\"http://search.tencent.com/cgi-bin/friend/user_show_info?ln="+DataBinder.Eval(Container.DataItem,"qq") +"\" target=\"_blank\"><img src=\"webimages/icon/qq.gif\" border=\"0\" width=\"35\" height=\"16\"></a>"%>

<%# "<a href=\"mailto:"+DataBinder.Eval(Container.DataItem,"email")+"\"><img src=\"webimages/icon/email.gif\" width=\"42\" height=\"16\" border=\"0\"></a>"%>
<a href="#"><img src="webimages/icon/postguest.gif" width="45" height="16" border="0"></a>
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</ItemTemplate>
</asp:DataList>
<BR>
</td>
</tr>
</table>
<table width="100%" border="0" cellspacing="0" cellpadding="2" align="center" height="9">
<TBODY>
<tr>
<td align="center">
<table class="gueststyleline" width="610" border="0" cellpadding="1" cellspacing="0" height="18">
<tr>
<td height="24">
<table width="100%" border="0" cellspacing="0" cellpadding="0" class="gueststylebg" height="18">
<tr>
<td width="35%" align="center" height="36">
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
</td>
<td align="center" height="36">
<asp:LinkButton id="lbnPrevPage" Text="上一页" CommandName="prev" runat="server" />
<asp:LinkButton id="lbnNextPage" Text="下一页" CommandName="next" runat="server" />
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</TBODY>
</table>
</form>
</body>

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

namespace CrystalReport
{
/// <summary>
/// _default 的摘要说明。
/// </summary>
public class _default : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataList Myguest;
protected System.Web.UI.WebControls.Label lblRecordCount;
protected System.Web.UI.WebControls.Label lblCurrentPage;
protected System.Web.UI.WebControls.Label lblPageCount;
protected System.Web.UI.WebControls.LinkButton lbnPrevPage;
protected System.Web.UI.WebControls.LinkButton lbnNextPage;
protected int PageSize;
protected int CurrentPage;
protected int RecordCount;
protected int PageCount;

private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
PageSize=5;
if(!Page.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
if(RecordCount/PageSize==0)
{
PageCount = RecordCount/PageSize;
}
else
{
PageCount = RecordCount/PageSize+1;
}
lblPageCount.Text = PageCount.ToString();
ViewState["PageCount"] = PageCount;
}

}

#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.lbnPrevPage.Click += new System.EventHandler(this.Page_OnClick);
this.lbnNextPage.Click += new System.EventHandler(this.Page_OnClick);
this.Load += new System.EventHandler(this.Page_Load);

}
#endregion

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

ICollection CreateSource()
{
SqlConnection Conn= new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["ConnString"]);
Conn.Open();
int StartIndex;
//设定导入的起终地址
StartIndex = CurrentPage*PageSize;
string strSel = "Select * from guest order by postdate desc";
DataSet ds = new DataSet();
SqlDataAdapter MyAdapter = new SqlDataAdapter(strSel,Conn);
MyAdapter.Fill(ds,StartIndex,PageSize,"guest");
return ds.Tables["guest"].DefaultView;
}

public void ListBind()
{
Myguest.DataSource = CreateSource();
Myguest.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();
}

private void lbnPrevPage_Click(object sender, System.EventArgs e)
{

}

private void lbnNextPage_Click(object sender, System.EventArgs e)
{

}

private void Page_OnClick(object sender, System.EventArgs e)
{

CurrentPage = (int)ViewState["PageIndex"];
PageCount = (int)ViewState["PageCount"];
string cmd =((LinkButton)sender).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();
}

}
}

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使用DataList实现分页的例子

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