DataList自定义分页
private void DataListBind()
{
SqlConnection con = new SqlConnection("server=wfserver;database=test;uid =sa;pwd=123;");
SqlDataAdapter sda = new SqlDataAdapter("select * from Employees",con);
DataSet ds= new DataSet();
try
{
sda.Fill(ds,"testTable");
this.lblall.Text = "共 "+Convert.ToString(ds.Tables["testTable"].Rows.Count)+" 条数据";
PagedDataSource objpage = new PagedDataSource();
objpage.DataSource =ds.Tables["testTable"].DefaultView;
objpage.AllowPaging=true;
objpage.PageSize=5;
int CurPage;
if(Request.QueryString["Page"]!=null)
{
CurPage = Convert.ToInt32(Request.QueryString["Page"]);
}
else
{
CurPage = 1;
}
this.lblcurpage.Text = "当前第 "+Convert.ToString(CurPage)+" 页";
objpage.CurrentPageIndex = CurPage -1;
if(!objpage.IsFirstPage)
{
//到上一页
this.Hyperprev.NavigateUrl = Request.CurrentExecutionFilePath+"?Page="+Convert.ToString(CurPage-1);
}
if(!objpage.IsLastPage)
{
//到下一页
this.Hypernext.NavigateUrl = Request.CurrentExecutionFilePath+"?Page="+Convert.ToString(CurPage+1);
}
this.DataList1.DataSource = objpage;
this.DataList1.DataBind();
}
catch(Exception error)
{
Response.Write(error.ToString());
}
}
aspx中的代码：
<asp:datalist id="mydatalist" Runat="server">
<ItemTemplate>
<TABLE id="Table2" cellSpacing="0" cellPadding="0" width="400" border="0">
<TR>
<TD width="15"> </TD>
<TD width="85" height="22"> </TD>
<TD width="211"> </TD>
<TD width="80"> </TD>
</TR>
<TR>
<TD width="15"> </TD>
<TD class="ziti" bgColor="#f7eeef" colSpan="3" height="22">回 复：</TD>
</TR>
<TR>
<TD width="15"></TD>
<TD bgColor="#666666" colSpan="3" height="1"></TD>
</TR>
<TR>
<TD width="15" rowSpan="3"> </TD>
<TD class="ziti" vAlign="top" width="85" rowSpan="3">发贴人姓名<BR>
级别：<BR>
</TD>
<TD class="ziti" vAlign="top" height="22"><IMG height="20" src="images.files/face0.gif" width="20">发表于：<%# DataBinder.Eval(Container.DataItem,"remessage_time") %></TD>
<TD class="brown" width="80">回复</TD>
</TR>
<TR>
<TD colSpan="2" height="5"></TD>
</TR>
<TR>
<TD><%# DataBinder.Eval(Container.DataItem,"remessage_context") %></TD>
<TD width="80"> </TD>
<TD width="4"> </TD>
</TR>
<TR>
<TD width="15"></TD>
<TD bgColor="#666666" colSpan="3" height="1"></TD>
</TR>
</TABLE>
</ItemTemplate>
</asp:datalist>
<TABLE id="Table3" cellSpacing="0" cellPadding="0" width="400" border="0">
<TR>
<TD width="15"> </TD>
<TD class="ziti" colSpan="3" height="22">共有<asp:label id="lblRecordCount" runat="server" ForeColor="red"></asp:label>条记录
当前为<asp:label id="lblCurrentPage" runat="server" ForeColor="red"></asp:label>/<asp:label id="lblPageCount" runat="server" ForeColor="red"></asp:label>页
<asp:linkbutton id="lbnPrevPage"runat="server" Text="上一页" CommandName="prev" ></asp:linkbutton><asp:linkbutton id="lbnNextPage" runat="server" Text="下一页" CommandName="next" >下一页</asp:linkbutton></TD>
<TR>
</table>
CS代码：
using System.Data.SqlClient;
using System.Configuration;
protected System.Web.UI.WebControls.Label lblmcontent;
protected System.Web.UI.WebControls.Label lblmessagetime;
protected System.Web.UI.WebControls.Label lblmkind;
protected System.Web.UI.WebControls.Label lblmauthor;
protected System.Web.UI.WebControls.Label lblmessagetitle;
protected System.Web.UI.WebControls.DataList mydatalist;
protected System.Web.UI.HtmlControls.HtmlForm Form1;
int PageSize,RecordCount,PageCount,CurrentPage;
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.Label lblRecordCount;
protected System.Web.UI.WebControls.LinkButton lbnNextPage;
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 = 2;
SqlConnection con=new SqlConnection();
con.C.AppSettings["ConnectionString"];
SqlCommand cmd=new SqlCommand();
cmd.CommandText="select message_title,message_content,message_content,message_time,message_author from message where message_id= '"+Request.QueryString["id"]+"'";
cmd.C;
con.Open();
if(!Page.IsPostBack)
{
//设定PageSize
SqlDataReader reader=cmd.ExecuteReader();
if(reader.Read())
{
this.lblmauthor.Text=Convert.ToString(reader["message_author"]);
this.lblmcontent.Text=Convert.ToString(reader["message_content"]);
this.lblmessagetime.Text=Convert.ToString(reader["message_time"]);
this.lblmessagetitle.Text=Convert.ToString(reader["message_title"]);
}
reader.Close();
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
//float pagetemp=0;
if((RecordCount%PageSize)==0)
PageCount = (RecordCount/PageSize);
else
PageCount = (RecordCount/PageSize)+1;
lblPageCount.Text = PageCount.ToString();
ViewState["PageCount"] = PageCount;
}
}
//****************************
public int CalculateRecord()
{
int intCount;
SqlConnection recon=new SqlConnection();
recon.C.AppSettings["ConnectionString"];
SqlCommand recmd=new SqlCommand();
recmd.CommandText="select count(*) as co from remessage where remessage_fatherid = '"+Request.QueryString["id"]+"'";
recmd.C;
recon.Open();
SqlDataReader reader1=recmd.ExecuteReader();
if(reader1.Read())
{
intCount = Int32.Parse(reader1["co"].ToString());
}
else
{
intCount = 0;
}
reader1.Close();
return intCount;
}
ICollection CreateSource()
{
int StartIndex;
SqlConnection recon=new SqlConnection();
recon.C.AppSettings["ConnectionString"];
//设定导入的起终地址
StartIndex = CurrentPage*PageSize;
string strSel = "select * from remessage where remessage_fatherid = '"+Request.QueryString["id"]+"'";
DataSet ds = new DataSet();
SqlDataAdapter MyAdapter = new SqlDataAdapter(strSel, recon);
MyAdapter.Fill(ds,StartIndex,PageSize,"remessage");
return ds.Tables["remessage"].DefaultView;
}
public void ListBind()
{
this.mydatalist.DataSource = CreateSource();
this.mydatalist.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();
}
******************************
<%@ Page language="c#" Codebehind="Page.cs" AutoEventWireup="false" Inherits="MikeCat_app2.MikeCat_DataListPage" %>
<HTML>
<HEAD>
<title>欢迎光临</title>
<meta name="GENERATOR" C>
<meta name="CODE_LANGUAGE" C>
<meta name="vs_defaultClientScript" c>
<meta name="vs_targetSchema" chttp://schemas.microsoft.com/intellisense/ie5" target=_blank>http://schemas.microsoft.com/intellisense/ie5">
<STYLE>
TD { FONT-SIZE: 12px }
.font { FONT-SIZE: 12px }
</STYLE>
</HEAD>
<body MS_POSITI>
<form id="form1" runat="server">
<asp:Label id="Label5" runat="server" Font-Bold="True" style="LEFT: 184px; POSITION: absolute; TOP: 24px">DATALIST分页</asp:Label>
<asp:datalist id="dList" Runat="server" HeaderStyle-BackColor="SteelBlue" Width="100%" EnableViewState="False"
style="LEFT: 8px; POSITION: absolute; TOP: 64px">
<HeaderTemplate>
<TABLE cellSpacing="0" cellPadding="0" width="100%">
<TR>
<TD align="left">
<FONT color="#ffffff">BLOGID</FONT></TD>
<TD align="left">
<FONT color="#ffffff">日志标题</FONT></TD>
<TD align="left">
<FONT color="#ffffff">日志内容</FONT></TD>
</TR>
</HeaderTemplate>
<FooterTemplate>
</TABLE>
</FooterTemplate>
<ItemTemplate>
<tr>
<td><%# DataBinder.Eval(Container.DataItem, "blogid") %></td>
<td><%# DataBinder.Eval(Container.DataItem, "日志标题") %></td>
<td><%# DataBinder.Eval(Container.DataItem, "日志内容") %></td>
</tr>
</ItemTemplate>
</asp:datalist><font>
<asp:Panel id="Panel1" runat="server" Width="552px" Height="48px" style="LEFT: 160px; POSITION: absolute; TOP: 288px"
CssClass="font">
<asp:linkbutton id="fp1" runat="server" CommandName="first">首页</asp:linkbutton>
<asp:linkbutton id="pp1" runat="server" CommandName="prev">上一页</asp:linkbutton>
<asp:linkbutton id="np1" runat="server" CommandName="next">下一页</asp:linkbutton>
<asp:linkbutton id="lp1" runat="server" CommandName="last">尾页</asp:linkbutton>
<asp:label id="Label1" runat="server">页次</asp:label>
<asp:Label id="cp1" runat="server"></asp:Label>
<asp:label id="Label2" runat="server">/</asp:label>
<asp:Label id="pc1" runat="server"></asp:Label>
<asp:label id="Label3" runat="server">每页记录数</asp:label>
<asp:Label id="rc1" runat="server"></asp:Label>
<asp:Label id="Label4" runat="server">选择跳转页码</asp:Label>
<asp:DropDownList id="jp1" runat="server" AutoPostBack="True"></asp:DropDownList>
</asp:Panel></font></form>
</body>
</HTML>
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.OleDb;
namespace MikeCat_app2
{
/// <summary>
/// MikeCat_DataListPage 的摘要说明。
/// *****************************************
/// 功能：DataList数据分页
/// *****************************************
/// </summary>
public class MikeCat_DataListPage : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataList dList;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.Label Label2;
protected System.Web.UI.WebControls.Label Label3;
protected System.Web.UI.WebControls.LinkButton pp1;
protected System.Web.UI.WebControls.LinkButton lp1;
protected System.Web.UI.WebControls.LinkButton np1;
protected System.Web.UI.WebControls.LinkButton fp1;
int PageSize,RecordCount,PageCount,CurrentPage;
protected System.Web.UI.WebControls.Panel Panel1;
protected System.Web.UI.WebControls.Label pc1;
protected System.Web.UI.WebControls.Label rc1;
protected System.Web.UI.WebControls.Label cp1;
protected System.Web.UI.WebControls.Label Label4;
protected System.Web.UI.WebControls.DropDownList jp1;
protected System.Web.UI.WebControls.Label Label5;
OleDbConnection conn;
private void Page_Load(object sender, System.EventArgs e)
{
PageSize = 10;
string connstr = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source="+Server.MapPath(".")+"\\northwind.mdb;";
conn = new OleDbConnection(connstr);
rc1.Text=PageSize.ToString();
CurrentPage=0;
RecordCount=this.GetRecordCount();
PageCount = (RecordCount%PageSize)>0?(RecordCount/PageSize)+1:(RecordCount/PageSize);
pc1.Text=PageCount.ToString();
ArrayList al=new ArrayList();
for(int i=1;i<PageCount+1;i++)
{
al.Add(i);
}
if(!Page.IsPostBack)
{
jp1.DataSource=al;
jp1.DataBind();
mfbind();
}
}
public int GetRecordCount()
{
conn.Open();
OleDbCommand cmd=new OleDbCommand("select count(*) as cnt from mfblog",conn);
int intCount=int.Parse(cmd.ExecuteScalar().ToString());
cmd.Dispose();
conn.Close();
return intCount;
}
private IList DataSource()
{
int StartIndex;
StartIndex = CurrentPage*PageSize;
string strSql = "select * from mfblog";
DataSet ds = new DataSet();
OleDbDataAdapter da = new OleDbDataAdapter(strSql,conn);
da.Fill(ds,StartIndex,PageSize,"mfblog");
return ds.Tables["mfblog"].DefaultView;
}
private void mfbind()
{
dList.DataSource=(DataView)DataSource();
dList.DataBind();
np1.Enabled = true;
pp1.Enabled = true;
if(CurrentPage==(PageCount-1)) np1.Enabled = false;
if(CurrentPage==0) pp1.Enabled = false;
cp1.Text = (CurrentPage+1).ToString();
}
public void Page_OnClick(Object sender,CommandEventArgs e)
{
CurrentPage =int.Parse(cp1.Text.Trim())-1;
PageCount =int.Parse(pc1.Text.Trim());
string cnstr = e.CommandName;
switch(cnstr)
{
case "first":
CurrentPage=0;
break;
case "next":
if(CurrentPage<(PageCount-1)) CurrentPage++;
break;
case "prev":
if(CurrentPage>0) CurrentPage--;
break;
case "last":
CurrentPage=PageCount-1;
break;
}
mfbind();
}
#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.fp1.Command += new System.Web.UI.WebControls.CommandEventHandler(this.Page_OnClick);
this.pp1.Command += new System.Web.UI.WebControls.CommandEventHandler(this.Page_OnClick);
this.np1.Command += new System.Web.UI.WebControls.CommandEventHandler(this.Page_OnClick);
this.lp1.Command += new System.Web.UI.WebControls.CommandEventHandler(this.Page_OnClick);
this.jp1.SelectedIndexChanged += new System.EventHandler(this.jp1_SelectedIndexChanged);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void jp1_SelectedIndexChanged(object sender, System.EventArgs e)
{
CurrentPage=int.Parse(jp1.SelectedItem.Text.Trim())-1;
mfbind();
}
}
}
