文章正文：
ASP.Net实例之百度分页程序
后台代码：
namespace search.Modules
{
using System;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
/// <summary>
/// ProductDetail 的摘要说明。
/// </summary>
public class SupplyPage : System.Web.UI.UserControl
{
protected System.Web.UI.WebControls.Repeater ProductList;
protected System.Web.UI.WebControls.Panel Panel1;
protected System.Web.UI.WebControls.Image productImage;
protected System.Web.UI.WebControls.Label lblError;
public int resultCount = 0;
//定义存储过程分页(GetRecordFromPage)
private static string tblName = "infoTotal";
private static string fldName = "add_time";
private static int PageSize = 5;
private static int PageIndex= 1;
private static int OrderType = 1;//0表示升序，非0表示降序
private static string strwhere =string.Empty;//"CategoryId="+int.Parse(Request.QueryString["categoryId"]).ToString(); 不能这样写，要在下面定义一个方法
//分页六个参数.end
private string DivPageString;
private int DivPageIndex;//DivPageIndex 值在分页显示页码的时候用到
private string Keywords = string.Empty;
private string KeywordsURL = string.Empty;
private string URLpara = string.Empty;
private void SetParameter()
{
strwhere = "type="+int.Parse(Request.QueryString["type"]).ToString();
Keywords=Request.QueryString["PreKeyword"];
//地址相同部分的处理，用于分页的地址链接
URLpara = "&type="+
Request.QueryString["type"];
if ( Keywords != null )
{
strwhere = strwhere + " and ((title like '%"+Keywords+"%') or (keywords like '%"+Keywords+"%'))";
KeywordsURL = HttpUtility.UrlEncode(Keywords);
URLpara = URLpara + "&PreKeyword="+
KeywordsURL.ToString();
}
if(Request.QueryString["page"]!=null)
{
PageIndex = Convert.ToInt16(Request.QueryString["page"]);
if ( PageIndex > 1 ){DivPageIndex=1;}
if ( PageIndex > 2 ){DivPageIndex=2;}
if ( PageIndex > 3 ){DivPageIndex=3;}
if ( PageIndex > 4 ){DivPageIndex=4;}
if ( PageIndex > 5 ){DivPageIndex=5;}
if ( PageIndex > 6 ){DivPageIndex=6;}
if ( PageIndex > 7 ){DivPageIndex=7;}
}
else
{
PageIndex = 1;
}
}
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
SetParameter();
if (!Page.IsPostBack)
{
//显示第一页的记录
ShowResult(tblName , fldName ,PageSize , PageIndex , OrderType , strwhere );
}
}
void ShowResult( string tbName ,string fldName , int PageSize , int PageIndex ,int OrderType , string strwhere)
{
//绑定Repeater控件
ProductList.DataSource = BLL.Product.GetProduct(tblName , fldName ,PageSize , PageIndex , OrderType , strwhere );
ProductList.DataBind();
//调用Product类中的方法获得该类商品的总数
resultCount = BLL.Product.GetProductCount(tblName , fldName , strwhere );
Label lblRecord = (Label)this.Page.FindControl("RecordCount");
lblRecord.Text = resultCount.ToString();
int count;
if(resultCount == 0)
{
this.lblError.Visible = true;
this.lblError.Text = "没有查找到相关的数据！";
this.lblError.ForeColor=Color.Red;
this.lblError.Font.Bold = true;
}
//如果查询结果总数是页大小的整数倍
if (resultCount%PageSize == 0)
{
count = resultCount/PageSize;
//PageCount.Text = count.ToString();
}
else
{
count = resultCount/PageSize+1;
//PageCount.Text = count.ToString();
}
//分页显示的控制
DivPageString="共"+count.ToString()+"页 ";
//显示<上一页>
if ( PageIndex > 1 )
{
DivPageString=DivPageString+" <a href=\"search.aspx?page="+
(PageIndex-1).ToString()
+URLpara
+"\">上一页</a>";
}
//显示当前页的面前几页
//
for(int i=PageIndex-DivPageIndex; i<=PageIndex-1; i++)
{
DivPageString=DivPageString+" <a href=\"search.aspx?page="+
i.ToString()
+URLpara
+"\">"+
i.ToString()
+"</a>";
}
//显示当前页
DivPageString=DivPageString+" <font color='#FF0000'>"+PageIndex.ToString()+"</font>";
//显示当前页的后前几页
for(int i=PageIndex+1; i<=PageIndex+7; i++)
{
if(i>count){break;}
DivPageString=DivPageString+" <a href=\"search.aspx?page="+
i.ToString()
+URLpara
+"\">"+
i.ToString()
+"</a>";
}
//显示<下一页>
if( PageIndex < count )
{
DivPageString=DivPageString+" <a href=\"search.aspx?page="+
(PageIndex+1).ToString()
+URLpara
+"\">下一页</a>";
}
//分页显示完成
}
//返回值到容器中
public string strPage //取值
{
get
{
return ReturnPageString();
}
}
private string ReturnPageString() //返值
{
return DivPageString;//
}
#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.Load += new System.EventHandler(this.Page_Load);
//this.ProductList.ItemDataBound += new RepeaterItemEventHandler(ProductList_ItemDataBound);
}
#endregion
private void ProductList_ItemDataBound(object sender,System.Web.UI.WebControls.RepeaterItemEventArgs e)
{
if(e.Item.ItemType == ListItemType.alternatingItem e.Item.ItemType == ListItemType.Item)
{
}
}
}
}
前台代码：
<%@ Control Language="c#" AutoEventWireup="false" Codebehind="SupplyPage.ascx.cs" Inherits="search.Modules.SupplyPage" TargetSchema="http://schemas.microsoft.com/intellisense/ie5"%>
<asp:repeater id="ProductList" runat="server">
<ItemTemplate>
<div class="list">
<!--产品图片插入-->
<!--<img src="temp/aa.gif" class="l-img" />-->
<asp:Image ID="productImage" Runat="server" ImageUrl=<%# DataBinder.Eval(Container.DataItem,"photo")%> CssClass="l-img" Visible=<%#(DataBinder.Eval(Container.DataItem,"photo")!=System.DBNull.Value?true:false)%>></asp:Image>
<ul>
<li class="l-tit"><a href="#"><%# DataBinder.Eval(Container.DataItem,"title").ToString().Length>22?DataBinder.Eval(Container.DataItem,"title").ToString().Substring(0,22).Replace("\n\r","<br>"):DataBinder.Eval(Container.DataItem,"title").ToString().Replace("\n\r","<br>") %></a><span class="l-time"><%# Convert.ToDateTime(DataBinder.Eval(Container.DataItem,"add_time")).ToShortDateString() %></span></li>
<li class="content"><%# DataBinder.Eval(Container.DataItem,"content").ToString().Length>82?DataBinder.Eval(Container.DataItem,"content").ToString().Substring(0,82).Replace("\n\r","<br>"):DataBinder.Eval(Container.DataItem,"content").ToString().Replace("\n\r","<br>") %></li>
<li class="contact"><img src="images/talk.jpg" width="97" height="21" border="0" alt="在线洽谈" />联系人：<%# DataBinder.Eval(Container.DataItem,"real_name").ToString() %> [<a href="#">全部供应信息</a>]</li>
</ul>
</div>
</ItemTemplate>
</asp:repeater>
<asp:Label ID="lblError" Runat="server" Visible="False" Height="120px" Width="500px"></asp:Label>
<!--分页开始-->
<div id="page">
<asp:Panel id="Panel1" runat="server"><%= strPage%></asp:Panel>
</div>
<!--分页结束-->