asp.net 文章内容分页显示的代码

 更新时间:2009年01月07日 23:18:25   作者:   我要评论

有种文章分页的思路是用截取文本字符数的方法来处理,这个方法当文章内容是html代码的话,分页后会引起排版问题。
aspx:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ArticlePage.aspx.cs" Inherits="ArticlePage" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>文章分页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<table style="text-align: center;" border="0" cellpadding="0" cellspacing="0">
<tr>
<td align="left" style="width: 400px; background-color: #ffff99;">
<table style="width: 100%">
<tr>
<td style="width: 100%; border-top: #ff3300 2px dotted; border-left-width: 2px; border-left-color: #ff3300; border-bottom: #ff3300 2px dotted; border-right-width: 2px; border-right-color: #ff3300; height: 25px; text-align: center;">
<%=ArticleTitle %></td>
</tr>
</table>
</td>
</tr>
<tr>
<td style="width: 400px; height: 100%;" align="left">
<p style="background-color: oldlace">
<%=Article %>
</p>
</td>
</tr>
<tr>
<td style="width: 400px; background-color: #ffff99; height: 48px;">
<table style="width: 100%">
<tr>
<td style="width: 100%; border-top: #ff3300 2px dotted; border-left-width: 2px; border-left-color: #ff3300; border-bottom: #ff3300 2px dotted; border-right-width: 2px; border-right-color: #ff3300;" align="left">
<p>
<asp:HyperLink ID="firstLink" runat="server" Visible="False">首页</asp:HyperLink>
<asp:HyperLink ID="preLink" runat="server" Visible="False">上一页</asp:HyperLink>
<asp:HyperLink ID="nextLink" runat="server" Visible="False">下一页</asp:HyperLink>
<asp:HyperLink ID="lastLink" runat="server" Visible="False">末页</asp:HyperLink>
</p>
<p>
<%
if(pageSum>1)
{
for (int i = 1; i <= pageSum; i++)
{
if (pageNo == i)
{
%>
<%=i%>
<%
}
else
{
%>
<a href="?page=<%=i %>"><%=i%></a>
<%
}
}
}
%>
页数:<%=pageNo %>/<%=pageSum %>
</p></td>
</tr>
</table>
</td>
</tr>
</table>
<br />
</div>
</form>
</body>
</html>
//==========================
aspx.cs:
(C#)
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class ArticlePage : System.Web.UI.Page
{
protected string Article = "", ArticleTitle="";
protected int pageNo = 1, pageSum = 1;
protected void Page_Load(object sender, EventArgs e)
{
//实际应用中,此处的数据通过操作数据库来获取
ArticleTitle = "文章标题";
string filename = "20091795819.html";
string mPath = Server.MapPath("h3g/");
string filepath = mPath + filename;
ShowArticle(filepath);
}
protected void ShowArticle(string filepath)
{
string page = Request.Params["page"];
int perPageLine = 5;//每页行数
ArrayList al = fileOpr.ReadFileContentToArrayList(filepath);//按行读取文件内空到数组中
int contentLine = al.Count;
pageSum = (int)System.Math.Ceiling((double)contentLine / perPageLine);//总页数,进1取整
if (page == null || page == "" || page == "1")
{
pageNo = 1;
if (contentLine <= perPageLine)
{
for (int i = 0; i < contentLine; i++)
{
Article += al[i].ToString();
}
}
else
{
for (int i = 0; i < perPageLine; i++)
{
Article += al[i].ToString();
}
firstLink.Visible = false;
preLink.Visible = false;
nextLink.NavigateUrl = "?page=" + (pageNo + 1);
nextLink.Visible = true;
lastLink.NavigateUrl = "?page=" + pageSum;
lastLink.Visible = true;
}
}
else
{
pageNo = int.Parse(page);
if (pageNo < pageSum)
{
for (int i = perPageLine * (pageNo - 1); i < perPageLine * pageNo; i++)
{
Article += al[i].ToString();
}
firstLink.NavigateUrl = "?page=1";
firstLink.Visible = true;
preLink.NavigateUrl = "?page=" + (pageNo - 1);
preLink.Visible = true;
nextLink.NavigateUrl = "?page=" + (pageNo + 1);
nextLink.Visible = true;
lastLink.NavigateUrl = "?page=" + pageSum;
lastLink.Visible = true;
}
else
{
for (int i = contentLine - perPageLine * (pageSum - 1); i < contentLine; i++)
{
Article += al[i].ToString();
}
firstLink.NavigateUrl = "?page=1";
firstLink.Visible = true;
preLink.NavigateUrl = "?page=" + (pageNo - 1);
preLink.Visible = true;
nextLink.Visible = false;
lastLink.Visible = false;
}
}
}
}
重用类fileOpr.cs:
fileOpr.ReadFileContentToArrayList(filepath);中的方法:
public static ArrayList ReadFileContentToArrayList(string filepath)
{
ArrayList al = new ArrayList();
FileStream fs = new FileStream(filepath, FileMode.Open, FileAccess.Read);
StreamReader srd = new StreamReader(fs, Encoding.Default);
//使用StreamReader类来读取文件
srd.BaseStream.Seek(0, SeekOrigin.Begin);
string strLine = srd.ReadLine();
while (strLine != null)
{
strLine = srd.ReadLine();
al.Add(strLine + "\n");
}
//关闭此StreamReader对象
srd.Close();
fs.Dispose();
fs.Close();
return al;
}
注:有种文章分页的思路是用截取文本字符数的方法来处理,这个方法当文章内容是html代码的话,分页后会引起排版问题。
上面代码的方法思路是按行数来处理,这个方法个人认为相对更好些。在后台管理文章内容文件时,保证html代码的良好排版换行即可。

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