利用Argotic Syndication Framework写了一个抓取Rss的例子.

在CodePlex上面找到这个,下载后,安装,然后在自己的东东里面引用一下.很方便的.

例子是,抓取给予的地址的rss内容,可能是多条,然后全部放一起进行排序后,取出前N条,利用GridView显示出来.

1.Default.aspx页面:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Web2._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<title>Untitled Page</title>

</head>

<body>

<div>

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">

<asp:HyperLinkField HeaderText="标题" DataTextField="title" DataNavigateUrlFields="link" />

<asp:BoundField DataField="description" HeaderText="概述" />

<asp:BoundField DataField="author" HeaderText="作者" />

<asp:BoundField DataField="date" HeaderText="日期"/>

</Columns>

</asp:GridView>

</div>

</form>

</body>

</html>

2.Default.aspx.cs页面:

using System;

using System.Collections;

using System.Collections.Generic;

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;

using Argotic.Common;

using Argotic.Syndication;

namespace Web2

{

public partial class _Default : System.Web.UI.Page

{

DataTable table = new DataTable();

protected void Page_Load(object sender, EventArgs e)

{

table.Columns.Add(new DataColumn("title"));

table.Columns.Add(new DataColumn("description"));

table.Columns.Add(new DataColumn("author"));

table.Columns.Add(new DataColumn("date"));

table.Columns.Add(new DataColumn("link"));

int counter = 3; //抓取的条数,此时,最终要显示的条数必须等于或小于每个地址抓取的条数,否则可能不一定是按全部时间排序后的结果.

//添加两条地址,抓取Rss记录.

List<Uri> feedUrls = new List<Uri>();

feedUrls.Add(new Uri("http://www.cnblogs.com/davidluozw/CommentsRSS.aspx"));

feedUrls.Add(new Uri("http://feed.yulu.info"));

IEnumerator em = feedUrls.GetEnumerator();

while (em.MoveNext())

{

RssFeed feed = RssFeed.Create((Uri)em.Current);

table.Merge(catchRss(feed, counter));

}

//对已经按所有地址抓取的所有记录混到一起,然后按时间排序,取前counter条.

DataRow[] rows = table.Select("","date desc");

DataTable tempTable = table.Clone();

tempTable.Rows.Clear();

foreach (DataRow row in rows)

{

tempTable.ImportRow(row);

if (--counter==0)

{

break;

}

table = tempTable;

//将排序后的结果作为数据源绑定给GridView,显示.

GridView1.DataSource = table;

GridView1.DataBind();

}

public DataTable catchRss(RssFeed feed,int counter) {

//收取Rss.

//SyndicationResourceLoadSettings settings = new SyndicationResourceLoadSettings();

//settings.RetrievalLimit = 10;

DataTable rtnTable = table.Clone();

rtnTable.Rows.Clear();

foreach (RssItem item in feed.Channel.Items) //遍历此feed中的每一项.

{

rtnTable.Rows.Add(item.Title,item.Description,item.Author,item.PublicationDate.ToShortDateString(),item.Link.ToString());

if (--counter==0)

{

break;

}

return rtnTable;

}

就这样!!

posted @ 2008-11-07 15:01 小牛大牛阅读(776) 评论(1) 收藏举报

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利用Argotic Syndication Framework写了一个抓取Rss的例子.

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