Question

我正在使用RSS.NET for .NET 2.0。尽我所能，我得到以下0个频道：

feed = RssFeed.Read("http://feeds.feedburner.com/punchfire?format=xml");

我注意到，对于其他饲料，例如。

feed = RssFeed.Read("http://www.engadget.com/rss.xml");

我想它必须是有效的 xml 文档。您认为我应该在我的应用程序代码中检查“.xml”，还是有任何方法可以将 RSS.NET 调整为接受 feedburner Feed？

Answer 1

您无法获得任何通道节点的原因是，原子格式没有任何通道节点。检查以下

的 The Atom Syndication Format

您的第二个链接是Rss Feed，其中包含如下通道节点

<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd"> <channel> <title>Engadget</title> <link>http://www.engadget.com</link> . . .

另一方面，原子提要不使用通道节点，您可以通过以下规范链接了解。

<?xml version="1.0" encoding="utf-8"?> <feed xmlns="http://www.w3.org/2005/Atom"> <title type="text">dive into mark</title> <subtitle type="html"> A <em>lot</em> of effort went into making this effortless </subtitle> <updated>2005-07-31T12:29:29Z</updated> <id>tag:example.org,2003:3</id> <link rel="alternate" type="text/html" hreflang="en" href="http://example.org/"/> <link rel="self" type="application/atom+xml" href="http://example.org/feed.atom"/> <rights>Copyright (c) 2003, Mark Pilgrim</rights> <generator uri="http://www.example.com/" version="1.0"> Example Toolkit </generator> <entry> . . .

编辑：检查供稿格式

// url of the feed string utlToload = @"http://feeds.feedburner.com/punchfire?format=xml" // load feed Argotic.Syndication.GenericSyndicationFeed feed = Argotic.Syndication.GenericSyndicationFeed.Create(new Uri(urlToLoad)); // check what format is it if (feed.Format.Equals(SyndicationContentFormat.Rss)) { // yourlogic here } else if (feed.Format.Equals(SyndicationContentFormat.Atom)) { // yourlogic here } else if (feed.Format.Equals(SyndicationContentFormat.NewsML)) { // yourlogic here }

希望有所帮助

Answer 2

使用.Net 3.5+，解析Atom提要非常容易。 BTW Atom提要是我听到的RSS的新标准。

public class RssFeedDO
{
    public string RssFeedUrl { get; private set; }

    /// <summary>
    /// Build feed processor
    /// </summary>
    /// <param name="feedUrl">Atom or RSS url with http in front.</param>
    public RssFeedDO(string feedUrl)
    {
        this.RssFeedUrl = feedUrl;
    }

    /// <summary>
    /// Will try to get RSS data from url passed in constructor. Can do atom or rss
    /// </summary>
    /// <returns></returns>
    public SyndicationFeed GetRSSData()
    {
        SyndicationFeed feed = null;

        XmlReaderSettings settings = new XmlReaderSettings();
        settings.IgnoreWhitespace = true;
        settings.CheckCharacters = true;
        settings.CloseInput = true;
        settings.IgnoreComments = true;
        settings.IgnoreProcessingInstructions = true;
        settings.DtdProcessing = DtdProcessing.Prohibit;

        if (!string.IsNullOrEmpty(this.RssFeedUrl))
        {
            using (XmlReader reader = XmlReader.Create(this.RssFeedUrl, settings))
            {
                SyndicationFeedFormatter GenericFeedFormatter = null;
                Atom10FeedFormatter atom = new Atom10FeedFormatter();
                Rss20FeedFormatter rss = new Rss20FeedFormatter();

                if (reader.ReadState == ReadState.Initial)
                {
                    reader.MoveToContent();
                }
                // try either atom or rss reading
                if (atom.CanRead(reader))
                {
                    GenericFeedFormatter = atom;
                }
                if (rss.CanRead(reader))
                {
                    GenericFeedFormatter = rss;
                }
                if (GenericFeedFormatter == null)
                {
                    return null;
                }
                GenericFeedFormatter.ReadFrom(reader);
                feed = GenericFeedFormatter.Feed;
            }
        }
        return feed;
    }
}

现在你可以将一个对象数据源指向上面的类，然后像你这样在ListView或RadGrid中评估一些东西：

<%# Eval("Title.Text") %>

使用几个feedburner Feed进行测试，效果很好。

Answer 3

我已经改进了JamesR的code，现在返回成功布尔值并接受ByRef syndicationfeed对象;

public static class FeedParser
{
    public static bool Parse(string url, ref SyndicationFeed feed)
    {
        XmlReaderSettings settings = new XmlReaderSettings();
        settings.IgnoreWhitespace = true;
        settings.CheckCharacters = true;
        settings.CloseInput = true;
        settings.IgnoreComments = true;
        settings.IgnoreProcessingInstructions = true;
        settings.DtdProcessing = DtdProcessing.Prohibit;

        if (string.IsNullOrEmpty(url)) return false;

        using (XmlReader reader = XmlReader.Create(url, settings))
        {
            SyndicationFeedFormatter formatter = null;
            Atom10FeedFormatter atom_formatter = new Atom10FeedFormatter();
            Rss20FeedFormatter rss_formatter = new Rss20FeedFormatter();

            if (reader.ReadState == ReadState.Initial) reader.MoveToContent();

            if (atom_formatter.CanRead(reader)) formatter = atom_formatter;
            if (rss_formatter.CanRead(reader)) formatter = rss_formatter;
            if (formatter == null) return false;

            formatter.ReadFrom(reader);
            feed = formatter.Feed;

            return true;
        }
    }        
}

可以像;

一样使用

    SyndicationFeed feed=null;

    if(FeedParser.Parse(url,ref feed))
    {

    }

Answer 4

http://feeds.feedburner.com/punchfire?format=xml似乎是Atom Feed，而不是RSS。 rss.net知道如何处理吗？

RSS.NET无法解析feedburner提要

4 个答案: