C#中RSS feed中的DateTime解析异常

Question

我正在尝试使用SyndicationFeedFormatter和SyndicationFeed对象解析Rss2,Atom提要.但是我在解析DateTime字段时得到了XmlExceptions,比如pubDate和/或lastBuildDate.

2010年2月24日星期三18:56:04 GMT + 00:00不起作用

2010年2月24日星期三18:56:04 GMT工作

因此,由于时区字段,它正在投掷.

作为一种解决方法,对于熟悉的提要,我会手动修复这些DateTime节点 - 通过捕获XmlException,将Rss加载到XmlDocument中,修复这些节点的值,创建一个新的XmlReader,然后从这个新的XmlReader对象返回格式化程序(代码不是示出).但是对于这种工作方法,我需要事先知道哪些节点导致异常.

        SyndicationFeedFormatter syndicationFeedFormatter = null;
        XmlReaderSettings settings = new XmlReaderSettings();
        using (XmlReader reader = XmlReader.Create(url, settings))
        {
            try
            {
                syndicationFeedFormatter = SyndicationFormatterFactory.CreateFeedFormatter(reader);
                syndicationFeedFormatter.ReadFrom(reader);
            }
            catch (XmlException xexp)
            {
                // fix those datetime nodes with exceptions and read again.
            }
        return syndicationFeedFormatter;
    }

rss feed:http://news.google.com/news？pz = 1&cf = all&aned = us&hl = en&q = test&cf = all&output = rss

例外情况:

第1行中的XmlException错误376.解析XML中的DateTime值时遇到错误.
在System.ServiceModel.Syndication.Rss20FeedFormatter.DateFromString(String dateTimeString,XmlReader reader)
的System.ServiceModel.Syndication.Rss20FeedFormatter.ReadXml(XmlReader reader,SyndicationFeed result)at System.ServiceModel.Syndication.Rss20FeedFormatter.ReadFrom(XmlReader reader)at. .. cs:171行

<rss version="2.0">
  <channel>
    ...
    <pubDate>Wed, 24 Feb 2010 18:56:04 GMT+00:00</pubDate>
    <lastBuildDate>Wed, 24 Feb 2010 18:56:04 GMT+00:00</lastBuildDate> <-----exception
    ...
    <item>
      ...
      <pubDate>Wed, 24 Feb 2010 16:17:50 GMT+00:00</pubDate>
      <lastBuildDate>Wed, 24 Feb 2010 18:56:04 GMT+00:00</lastBuildDate>
    </item>
    ...
  </channel>
</rss>

有没有更好的方法来实现这一目标？请帮忙.谢谢.

Answer 1

以下是我阅读Google新闻RSS源的hacky解决方法.

string xml;
using (WebClient webClient = new WebClient())
{
    xml = Encoding.UTF8.GetString(webClient.DownloadData(url));
}
xml = xml.Replace("+00:00", "");
byte[] bytes = System.Text.UTF8Encoding.ASCII.GetBytes(xml);  
XmlReader reader = XmlReader.Create(new MemoryStream(bytes));
SyndicationFeed feed = SyndicationFeed.Load(reader);