如何使用syndicationFeed从rss中读取图像url？

Question

如何获取图像url？假设标记是

<media:thumbnail url="http://img.youtube.com/vi/y6\_-cLWwEU0/default.jpg" width="120" height="90" />

在syndicationItem中使用syndicationFeed？

我有这样的东西

 Stream stream = e.Result;
                    XmlReader response = XmlReader.Create(stream);
                    SyndicationFeed feeds = SyndicationFeed.Load(response);
                    foreach (SyndicationItem ff in feeds.Items)
                    {

                        RssItem rssItem = new RssItem(ff.Title.Text, ff.Summary.Text, ff.PublishDate.ToString(), ff.Links[0].Uri.AbsoluteUri, **ff.image?????** );
                        rssItems.Add(rssItem);
                    }

有什么帮助吗？

Answer 1

例如，Google将所有图像保存在一个总结中。

因此，您可以通过以下代码提取它：

List<RssFeedItem> rssItems = new List<RssFeedItem>();
                    Stream stream = e.Result;
                    XmlReader response = XmlReader.Create(stream);
                    SyndicationFeed feeds = SyndicationFeed.Load(response);
                    foreach (SyndicationItem f in feeds.Items)
                    {
                        RssFeedItem rssItem = new RssFeedItem();

                        rssItem.Description = f.Summary.Text;

 const string rx =  @"(?<=img\s+src\=[\x27\x22])(?<Url>[^\x27\x22]*)(?=[\x27\x22])"; 
                        foreach (Match m in Regex.Matches(f.Summary.Text, rx, RegexOptions.IgnoreCase | RegexOptions.Multiline))
                        {
                            string src = m.Groups[1].Value;
                            if (src.StartsWith("//")) // Google RSS has it
                            {
                                src = src.Replace("//", "http://");
                            }

                            rssItem.ImageLinks.Add(src);
                        }

Answer 2

我也需要一个解决方案，我用了这样的方法：

foreach (SyndicationItem item in feed.Items)
{
   int s,f;
        s = item.Summary.Text.IndexOf("<");
        f = item.Summary.Text.IndexOf("/>");

        if (f != -1)
            div1.InnerHtml += "</br>photo:" + item.Summary.Text.Substring(s, f + 1 - s);
}

我从总结中提取img；

Answer 3

溪流= e.Result；

        XmlReader response = XmlReader.Create(stream);

        SyndicationFeed feeds = SyndicationFeed.Load(response);

        foreach (SyndicationItem item in feeds.Items)
        {
            if (item.ElementExtensions.Where(p => p.OuterName == "thumbnail").Count() != 0)
            {
                string imgPath = item.ElementExtensions.Where(p => p.OuterName == "thumbnail").First().GetObject<XElement>().Attribute("url").Value;
                MessageBox.Show(imgPath); //use it to show the img in DIV or whereever you wish.
            }

        }