【问题标题】:How to read a image url from a rss with syndicationFeed?如何使用 syndicationFeed 从 rss 中读取图像 url?
【发布时间】:2011-10-28 12:35:41
【问题描述】:
如何获取图片地址?假设标签是
<media:thumbnail url="http://img.youtube.com/vi/y6_-cLWwEU0/default.jpg" width="120"
height="90" />
在 syndicationFeed 中使用 syndicationItem?
我有这样的事情
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??
【问题讨论】:
标签:
c#
image-processing
syndication
【解决方案1】:
例如,Google RSS 将所有图像保存在一个摘要中。
所以你可以通过这段代码提取它:
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);
}
【解决方案2】:
我也需要一个解决方案,我是这样使用的:
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);
}
我从摘要中提取img;
【解决方案3】:
流流 = 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.
}
}