使用联合从 RSS 提要获取图像？

Question

I am building a Windows Phone app and using SyndicationFeed to read an RSS feed. How do I get the picture from the feed?

Will I need a converter(?), but I don't know what will go in it. I saw there is an ImageUrl property and I tried putting that in use but no joy. :(

The pictures need to be filtered by the category together with the feed (which is predefined). I know how to get the feed filtered (generous forum member helped:) ) just getting images is the problem.

I'm using an MSDN example as a background: http://msdn.microsoft.com/en-us/library/hh487167(v=vs.92).aspx

My feed: http://www.zimo.co/feed/

---

I would use this regex to get the images from the feed:

Regex rg = new Regex(@"<img.*?src=""(.*?)""", RegexOptions.IgnoreCase);

but the problem is how to implement it. so I get the feed and the picture at the same time:(

this is the code I use:

private void UpdateFeedList(string feedXML)
    {
        StringReader stringReader = new StringReader(feedXML);
        XmlReader xmlReader = XmlReader.Create(stringReader);
        SyndicationFeed feed = SyndicationFeed.Load(xmlReader);


Regex rg = new Regex(@"<img.*?src=""(.*?)""", RegexOptions.IgnoreCase);


        Deployment.Current.Dispatcher.BeginInvoke(() =>
        {

ls_text.ItemsSource = feed.Items;


        });
    }

Answer 1

There's nothing in the RSS specification that provides for a singular image that represents the <item> being processed. If you want to have an image, you can try parsing the <content> element and pulling out one or more images from the element contents.

To get the image links out of the source, you're going to need to parse the text to get a match of all <img> tags in the text. You can try to do this in a couple ways. You could try to do a RegEx match of the img tags, or you could try to load the text into an XML document and parse it. The problem is, it's not full HTML, so you might have to modify it a bit (for example, you might have to put an enclosing set of tags around the content, if the content isn't already enclosed by <p> tags.