RSS源问题 [英] Problem with RSS Feeds

问题描述

你好，

我正在尝试使用Windows Phone App Studio为我的techblog创建一个应用程序。实际上它是一个RSS阅读器。我试图创建那个阅读器，但在手机上它没有显示整篇文章 - 只是前4-5行，然后是"[...]"。显示微软新闻的
默认RSS源似乎工作正常（你可以阅读整篇文章）。你知道我能解决这个问题吗？
帖子是希腊文...

I'm trying to create an app for my techblog, using Windows Phone App Studio of course. Actually it's an RSS reader. I tried to create that reader but on the phone it doesn't show the whole article - just the first 4-5 lines and then "[...]". The default RSS feed that shows Microsofts news seems to work fine (you can read the whole post). Do you know if I can fix this problem? Posts are in Greek...

推荐答案

我想你必须手动编辑正在显示的文本格式

I guess you have to manually edit the format of text being displayed

希望这段代码能帮助..

Hope this code helps..

class Class1
    {
        public ObservableCollection<RSSItem> FeedItems = new ObservableCollection<RSSItem>();
        
        void method1()
        {
            WebClient wc = new WebClient();
            wc.DownloadStringCompleted += wc_DownloadStringCompleted;
            wc.DownloadStringAsync(new Uri(_feedUrl), UriKind.Absolute);
        }

        private void wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
        {
            try
            {
                XmlReader reader = XmlReader.Create(GenerateStreamFromString(e.Result));
                SyndicationFeed rssFeed = SyndicationFeed.Load(reader);
                var items = from p in rssFeed.Items
                            select new RSSItem
                            {
                                Title = p.Title.Text,
                                Summary = FormatSummary(p).Trim(),
                                Permalink = (p.Links.FirstOrDefault() != null) ? p.Links.FirstOrDefault().GetAbsoluteUri() : null,
                                PublishDate = p.PublishDate.LocalDateTime.ToString(),
                                ImageUrl = UpdateFeedImageUrl(p)
                            };
                FeedItems = items.ToList();
            }
            catch (Exception ex)
            {
            }
        }

        public Stream GenerateStreamFromString(string s)
        {
            MemoryStream stream = new MemoryStream();
            StreamWriter writer = new StreamWriter(stream);
            writer.Write(s);
            writer.Flush();
            stream.Position = 0;
            return stream;
        }

        /// <summary>
        /// Trim the html tags
        /// </summary>
        /// <param name="p"></param>
        /// <returns></returns>
        private string FormatSummary(SyndicationItem p)
        {
            const string HTML_TAG_PATTERN = "<.*?>";
            if (!String.IsNullOrEmpty(p.Summary.Text))
                return Regex.Replace(p.Summary.Text, HTML_TAG_PATTERN, string.Empty);
            else
                return string.Empty;
        }

        private Uri UpdateFeedImageUrl(SyndicationItem p)
        {
            if (p.Links != null)
            {
                foreach (SyndicationLink enclosure in p.Links.Where<SyndicationLink>(x => x.RelationshipType == "enclosure"))
                {
                    if (enclosure.MediaType == "image/jpeg")
                    {
                        return enclosure.Uri; ;
                    }
                }
            }
            return null;
        }


    }


    public class RSSItem
    {
        public System.Uri ImageUrl { get; set; }
        public System.Uri Permalink { get; set; }
        public string PublishDate { get; set; }
        public string Summary { get; set; }
        public string Title { get; set; }
    }

这篇关于RSS源问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！