/// <summary>
/// 读取数据文件中的文章数据
/// </summary>
/// <param name="loadFeed"></param>
/// <returns>读取到的文章数量</returns>
public int loadFeedItems(Feed loadFeed) {
loadFeed.Items.Clear();
IXmlNode database = dbDoc.SelectSingleNode("database");
IXmlNode feedXml = database.SelectSingleNode("feed[uniqueId='" + loadFeed.UniqueId + "']");
if (feedXml == null) return 0;
XmlNodeList feeditemXmlList = feedXml.SelectNodes("feeditem");
foreach (IXmlNode feeditemXml in feeditemXmlList) {
FeedItem feedItem = new FeedItem();
feedItem.Title = feeditemXml.SelectSingleNode("title").InnerText;
feedItem.PubDate = DateTime.Parse(feeditemXml.SelectSingleNode("pubdate").InnerText);
feedItem.Author = feeditemXml.SelectSingleNode("author").InnerText;
feedItem.Content = feeditemXml.SelectSingleNode("content").InnerText;
feedItem.Link = new Uri(feeditemXml.SelectSingleNode("link").InnerText);
feedItem.IsRead = Boolean.Parse(feeditemXml.SelectSingleNode("isread").InnerText);
feedItem.Feed = loadFeed;
loadFeed.Items.Add(feedItem);
}
return feeditemXmlList.Count;
}
/// <summary>
/// 将Feed中指定的文章标记为未读
/// </summary>
/// <param name="item"></param>
public async Task noReadFeedItem(FeedItem item) {
IXmlNode database = dbDoc.SelectSingleNode("database");
IXmlNode feedXml = database.SelectSingleNode("feed[uniqueId='" + item.Feed.UniqueId + "']");
IXmlNode feeditemXml = feedXml.SelectSingleNode("feeditem[link='" + item.Link + "']");
noReadFeedItemXml(feeditemXml);
await saveCache();
}
public async Task loadFeedAsync(Feed loadFeed) {
// using Windows.Web.Syndication;
SyndicationClient client = new SyndicationClient();
try {
SyndicationFeed synFeed = await client.RetrieveFeedAsync(loadFeed.Source);
// This code is executed after RetrieveFeedAsync returns the SyndicationFeed.
// Process it and copy the data we want into our FeedData and FeedItem classes.
if (loadFeed.Title.Trim().Length == 0) {
loadFeed.Title = synFeed.Title.Text;
}
if (synFeed.Subtitle.Text != null && synFeed.Subtitle.Text.Trim().Length != 0) {
loadFeed.Subtitle = synFeed.Subtitle.Text;
}
if (synFeed.Items.Count != 0) {
loadFeed.Description = synFeed.Items[0].Title.Text;
}
// Use the date of the latest post as the last updated date.
loadFeed.PubDate = synFeed.Items[0].PublishedDate.DateTime;
// 加载Feed中的文章，并保存到DB中
List<FeedItem> feedItemList = new List<FeedItem>();
foreach (SyndicationItem item in synFeed.Items) {
FeedItem feedItem = new FeedItem();
feedItem.Title = item.Title.Text;
feedItem.PubDate = item.PublishedDate.DateTime;
feedItem.Author = item.Authors[0].Name.ToString();
// Handle the differences between RSS and Atom feeds
if (synFeed.SourceFormat == SyndicationFormat.Atom10) {
feedItem.Content = item.Content.Text;
feedItem.Link = new Uri("http://windowsteamblog.com" + item.Id);
} else if (synFeed.SourceFormat == SyndicationFormat.Rss20) {
feedItem.Content = item.Summary.Text;
feedItem.Link = item.Links[0].Uri;
}
feedItem.Feed = loadFeed;
feedItemList.Add(feedItem);
}
// 保存到DB
FeedItemDatabase.getInstance().saveFeedItems(loadFeed, feedItemList);
// 读取DB
FeedItemDatabase.getInstance().loadFeedItems(loadFeed);
await FeedItemDatabase.getInstance().saveCache();
} catch (Exception) {
return;
}
}