private bool UpdateItemCollection()
{
bool ret = false;
foreach (string u in mUrlList)
{
RSSFeed f = RSSReader.GetFeed(u);
if (string.IsNullOrEmpty(f.ErrorMessage))
{
mItemCollection.RemoveAll(delegate(RSSItem o) { return(o.Feed.URL == u); });
foreach (RSSItem i in f.Items)
{
mItemCollection.Add(i);
ret = true;
}
}
}
return(ret);
}
/// <summary>
/// Retrieves an RSS feed using the given Url, parses it and
/// creates and new <see cref="RssFeed">RssFeed</see> object with the information.
/// If an error occurs in the XML loading of the document, or parsing of
/// the RSS feed, the error is trapped and stored inside the RssFeed's
/// ErrorMessage property.
/// </summary>
/// <param name="Url">The url to retrieve the RSS feed from, this can
/// be in the format of http:// and also file://.. (ftp?)</param>
/// <returns>An <see cref="RssFeed">RssFeed</see> object with information
/// retrieved from the feed.</returns>
public RSSFeed Retrieve(string Url)
{
RSSFeed rssFeed = new RSSFeed();
rssFeed.URL = Url;
rssFeed.Items = new RSSItemCollection();
XmlTextReader xmlTextReader = new XmlTextReader(Url);
XmlDocument xmlDoc= new XmlDocument();
try
{
xmlDoc.Load(xmlTextReader);
// Fire the load event
if (this.FeedLoaded != null)
{
this.FeedLoaded(this, new EventArgs());
}
XmlNode rssXmlNode = null;
// Loop child nodes till we find the rss one
for (int i = 0; i < xmlDoc.ChildNodes.Count; i++)
{
System.Diagnostics.Debug.Write("Child: " + xmlDoc.ChildNodes[i].Name);
System.Diagnostics.Debug.WriteLine(" has " + xmlDoc.ChildNodes[i].ChildNodes.Count + " children");
if (xmlDoc.ChildNodes[i].Name == this.rootNodeName && xmlDoc.ChildNodes[i].ChildNodes.Count > 0)
{
rssXmlNode = xmlDoc.ChildNodes[i];
// Fire the found event
if (this.RssNodeFound != null)
{
this.RssNodeFound(this, new EventArgs());
}
break;
}
}
if (rssXmlNode != null)
{
XmlNode channelXmlNode = null;
// Loop through the rss node till we find the channel
for (int i = 0; i < rssXmlNode.ChildNodes.Count; i++)
{
System.Diagnostics.Debug.WriteLine("Rss child: " + rssXmlNode.ChildNodes[i].Name);
if (rssXmlNode.ChildNodes[i].Name == this.channelNodeName && rssXmlNode.ChildNodes[i].ChildNodes.Count > 0)
{
channelXmlNode = rssXmlNode.ChildNodes[i];
// Fire the found event
if (this.ChannelNodeFound != null)
{
this.ChannelNodeFound(this, new EventArgs());
}
break;
}
}
// Found the channel node
if (channelXmlNode != null)
{
// Loop through its children, copying details to the
// RssFeed struct, and parsing the items
for (int i = 0; i < channelXmlNode.ChildNodes.Count; i++)
{
System.Diagnostics.Debug.WriteLine(channelXmlNode.ChildNodes[i].Name);
switch (channelXmlNode.ChildNodes[i].Name.ToLower())
{
case "title":
{
rssFeed.Title = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "description":
{
rssFeed.Description = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "language":
{
rssFeed.Language = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "copyright":
{
rssFeed.Copyright = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "webmaster":
{
rssFeed.Webmaster = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "pubDate":
{
rssFeed.PubDate = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "lastBuildDate":
{
rssFeed.LastBuildDate = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "category":
{
rssFeed.Category = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "generator":
{
rssFeed.Generator = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "ttl":
{
rssFeed.Ttl = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "rating":
{
rssFeed.Rating = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "skipHours":
{
rssFeed.Skiphours = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "skipDays":
{
rssFeed.Skipdays = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "managingEditor":
{
rssFeed.ManagingEditor = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "item":
{
RSSItem t = this.getRssItem(channelXmlNode.ChildNodes[i]);
t.Feed = rssFeed;
rssFeed.Items.Add(t);
// Fire the found event
if (this.ItemAdded != null)
{
this.ItemAdded(this, new EventArgs());
}
break;
}
}
}
// If rdf mode is set, then the channel node only contains
// information about the channel, it doesn't hold the item
// nodes. The item nodes are children of the root node in
// an RDF document, so we use this instead.
if (this.RdfMode)
{
for (int i = 0; i < rssXmlNode.ChildNodes.Count; i++)
{
switch (rssXmlNode.ChildNodes[i].Name)
{
case "item":
{
RSSItem t = this.getRssItem(rssXmlNode.ChildNodes[i]);
t.Feed = rssFeed;
rssFeed.Items.Add(t);
// Fire the found event
if (this.ItemAdded != null)
{
this.ItemAdded(this, new EventArgs());
}
break;
}
}
}
}
}
else
{
rssFeed.ErrorMessage = "Unable to find rss <seehannel> node";
// Fire the error event
if (this.Error != null)
{
RSSReaderErrorEventArgs args = new RSSReaderErrorEventArgs();
args.Message = rssFeed.ErrorMessage;
this.Error(this, args);
}
}
}
else
{
rssFeed.ErrorMessage = "Unable to find root <rss> node";
// Fire the error event
if (this.Error != null)
{
RSSReaderErrorEventArgs args = new RSSReaderErrorEventArgs();
args.Message = rssFeed.ErrorMessage;
this.Error(this, args);
}
}
}
catch (XmlException err)
{
//
rssFeed.ErrorMessage = "Xml error: " + err.Message;
// Fire the error event
if (this.Error != null)
{
RSSReaderErrorEventArgs args = new RSSReaderErrorEventArgs();
args.Message = rssFeed.ErrorMessage;
this.Error(this, args);
}
return rssFeed;
}
catch (WebException we)
{
rssFeed.ErrorMessage = "Web error: " + we.Message;
}
return rssFeed;
}
/// <summary>
/// Retrieves an RSS feed using the given Url, parses it and
/// creates and new <see cref="RssFeed">RssFeed</see> object with the information.
/// If an error occurs in the XML loading of the document, or parsing of
/// the RSS feed, the error is trapped and stored inside the RssFeed's
/// ErrorMessage property.
/// </summary>
/// <param name="Url">The url to retrieve the RSS feed from, this can
/// be in the format of http:// and also file://.. (ftp?)</param>
/// <returns>An <see cref="RssFeed">RssFeed</see> object with information
/// retrieved from the feed.</returns>
public RSSFeed Retrieve(string Url)
{
RSSFeed rssFeed = new RSSFeed();
rssFeed.URL = Url;
rssFeed.Items = new RSSItemCollection();
XmlTextReader xmlTextReader = new XmlTextReader(Url);
XmlDocument xmlDoc = new XmlDocument();
try
{
xmlDoc.Load(xmlTextReader);
// Fire the load event
if (this.FeedLoaded != null)
{
this.FeedLoaded(this, new EventArgs());
}
XmlNode rssXmlNode = null;
// Loop child nodes till we find the rss one
for (int i = 0; i < xmlDoc.ChildNodes.Count; i++)
{
System.Diagnostics.Debug.Write("Child: " + xmlDoc.ChildNodes[i].Name);
System.Diagnostics.Debug.WriteLine(" has " + xmlDoc.ChildNodes[i].ChildNodes.Count + " children");
if (xmlDoc.ChildNodes[i].Name == this.rootNodeName && xmlDoc.ChildNodes[i].ChildNodes.Count > 0)
{
rssXmlNode = xmlDoc.ChildNodes[i];
// Fire the found event
if (this.RssNodeFound != null)
{
this.RssNodeFound(this, new EventArgs());
}
break;
}
}
if (rssXmlNode != null)
{
XmlNode channelXmlNode = null;
// Loop through the rss node till we find the channel
for (int i = 0; i < rssXmlNode.ChildNodes.Count; i++)
{
System.Diagnostics.Debug.WriteLine("Rss child: " + rssXmlNode.ChildNodes[i].Name);
if (rssXmlNode.ChildNodes[i].Name == this.channelNodeName && rssXmlNode.ChildNodes[i].ChildNodes.Count > 0)
{
channelXmlNode = rssXmlNode.ChildNodes[i];
// Fire the found event
if (this.ChannelNodeFound != null)
{
this.ChannelNodeFound(this, new EventArgs());
}
break;
}
}
// Found the channel node
if (channelXmlNode != null)
{
// Loop through its children, copying details to the
// RssFeed struct, and parsing the items
for (int i = 0; i < channelXmlNode.ChildNodes.Count; i++)
{
System.Diagnostics.Debug.WriteLine(channelXmlNode.ChildNodes[i].Name);
switch (channelXmlNode.ChildNodes[i].Name.ToLower())
{
case "title":
{
rssFeed.Title = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "description":
{
rssFeed.Description = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "language":
{
rssFeed.Language = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "copyright":
{
rssFeed.Copyright = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "webmaster":
{
rssFeed.Webmaster = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "pubDate":
{
rssFeed.PubDate = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "lastBuildDate":
{
rssFeed.LastBuildDate = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "category":
{
rssFeed.Category = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "generator":
{
rssFeed.Generator = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "ttl":
{
rssFeed.Ttl = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "rating":
{
rssFeed.Rating = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "skipHours":
{
rssFeed.Skiphours = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "skipDays":
{
rssFeed.Skipdays = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "managingEditor":
{
rssFeed.ManagingEditor = channelXmlNode.ChildNodes[i].InnerText;
break;
}
case "item":
{
RSSItem t = this.getRssItem(channelXmlNode.ChildNodes[i]);
t.Feed = rssFeed;
rssFeed.Items.Add(t);
// Fire the found event
if (this.ItemAdded != null)
{
this.ItemAdded(this, new EventArgs());
}
break;
}
}
}
// If rdf mode is set, then the channel node only contains
// information about the channel, it doesn't hold the item
// nodes. The item nodes are children of the root node in
// an RDF document, so we use this instead.
if (this.RdfMode)
{
for (int i = 0; i < rssXmlNode.ChildNodes.Count; i++)
{
switch (rssXmlNode.ChildNodes[i].Name)
{
case "item":
{
RSSItem t = this.getRssItem(rssXmlNode.ChildNodes[i]);
t.Feed = rssFeed;
rssFeed.Items.Add(t);
// Fire the found event
if (this.ItemAdded != null)
{
this.ItemAdded(this, new EventArgs());
}
break;
}
}
}
}
}
else
{
rssFeed.ErrorMessage = "Unable to find rss <seehannel> node";
// Fire the error event
if (this.Error != null)
{
RSSReaderErrorEventArgs args = new RSSReaderErrorEventArgs();
args.Message = rssFeed.ErrorMessage;
this.Error(this, args);
}
}
}
else
{
rssFeed.ErrorMessage = "Unable to find root <rss> node";
// Fire the error event
if (this.Error != null)
{
RSSReaderErrorEventArgs args = new RSSReaderErrorEventArgs();
args.Message = rssFeed.ErrorMessage;
this.Error(this, args);
}
}
}
catch (XmlException err)
{
//
rssFeed.ErrorMessage = "Xml error: " + err.Message;
// Fire the error event
if (this.Error != null)
{
RSSReaderErrorEventArgs args = new RSSReaderErrorEventArgs();
args.Message = rssFeed.ErrorMessage;
this.Error(this, args);
}
return(rssFeed);
}
catch (WebException we)
{
rssFeed.ErrorMessage = "Web error: " + we.Message;
}
return(rssFeed);
}