private void Loop()
{
DateTime next = DateTime.Now;
while (true)
{
if (next.CompareTo(DateTime.Now) <= 0)
{
bool b = this.UpdateItemCollection();
next = DateTime.Now.Add(new TimeSpan(0, 0, (b) ? this.FeedLoadInterval : Math.Min(this.FeedLoadInterval, 600)));
}
mCurrentItemIndex++;
if (mCurrentItemIndex >= mItemCollection.Count)
{
mCurrentItemIndex = 0;
}
if (mItemCollection.Count > 0)
{
RSSItem ri = mItemCollection[mCurrentItemIndex];
this.UpdateUI(ri);
}
else
{
this.UpdateUI(this.Default);
}
Thread.Sleep(this.UpdateInterval * 1000);
}
}
/// <summary>
/// Creates an RSS item from an XML node with the
/// corresponding child nodes (title,description etc.)
/// </summary>
/// <param name="xmlNode">The node to extract the details from</param>
/// <returns>An RssItem object with details taken from the item node.</returns>
private RSSItem getRssItem(XmlNode xmlNode)
{
RSSItem rssItem = new RSSItem();
for (int i = 0; i < xmlNode.ChildNodes.Count; i++)
{
switch (xmlNode.ChildNodes[i].Name.ToLower())
{
case "title":
{
rssItem.Title = xmlNode.ChildNodes[i].InnerText;
break;
}
case "description":
{
rssItem.Description = xmlNode.ChildNodes[i].InnerText;
break;
}
case "link":
{
rssItem.Link = xmlNode.ChildNodes[i].InnerText;
break;
}
case "author":
{
rssItem.Author = xmlNode.ChildNodes[i].InnerText;
break;
}
case "comments":
{
rssItem.Comments = xmlNode.ChildNodes[i].InnerText;
break;
}
case "pubdate":
{
rssItem.Pubdate = xmlNode.ChildNodes[i].InnerText;
break;
}
case "guid":
{
rssItem.Guid = xmlNode.ChildNodes[i].InnerText;
break;
}
}
}
return(rssItem);
}
private void UpdateUI(RSSItem item)
{
ToolStrip parent = this.Parent as ToolStrip;
if (parent != null && parent.InvokeRequired)
{
parent.Invoke(new UpdateUIDelegate(DirectUpdateUI), new object[] { item });
}
else
{
this.DirectUpdateUI(item);
}
}
private void DirectUpdateUI(RSSItem item)
{
string txt = item.Title;
if (string.IsNullOrEmpty(item.Pubdate) == false)
{
DateTime dt = DateTime.Parse(item.Pubdate);
if (dt != null)
{
txt += " (" + dt.ToShortDateString() + ")";
}
}
this.Text = txt;
this.Tag = item.Link;
this.LinkVisited = false;
}
private void UpdateUI(RSSItem item)
{
ToolStrip parent = this.Parent as ToolStrip;
if (parent != null && parent.InvokeRequired)
{
parent.Invoke(new UpdateUIDelegate(DirectUpdateUI), new object[] { item });
}
else
{
this.DirectUpdateUI(item);
}
}
private void DirectUpdateUI(RSSItem item)
{
string txt = item.Title;
if (string.IsNullOrEmpty(item.Pubdate) == false)
{
DateTime dt = DateTime.Parse(item.Pubdate);
if (dt != null)
{
txt += " (" + dt.ToShortDateString() + ")";
}
}
this.Text = txt;
this.Tag = item.Link;
this.LinkVisited = false;
}
public void Add(RSSItem rssItem)
{
List.Add(rssItem);
}
/// <summary>
/// Creates an RSS item from an XML node with the
/// corresponding child nodes (title,description etc.)
/// </summary>
/// <param name="xmlNode">The node to extract the details from</param>
/// <returns>An RssItem object with details taken from the item node.</returns>
private RSSItem getRssItem(XmlNode xmlNode)
{
RSSItem rssItem = new RSSItem();
for (int i=0;i < xmlNode.ChildNodes.Count;i++)
{
switch ( xmlNode.ChildNodes[i].Name.ToLower() )
{
case "title":
{
rssItem.Title = xmlNode.ChildNodes[i].InnerText;
break;
}
case "description":
{
rssItem.Description = xmlNode.ChildNodes[i].InnerText;
break;
}
case "link":
{
rssItem.Link = xmlNode.ChildNodes[i].InnerText;
break;
}
case "author":
{
rssItem.Author = xmlNode.ChildNodes[i].InnerText;
break;
}
case "comments":
{
rssItem.Comments = xmlNode.ChildNodes[i].InnerText;
break;
}
case "pubdate":
{
rssItem.Pubdate = xmlNode.ChildNodes[i].InnerText;
break;
}
case "guid":
{
rssItem.Guid = xmlNode.ChildNodes[i].InnerText;
break;
}
}
}
return rssItem;
}
/// <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);
}
public void Add(RSSItem rssItem)
{
List.Add(rssItem);
}
