private IHTMLMetaElement GetElement(string metaDataName)
{
metaDataName = metaDataName.ToUpper(CultureInfo.InvariantCulture);
if (!m_metaElementsGenerated)
{
// Get the meta tags
IEnumerator tagEnumerator = MetaDataElements.GetEnumerator();
// Go through all the tags in the head and pull out the meta tags
while (tagEnumerator.MoveNext())
{
IHTMLMetaElement thisTag = (IHTMLMetaElement)tagEnumerator.Current;
if (thisTag.name != null)
{
if (!m_metaElements.ContainsKey(thisTag.name))
{
m_metaElements.Add(thisTag.name.ToUpper(CultureInfo.InvariantCulture), thisTag);
}
}
else if (thisTag.httpEquiv != null)
{
if (!m_metaElements.ContainsKey(thisTag.httpEquiv))
{
m_metaElements.Add(thisTag.httpEquiv.ToUpper(CultureInfo.InvariantCulture), thisTag);
}
}
}
m_metaTableGenerated = true;
}
return((IHTMLMetaElement)m_metaElements[metaDataName]);
}
public void ExtractBookMetaData(HtmlDocument doc, BookMetaData data)
{
data.BookInfo.Author = null;
data.BookInfo.Title = null;
data.BookInfo.Publisher = null;
data.DocInfo.Language = null;
IHTMLDocument2 dom = (IHTMLDocument2)doc.DomDocument;
foreach (IHTMLDOMNode node in dom.all)
{
if (string.Compare(node.nodeName, "meta", true) == 0)
{
IHTMLMetaElement meta = (IHTMLMetaElement)node;
if (string.Compare(meta.name, "author") == 0)
{
data.BookInfo.Author = meta.content;
}
else if (string.Compare(meta.name, "publisher") == 0)
{
data.BookInfo.Publisher = meta.content;
}
else if (string.Compare(meta.name, "content-language") == 0)
{
data.DocInfo.Language = meta.content;
}
}
else if (string.Compare(node.nodeName, "body", true) == 0)
{
// No more meta tags.
break;
}
}
// Get the title
data.BookInfo.Title = GetDocumentTitle(doc);
// If the title or the auther is blank then try to extract it from the
// filename
if (data.BookInfo.Title == null || data.BookInfo.Author == null)
{
string filename = doc.Url.LocalPath;
try
{
FileInfo finfo = new FileInfo(filename);
if (finfo.Extension.Length > 0)
{
filename = finfo.Name.Substring(0, finfo.Name.Length - finfo.Extension.Length);
}
else
{
filename = finfo.Name;
}
string author = null;
string title = null;
if (filename.IndexOf(" - ") != -1)
{
author = filename.Substring(0, filename.IndexOf(" - "));
title = filename.Substring(filename.IndexOf(" - ") + 3);
}
else
{
title = filename;
}
if (data.BookInfo.Title == null && title != null)
{
data.BookInfo.Title = title;
}
if (data.BookInfo.Author == null && author != null)
{
data.BookInfo.Author = author;
}
}
catch (NotSupportedException)
{
// If the URL doesn't map to a filename like "about:blank"
// then this exception can be thrown. We just ignore it.
}
}
}
