How do I get Lucene (.NET) to highlight correctly with wildcards?
- by Scott Stafford
I am using the Lucene.NET API directly in my ASP.NET/C# web application. When I search using a wildcard, like "fuc*", the highlighter doesn't highlight anything, but when I search for the whole word, like "fuchsia", it highlights fine. Does Lucene have the ability to highlight using the same logic it used to match with?
Various maybe-relevant code-snippets below:
var formatter = new Lucene.Net.Highlight.SimpleHTMLFormatter(
"<span class='srhilite'>",
"</span>");
var fragmenter = new Lucene.Net.Highlight.SimpleFragmenter(100);
var scorer = new Lucene.Net.Highlight.QueryScorer(query);
var highlighter = new Lucene.Net.Highlight.Highlighter(formatter, scorer);
highlighter.SetTextFragmenter(fragmenter);
and then on each hit...
string description = Server.HtmlEncode(doc.Get("Description"));
var stream = analyzer.TokenStream("Description",
new System.IO.StringReader(description));
string highlighted_text = highlighter.GetBestFragments(
stream, description, 1, "...");
And I'm using the QueryParser and the StandardAnalyzer.
