Vendr Faceted Search

FacetedSearch.cs

// Perform a faceted search based on product categories
var dir = new DirectoryInfo(((LuceneIndex)index).LuceneIndexFolder.FullName);
using (var searcher = new IndexSearcher(FSDirectory.Open(dir), false))
using (var factedSearcher = new SimpleFacetedSearch(searcher.IndexReader, new string[] { "searchCategory" }))
{
    var queryParser = new QueryParser(Version.LUCENE_30, "", new KeywordAnalyzer());
    var query = queryParser.Parse(sb.ToString());
    var queryResults = factedSearcher.Search(query, ps * p);

    var facetedResults = new Dictionary<string, PagedResult<IPublishedContent>>();

    foreach (SimpleFacetedSearch.HitsPerFacet hpg in queryResults.HitsPerFacet)
    {
        facetedResults.Add(hpg.Name.ToString(), new PagedResult<IPublishedContent>(hpg.HitCount, p, ps)
        {
            Items = hpg.Documents.Skip(ps * (p - 1)).Select(x => UmbracoContext.Content.GetById(int.Parse(x.Get("id")))).ToList()
        });
    }

    result.Facets = facetedResults;
}