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POLucene.net cant search ".net"
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copied!<p>Q1: I am making a search using Lucene. Everything works fine and quickly. When I tried to search for the phrase ".net", it didn't find anything. Maybe you know how can I cope with this.</p> <p>Q2: How can I search and ignore case?</p> <p><strong>Update 1</strong></p> <p>Q1:I am saving jobs using <a href="http://simplelucene.codeplex.com/" rel="nofollow">SimpleLucene</a>. Here is the code:</p> <pre><code>DirectoryIndexWriter _indexWriter = new DirectoryIndexWriter(new DirectoryInfo(indexPath), true); using (var indexService = new IndexService(_indexWriter)) { var result = indexService.IndexEntities(jobsTempArray, new JobIndexDefinition()); Console.WriteLine("{0} products indexed in {1} milliseconds.", result.Count, result.ExecutionTime); } </code></pre> <p>JobIndexDefinition file:</p> <pre><code>public class JobIndexDefinition : IIndexDefinition<LucenceJobModel> { public Document Convert(LucenceJobModel job) { var document = new Document(); document.Add(new Field("jobtitle", job.JobTitle, Field.Store.YES, Field.Index.ANALYZED)); document.Add(new Field("AreaCode", job.AreaCode.ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED)); document.Add(new Field("Company", job.Company, Field.Store.YES, Field.Index.NOT_ANALYZED)); var dateValue = DateTools.DateToString(job.DatePosted.Value, DateTools.Resolution.MILLISECOND); document.Add(new Field("DatePosted", dateValue, Field.Store.YES, Field.Index.NOT_ANALYZED)); document.Add(new Field("Description", job.Description, Field.Store.YES, Field.Index.ANALYZED)); document.Add(new Field("Expierence", job.Expierence, Field.Store.YES, Field.Index.NOT_ANALYZED)); document.Add(new Field("JobType", job.JobType, Field.Store.YES, Field.Index.NOT_ANALYZED)); document.Add(new Field("Link", job.Link, Field.Store.YES, Field.Index.NOT_ANALYZED)); document.Add(new Field("LinkId", job.LinkId.ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED)); document.Add(new Field("Location", job.Location, Field.Store.YES, Field.Index.NOT_ANALYZED)); document.Add(new Field("PayRate", job.PayRate, Field.Store.YES, Field.Index.NOT_ANALYZED)); document.Add(new Field("Source", job.Source, Field.Store.YES, Field.Index.NOT_ANALYZED)); document.Add(new Field("TaxTerm", job.TaxTerm, Field.Store.YES, Field.Index.NOT_ANALYZED)); document.Add(new Field("Term", job.Term, Field.Store.YES, Field.Index.NOT_ANALYZED)); document.Add(new Field("Title", job.Title, Field.Store.YES, Field.Index.NOT_ANALYZED)); return document; } public Term GetIndex(LucenceJobModel job) { return new Term("Link", job.Link); } } </code></pre> <p>I am searching for JobTitle, Description and DatePosted fields. Here is the search code:</p> <pre><code>public List<LucenceJobModel> JobsSearch(string keyword, string location, PageInfo pageInfo) { string[] words = keyword.Split(new[] { ' ' }); IndexReader reader = IndexReader.Open(SmartSearch.Instance.GetDirectory(), true); var searcher = new IndexSearcher(reader); var standardAnalyzer = new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29); var fields = new[] { "JobTitle", "Description", "DatePosted" }; var searchQuery = new MultiFieldQueryParser(Lucene.Net.Util.Version.LUCENE_29, fields, standardAnalyzer); //searchQuery.SetAllowLeadingWildcard(true); // perform the search var query = new BooleanQuery(); foreach (var word in words) { if (!String.IsNullOrEmpty(word)) { var qTemp = searchQuery.Parse(word); var q = searchQuery.Parse(qTemp.ToString().Substring(qTemp.ToString().LastIndexOf(":") + 1) + "*"); query.Add(q, BooleanClause.Occur.MUST); } } int maxDocs = 1; if (reader.MaxDoc() > 0) maxDocs = reader.MaxDoc(); var results = searcher.Search(query, filter, maxDocs); foreach (var scoreDoc in results.scoreDocs) { var document = searcher.Doc(scoreDoc.doc); } var jobs = new List<LucenceJobModel>(); for (int i = 0; i < results.scoreDocs.Length; i++) { var document = searcher.Doc(results.scoreDocs[i].doc); if (i >= (pageInfo.CurrentPage - 1) * pageInfo.ItemsPerPage && i < pageInfo.CurrentPage * pageInfo.ItemsPerPage) { jobs.Add(LucenceJobModel.ConvertFromDoc(document)); } itemsForGroup.Add(new ItemGroupFor { Company = document.GetField("Company").StringValue(), DatePosted = DateTools.StringToDate(document.GetField("DatePosted").StringValue()), JobType = document.GetField("JobType").StringValue(), Location = document.GetField("Location").StringValue(), Source = document.GetField("Source").StringValue(), Title = document.GetField("Title").StringValue() }); } pageInfo.TotalItems = results.scoreDocs.Length; return jobs; } </code></pre> <p>I want to be able to search for keywords such as "C#" or ".net" without deleting "#" or ".". </p> <p>Q2: I am searching in Location field. Here is code:</p> <pre><code>public List<string> GetLocations(string term) { IndexReader reader = IndexReader.Open(SmartSearch.Instance.GetDirectory(), true); var searcher = new IndexSearcher(reader); var standardAnalyzer = new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29); QueryParser parser = new QueryParser(Lucene.Net.Util.Version.LUCENE_29, "Location", standardAnalyzer); string str = parser.Parse(term).ToString().Substring(parser.Parse(term).ToString().LastIndexOf(":") + 1); PrefixQuery q = new PrefixQuery(new Term("Location", string.Format("{0}", str))); TopDocs results = searcher.Search(q, 5000); return results .scoreDocs .Select(x => searcher.Doc(x.doc)) .Select(x => x.GetField("Location").StringValue()) .Distinct() .ToList(); } </code></pre> <p>I want to search for "New york", "New York" and so on. But I know it searches only if case is right. </p>

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