Question

我试图通过索引值（PAR-17-252）查找文档。我使用

索引了该字段

    Dim d As Lucene.Net.Store.Directory = FSDirectory.Open(New DirectoryInfo(p))
        Dim a As Analyzer = New StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_30)
        Dim indexWriter As IndexWriter = New IndexWriter(d, a, True, indexWriter.MaxFieldLength.UNLIMITED)            

        doc.Add(New Field("GrantID", dr("GrantID").ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED))

我用

搜索

        term = term.Replace("-", " ")
        term = term.Replace("/", " ")

            Dim phases As String() = Nothing
            phases = Split(term, ",")
            For Each phase As String In phases
                q.Add(parser.Parse(phase), Occur.SHOULD)
            Next

现在我知道“ - ”会导致问题，但我不知道如何处理它。如果我不把它从搜索词中删除，我就不会回来，如果我把它留在里面，我什么都不回来。 PAR-17-252是一个记录名称索引。如果我把它取出并试图搜索“PAR 17 252”这个短语，我仍然一无所获。

感谢任何帮助。我已经阅读了关于Lucene.net的所有内容，但仍然遇到了一些麻烦。

Answer 1

您想要使用KeywordAnalyzer搜索该字段。这里有一些C＃为你的用例演示了KeywordAnalyzer，对不起它不是vb.net - 但你应该得到要点。

var field_GrantID = "GrantID";
var field_value = "PAR-17-252";
var luceneVer = Lucene.Net.Util.Version.LUCENE_30;

using (var writer = new IndexWriter(new RAMDirectory(), new StandardAnalyzer(luceneVer), IndexWriter.MaxFieldLength.UNLIMITED))
{
    var doc = new Document();
    // NOT_ANALYZED means index the field as presented.
    doc.Add(new Field(field_GrantID, field_value, Field.Store.YES, Field.Index.NOT_ANALYZED));
    writer.AddDocument(doc);
    writer.Commit();

    using (var searcher = new IndexSearcher(writer.GetReader()))
    {            
        var parser = new QueryParser(luceneVer, field_GrantID, new KeywordAnalyzer());
        var queryText = String.Format("{0}:{1}", field_GrantID, field_value);
        var query = parser.Parse(queryText);
        var topDocs = searcher.Search(query, null, 100);
        Console.WriteLine("Total Hits for query {0} : {1}", query, topDocs.TotalHits);
    }
}

您可能想要搜索多个字段，请查看MultiFieldQueryParser

使用Lucene.net 3.0.3进行精确ID搜索

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