Search across fields in Lucene

Question

I'm a complete noobie with Lucene and so far a huge, huge fan.

I'm now looking for some resources on how to store data and search through c# and dotnet. Any LINQ samples would be a big bonus to me.

In particular if I have a document that has two fields defined as say title and description, how can i search in both?

in the sample below i'd like to search both title and description fields.

eg:

        doc = new Document();
        text = "Oven leek pie";
        doc.Add(new Field("title", text, Field.Store.YES, Field.Index.TOKENIZED));
        doc.Add(new Field("instructions", "Bake for 40 minutes", Field.Store.YES, Field.Index.TOKENIZED));
        iwriter.AddDocument(doc);

and then;

        // Parse a simple query that searches for "text":
        Lucene.Net.QueryParsers.QueryParser parser = new QueryParser("title", analyzer);

        Query query = parser.Parse("baked bacon and leek pizza");

gotnull · Accepted Answer · 2012-12-18T05:09:34.400

10

string[] fields = new string[2];
fields[0] = "title";
fields[1] = "instructions";

Lucene.Net.QueryParsers.MultiFieldQueryParser multiFieldParser = new MultiFieldQueryParser(fields, analyzer);
Query multiFieldQuery = multiFieldParser.Parse("20");
Hits multiHits = isearcher.Search(multiFieldQuery);

edited Dec 18 '12 at 05:09

answered Jul 21 '10 at 01:11

gotnull

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score 2 · Answer 2 · edited May 23 '17 at 11:48

2

There are many ways to search across fields in Lucene. Sam Doshi describes several in this answer to another StackOverflow question: How to incorporate multiple fields in QueryParser?

edited May 23 '17 at 11:48

Community

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answered Sep 07 '10 at 19:12

dthrasher

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Search across fields in Lucene

2 Answers2