Build the Query.
There are numerous ways you can build your query. I counted 17 different Query classes in the Lucene.Net source code. Here is a list of some of the query classes and when to use them.
| Query Class | Description |
| TermQuery | Searches for a specific term |
| RangeQuery | Searches within a specific range, ex: date range, currency value range |
| BooleanQuery | MUST, MUST_NOT exist in the field |
| MultiTermQuery | Search multiple fields in the same query |
| NumericRangeQuery | Similar to Range, but optimized for numbers |
| FuzzyQuery | Tries to repair incorrectly spelled search parameters |
| QueryParser | Open text, most commonly use query class |
To create the query you will need to provide the query with an Analyzer and the field within each document you want to search in.
The analyzer is created like this:
[sourcecode language="csharp" padlinenumbers="true" autolinks="false" gutter="false" toolbar="false"]
Lucene.Net.Analysis.Analyzer analyzer =
new Lucene.Net.Analysis.Standard.StandardAnalyzer
(Lucene.Net.Util.Version.LUCENE_29);
[/sourcecode]
Then we can create the Query parser:
[sourcecode language="csharp" autolinks="false" gutter="false" toolbar="false"]
LuceneQueryParsers.QueryParser parser =
new QueryParser(LuceneUtil.Version.LUCENE_29,
"fieldName", analyzer);
[/sourcecode]
and then finally, we create the query which we will pass to the search method.
[sourcecode language="csharp" autolinks="false" gutter="false" toolbar="false"] Lucene.Net.Search.Query query = parser.Parse(textBoxSearch.Text); [/sourcecode]
We have now successfully completed step 2 of building an index with Lucene.Net and searching it.