Exact search with Lucene.Net - lucene

Question

I already have seen few similar questions, but I still don't have an answer. I think I have a simple problem.
In sentence
In this text, only Meta Files are important, and Test Generation.
Anything else is irrelevant
I want to index only Meta Files and Test Generation. That means that I need exact match.
Could someone please explain me how to achieve this?
And here is the code:
Analyzer analyzer = new StandardAnalyzer();
Lucene.Net.Store.Directory directory = new RAMDirectory();
indexWriter iwriter = new IndexWriter(directory, analyzer, true);
iwriter.SetMaxFieldLength(10000);
Document doc = new Document();
doc.Add(new Field("textFragment", text, Field.Store.YES, Field.Index.TOKENIZED, Field.TermVector.YES));
iwriter.AddDocument(doc);
iwriter.Close();
IndexSearcher isearcher = new IndexSearcher(directory);
QueryParser parser = new QueryParser("textFragment", analyzer);
foreach (DictionaryEntry de in OntologyLayer.OntologyLayer.HashTable)
{
List<string> buffer = new List<string>();
double weight = 0;
List<OntologyLayer.Term> list = (List<OntologyLayer.Term>)de.Value;
foreach (OntologyLayer.Term t in list)
{
Hits hits = null;
string label = t.Label;
string[] words = label.Split(' ');
int numOfWords = words.Length;
double wordWeight = 1 / (double)numOfWords;
double localWeight = 0;
foreach (string a in words)
{
try
{
if (!buffer.Contains(a))
{
Lucene.Net.Search.Query query = parser.Parse(a);
hits = isearcher.Search(query);
if (hits != null && hits.Length() > 0)
{
localWeight = localWeight + t.Weight * wordWeight * hits.Length();
}
buffer.Add(a);
}
}
catch (Exception ex)
{}
}
weight = weight + localWeight;
}
sbWeight.AppendLine(weight.ToString());
if (weight > 0)
{
string objectURI = (string)de.Key;
conceptList.Add(objectURI);
}
}

Answer 1

Take a look at Stupid Lucene Tricks: Exact Match, Starts With, Ends With.