string indexPath = @"c:\index";
//索引的存放路径
FSDirectory fsDire = FSDirectory.Open(new DirectoryInfo(indexPath));
//创建一个FsDirectory对象
bool isLive = IndexReader.IndexExists(fsDire);
//查看目录是否存在
if (isLive) System.IO.Directory.Delete(indexPath,true);
//删除旧的索引
System.IO.Directory.CreateDirectory(indexPath);
isLive = IndexReader.IndexExists(fsDire);
if (IndexWriter.IsLocked(fsDire))
{
//如果上锁则解锁
IndexWriter.Unlock(fsDire);
}

IndexWriter writer = new IndexWriter(fsDire, new PanGuAnalyzer(), !isLive, IndexWriter.MaxFieldLength.UNLIMITED);
//fsDire 存放位置
//new PanGuAnalyzer() 盘古分词
//!isLive 是否创建
//IndexWriter.MaxFieldLength.UMLIMITED 字段长度无限
//成功创建一个用以向文件夹写入索引数据的IndexWriter对象
string txtPath = @"c:\倾世魔师.txt";
//文章的地址
Document document = new Document();
//新建一个document(索引)对象
document.Add(new Field("id", "1", Field.Store.YES, Field.Index.NOT_ANALYZED));

document.Add(new Field("body", File.ReadAllText(txtPath, Encoding.Default), Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS));

//为索引对象添加字段，一个存放Id，另一个存放主要内容。
writer.AddDocument(document);
//将索引写到相对应的位置
writer.Close();
fsDire.Close();

string indexPath = @"c:\index";
//索引存放的路径。
string keyWords = TextBox1.Text;
//关键字
FSDirectory fsDire = FSDirectory.Open(new DirectoryInfo(indexPath),new NoLockFactory());
//创建一个FSDirectroy对象
IndexReader reader = IndexReader.Open(fsDire);
//创建一个IndexReader对象
IndexSearcher searcher = new IndexSearcher(reader);
//创建一个IndexSearcher对象
PhraseQuery query = new PhraseQuery();
//创建一个PhraseQuery对象

Lucene.Net.Analysis.Analyzer analyzer = new PanGuAnalyzer();

Lucene.Net.Analysis.TokenStream tokenStream = analyzer.TokenStream("", new StringReader(keyWords));

Lucene.Net.Analysis.Token token = null;
while ((token = tokenStream.Next()) != null)
{
query.Add(new Term("body", token.Term()));

}

//为关键字进行分词，再作查询。
query.SetSlop(50);
TopScoreDocCollector collector = TopScoreDocCollector.create(200,true);
searcher.Search(query,null,collector);
ScoreDoc[] docs = collector.TopDocs(0,collector.GetTotalHits()).scoreDocs;
for (int i = 0; i < docs.Length; i++)
{
int docId = docs[i].doc;
Document document = searcher.Doc(docId);
Response.Write(document.Get("body"));
}