private void BindSearchResult(string keyword, int startIndex, int pageSize, out int totalCount)
{
string indexPath = Context.Server.MapPath("~/Index"); // 索引文档保存位置
FSDirectory directory = FSDirectory.Open(new DirectoryInfo(indexPath), new NoLockFactory());
IndexReader reader = IndexReader.Open(directory, true);
IndexSearcher searcher = new IndexSearcher(reader);
#region v1.0 单条件查询
//// 查询条件
//PhraseQuery query = new PhraseQuery();
//// 分词后加入查询
//IEnumerable<string> keyList = SplitHelper.SplitWords(keyword);
//foreach (var key in keyList)
//{
// query.Add(new Term("msg", key));
//}
//// 两个词的距离大于100（经验值）就不放入搜索结果，因为距离太远相关度就不高了
//query.SetSlop(100);
#endregion
#region v2.0 多条件查询
IEnumerable <string> keyList = SplitHelper.SplitWords(keyword);
PhraseQuery queryTitle = new PhraseQuery();
foreach (var key in keyList)
{
queryTitle.Add(new Term("title", key));
}
queryTitle.SetSlop(100);
PhraseQuery queryMsg = new PhraseQuery();
foreach (var key in keyList)
{
queryMsg.Add(new Term("msg", key));
}
queryMsg.SetSlop(100);
BooleanQuery query = new BooleanQuery();
query.Add(queryTitle, BooleanClause.Occur.SHOULD); // SHOULD => 可以有，但不是必须的
query.Add(queryTitle, BooleanClause.Occur.SHOULD); // SHOULD => 可以有，但不是必须的
#endregion
// TopScoreDocCollector:盛放查询结果的容器
TopScoreDocCollector collector = TopScoreDocCollector.create(1000, true);
// 使用query这个查询条件进行搜索，搜索结果放入collector
searcher.Search(query, null, collector);
// 首先获取总条数
totalCount = collector.GetTotalHits();
// 从查询结果中取出第m条到第n条的数据
ScoreDoc[] docs = collector.TopDocs(startIndex, pageSize).scoreDocs;
// 遍历查询结果
IList <SearchResult> resultList = new List <SearchResult>();
for (int i = 0; i < docs.Length; i++)
{
// 拿到文档的id，因为Document可能非常占内存（DataSet和DataReader的区别）
int docId = docs[i].doc;
// 所以查询结果中只有id，具体内容需要二次查询
// 根据id查询内容：放进去的是Document，查出来的还是Document
Document doc = searcher.Doc(docId);
SearchResult result = new SearchResult();
result.Url = "ViewArticle.aspx?id=" + doc.Get("id");
result.Title = HighlightHelper.HighLight(keyword, doc.Get("title"));
result.Msg = HighlightHelper.HighLight(keyword, doc.Get("msg")) + "......";
resultList.Add(result);
}
// 绑定到Repeater
rptSearchResult.DataSource = resultList;
rptSearchResult.DataBind();
}
