Lucene.net搜索结果排序（单条件和多条件）

string INDEX_STORE_PATH = Server.MapPath("index");  //INDEX_STORE_PATH 为索引存储目录
        string keyword = TextBox2.Text;                     //搜索内容

         Hits myhit = null;
         
         IndexSearcher mysea = new IndexSearcher(INDEX_STORE_PATH);
         QueryParser q = new QueryParser("indexcontent", new StandardAnalyzer());
         Query query = q.Parse(keyword);

         Sort sort = new Sort();
         SortField f = new SortField("createdate", SortField.STRING, true);//按照createdate字段排序，true表示降序
         sort.SetSort(f);

        //多个条件排序
        //Sort sort = new Sort();
        //SortField f1 = new SortField("createdate", SortField.DOC, true);
        //SortField f2 = new SortField("bookname", SortFiedl.INT, false);
        //sort.setSort(new SortField[] { f1, f2 });

         myhit = mysea.Search(query, sort);
         Response.Write("关于：" + keyword + "   搜索到" + myhit.Length() + "个结果<br>");