Lucenc.net Full-Text Search create indexes, queries, pagination

 #region Create, follow the new Thesaurus///<summary>///Create, follow the new Thesaurus///</summary> private void CreateIndex Data () {//Index library folder fsdirectory dir = Fsdirectory.open (new DirectoryInfo (path), new Nativefsloc            Kfactory ());            Whether there is an index library bool has = indexreader.indexexists (dir);                    if (has) {//unlocks the locked index library if (indexwriter.islocked (dir)) {                Indexwriter.unlock (dir); }}//Index library Write object IndexWriter IW = new IndexWriter (dir, New Panguanalyzer (),!has, IndexWriter .            maxfieldlength.unlimited);            list<lucenemodel> list = LuceneBll.Instance.Get ();                foreach (var o in list) {document d = new Document (); Field.Store.YES: Store field value (field value before word breaker)//field.store.no: no storage, Storage is not related to indexes//field.store.cOmpress: Compressed storage for long text or binary, but with impaired performance//field.index ANALYZED;           Word Segmentation build index//field.index analyzed_no_norms;                Segmentation Compression Build index//field.index NO;                Field.index not_analyzed;       Non-participle index//field.index not_analyzed_no_norms;                                      Non-segmentation compression build index//field.termvector no;           Field.termvector with_offsets;         Storage offset//field.termvector with_positions; Storage location//field.termvector with_positions_offsets;                    Storage location and offset//field.termvector YES; Store the field's Termvector d.add ("Id", o.id.tostring (), Field.Store.YES, Field.Index.NOT_ANA for each document).                lyzed));                D.add (New Field ("Title", O.title, Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS)); D.add (New Field ("Message", O.message, Field.Store.YES, Field.index.                ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS)); Iw.            Adddocument (d); } IW.            Optimize (); Release the file IW.            Close (); Dir.        Close (); } #endregion

#region Enquiry///<summary>///</summary>//<param name= "str" > keywords to query </param>//<param name= "index" > page index (starting from 1) </param>//<param name= "Count" > number of Data bars per page & lt;/param>//<returns></returns> private list<lucenemodel> Search (string str, int ind            ex = 1, int count = 3) {list<lucenemodel> List = null;            Index Library folder Fsdirectory dir = Fsdirectory.open (new DirectoryInfo (path), new Nativefslockfactory ());            Whether there is an index library bool has = indexreader.indexexists (dir);            Does not exist then create if (!has) {//CREATE INDEX library createindexdata ();            }//Index library Read object Indexreader ir = Indexreader.open (dir, true);            Index Library Query Object Indexsearcher searcher = new Indexsearcher (IR);            Search criteria Phrasequery query = new Phrasequery (); //participle {Segment Segment = new Segment (); icollection<wordinfo> words = segment.                Dosegment (str); foreach (Var o in words) {query.                ADD (New term ("Message", O.tostring ())); }}//Specify the maximum distance between keywords and query.            Setslop (100);            Container TopScoreDocCollector collector = topscoredoccollector.create (Index * count, false) for the results of the query; Query searcher according to query criteria.            Search (query, NULL, collector); scoredoc[] Docs = Collector.            Topdocs (Count * (index-1), Count * (index-1) + count). Scoredocs; if (Docs.                Length > 0) {list = new list<lucenemodel> (); foreach (Var o in docs) {Document document = Searcher.                    Doc (O.doc);                    Lucenemodel m = new Lucenemodel (); M.id = Convert.ToInt32 (document.             Get ("Id"));       M.title = document.                    Get ("Title"); M.message = document.                    Get ("Message"); List.                ADD (m); }}//Release file IR.            Close (); Searcher.            Close (); Dir.            Close ();        return list; } #endregion