當麻許的超技八

FSDirectory dir = FSDirectory.Open(new DirectoryInfo("Index 目錄"));

static RAMDirectory mDirectory = new RAMDirectory();

protected void btnCreateIndexToRam_Click(object sender, EventArgs e)

{

    Stopwatch sw = new Stopwatch();

    // 讀取所有資料

    var di = new DirectoryInfo(AppDomain.CurrentDomain.BaseDirectory + "\\Source\\");

    sw.Start();

    var allObjects = di.GetFiles().Select(

        x => JObject.Parse((File.ReadAllText(x.FullName)))).ToArray();

    //Index 存放路徑

    string indexPath = AppDomain.CurrentDomain.BaseDirectory + "\\Index1\\";

    //IndexWriter

    IndexWriter indexWriter = new IndexWriter(mDirectory, new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29), true, IndexWriter.MaxFieldLength.UNLIMITED);

    // 還原且加入需做 index 的欄位

    foreach (JObject ds in allObjects)

    {

        Document doc = new Document();

        // 把每一個欄位都建立索引

        Field f_Id = new Field("Id", ds["Id"].ToString(), Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.NO);

        Field f_Age = new Field("Age", ds["Age"].ToString(), Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.NO);

        Field f_Memo = new Field("Memo", ds["Memo"].ToString(), Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.NO);

        Field f_BirthDay = new Field("BirthDay", DateTime.Parse(ds["Birthday"].ToString()).ToString("yyyyMMdd"), Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.NO);

        doc.Add(f_Id); doc.Add(f_Age); doc.Add(f_Memo); doc.Add(f_BirthDay);

        indexWriter.AddDocument(doc);

    }

    indexWriter.Optimize();

    indexWriter.Commit();

    indexWriter.Close();

    sw.Stop();

    Response.Write("花費時間: " + sw.Elapsed + "");

}

protected void btnSearchFromRAM_Click(object sender, EventArgs e)

{

    // 啟用監看

    Stopwatch sw = new Stopwatch();

    sw.Start();

    IndexSearcher search = new IndexSearcher(mDirectory, true);

    // 針對 Memo 欄位進行搜尋

    QueryParser parser = new QueryParser(Lucene.Net.Util.Version.LUCENE_29, "Memo", new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29));

    // 搜尋的關鍵字

    Query query = parser.Parse(txtKeyword.Text);

    // 開始搜尋

    var hits = search.Search(query, null, search.MaxDoc()).ScoreDocs;

    sw.Stop();

    Response.Write("花費時間:" + sw.Elapsed + "<br /><hr />");

    Response.Write("資料比數:" + hits.Length + "<br /><hr />");

    Response.Write("Result:<br />");

    foreach (var res in hits)

    {

        // 支援 Lucene.net 3.0 的做法

        Response.Write("Id:" + search.Doc(res.doc).Get("Id") + "  Memo=" + search.Doc(res.doc).Get("Memo").ToString().Replace(txtKeyword.Text, "<span style='color:red'>" + txtKeyword.Text + "</span>") + "<br />");

    }

}