一.摘要
本篇文章作为Lucene.net的开篇文章向您展示在ASP.NET中的基本使用,更深入的话题比如:搜索的关键字高亮显示,索引从数据库中查询的数据,爬虫,索引更新等高级话题将在后续文章中描述.
二.内容
建立一个ASP.NET网站,添加Lucene.net.dll的引用,在Default.aspx页面里添加如下内容:
1: <%@ Page Language="C#" %> 2: 3: <%@ Import Namespace="Lucene.Net.Index" %> 4: <%@ Import Namespace="Lucene.Net.Analysis.Standard" %> 5: <%@ Import Namespace="Lucene.Net.Documents" %> 6: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 7: 8: <script runat="server"> 1: 2: 3: protected void Page_Load(object sender, EventArgs e) 4: { 5: //索引位置 6: string sIndexLocation = MapPath("~/searchlucene/"); 7: bool created; 8: //检测索引是否存在 9: IsIndexExists(out created, sIndexLocation); 10: 11: } 12: private void IsIndexExists(out bool created, string sIndexPath) 13: { 14: created = false; 15: if (!IndexReader.IndexExists(sIndexPath)) 16: { 17: IndexWriter writer = new IndexWriter(sIndexPath, new StandardAnalyzer(), true); 18: created = true; 19: writer.Close(); 20: } 21: } 22: //创建索引 23: protected void btnCreateIndex_Click(object sender, EventArgs e) 24: { 25: IndexWriter writer = new IndexWriter(MapPath("~/searchlucene/"), new StandardAnalyzer(), false); 26: 27: IndexDocument(writer, "中国", "China", "北京"); 28: IndexDocument(writer, "美国", "USA", "密歇根"); 29: IndexDocument(writer, "日本", "Jap", "小日本"); 30: IndexDocument(writer, "中国", "China", "人均"); 31: IndexDocument(writer, "2010", "情人节", "万维网"); 32: 33: writer.Optimize(); 34: writer.Close(); 35: 36: } 37: //添加文件到索引 38: private void IndexDocument(IndexWriter writer, string sHeader, string sType, string sContent) 39: { 40: Document doc = new Document(); 41: 42: doc.Add(new Field("header", sHeader, Field.Store.YES, Field.Index.TOKENIZED)); 43: doc.Add(new Field("type", sType, Field.Store.YES, Field.Index.UN_TOKENIZED)); 44: doc.Add(new Field("content", sContent, Field.Store.YES, Field.Index.TOKENIZED)); 45: 46: writer.AddDocument(doc); 47: 48: } 49: //搜索 50: protected void btnSearch_Click(object sender, EventArgs e) 51: { 52: ListBox1.Items.Clear(); 53: 54: var searcher = new Lucene.Net.Search.IndexSearcher(MapPath("~/searchlucene/")); 55: var oParser = new Lucene.Net.QueryParsers.QueryParser("content", new StandardAnalyzer()); 56: string sHeader = " OR (header:" + TextBox1.Text + ")"; 57: string sSearchQuery = "(" + TextBox1.Text + sHeader + ")"; 58: 59: //解析搜索关键字 60: var oHitColl = searcher.Search(oParser.Parse(sSearchQuery)); 61: for (int i = 0; i < oHitColl.Length(); i++) 62: { 63: Document oDoc = oHitColl.Doc(i); 64: ListBox1.Items.Add(new ListItem(oDoc.Get("header") + oDoc.Get("type") + oDoc.Get("content"))); 65: } 66: 67: searcher.Close(); 68: }script> 9: 10: <html xmlns="http://www.w3.org/1999/xhtml"> 11: <head id="Head1" runat="server"> 12: <title>Lucene例子title> 13: head> 14: <body> 15: <form id="form1" runat="server"> 16: <div> 17: div> 18: 1- 19: <asp:Button ID="btnCreateIndex" runat="server" OnClick="btnCreateIndex_Click" Text="index create" /> 20: <br /> 21: <br /> 22: 2- <asp:TextBox ID="TextBox1" runat="server">asp:TextBox> 23: <asp:Button ID="btnSearch" runat="server" onclick="btnSearch_Click" Text="Search" /> 24: <p> 25: p> 26: <p> 27: p> 28: <asp:ListBox ID="ListBox1" runat="server" Height="322px" Width="712px">asp:ListBox> 29: form> 30: body> 31: html>在文本框中输入关键字比如:中国.将列出包含中国关键字的条目
三.源码
由于上传的源码要经过审核,所以我稍后会以评论的形式提供完整版源码地址,谢谢您的访问!
