用Lucene[1].net对数据库建立索引及搜索+
cs代码
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using Lucene.Net;
using Lucene.Net.Index;
using Lucene.Net.Documents;
using Lucene.Net.QueryParsers;
using Lucene.Net.Search;
using Lucene.Net.Analysis.Standard;
using Lucene.Net.Analysis.Cn;
namespace WebApplication4
...{
/**//// <summary>
/// WebForm1 的摘要说明。
/// </summary>
public class WebForm1 : System.Web.UI.Page
...{
protected System.Web.UI.WebControls.TextBox tj;
protected System.Web.UI.WebControls.Button Search;
protected System.Web.UI.WebControls.DataGrid SearGrid;
public string connstr="server=.;database=TopWin2;uid=sa;pwd=";
private void Page_Load(object sender, System.EventArgs e)
...{
// 在此处放置用户代码以初始化页面
if (!Page.IsPostBack)
...{
//打开数据库表
SqlDataReader myred=OpenTable();
//建立索引
IndexWriter writer=CreateIndex(myred);
}
}
public SqlDataReader OpenTable()
...{
SqlConnection mycon=new SqlConnection(connstr);
mycon.Open();
SqlCommand mycom=new SqlCommand("select id,title,content from userblog order by id",mycon);
return mycom.ExecuteReader();
}
public IndexWriter CreateIndex(SqlDataReader myred)
...{
IndexWriter writer = new IndexWriter("c:/index/", new ChineseAnalyzer(), true);
try
...{
//建立索引字段
while(myred.Read())
...{
Document doc=new Document();
doc.Add(Field.Keyword("id",myred["id"].ToString()));
doc.Add(Field.Text("title",myred["title"].ToString()));
doc.Add(Field.Text("content",myred["content"].ToString()));
writer.AddDocument(doc);
}
writer.Optimize();
writer.Close();
}
catch(Exception e)
...{
Response.Write(e);
}
return writer;
}
public Hits seacher(String queryString)
...{
Hits hits=null;
try
...{
IndexSearcher mysea=new IndexSearcher("c:/index/");
Query query=QueryParser.Parse(queryString,"content",new ChineseAnalyzer());
hits=mysea.Search(query);
}
catch(Exception e)
...{
Response.Write(e);
}
return hits;
}
Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
...{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/**//// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
...{
this.Search.Click += new System.EventHandler(this.Search_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void Search_Click(object sender, "",System.EventArgs e)
...{
DataRow myrow;
DataTable mytab=new DataTable();
mytab.Columns.Add("id");
mytab.Columns.Add("title");
mytab.Columns.Add("content");
mytab.Clear();
Hits myhit=seacher(this.tj.Text.Trim());
if (myhit!=null)
...{
for(int i=0;i<myhit.Length();i++)
...{
Document doc=myhit.Doc(i);
myrow=mytab.NewRow();
myrow[0]=doc.Get("id").ToString();
myrow[1]=doc.Get("title").ToString();
myrow[2]=doc.Get("content").ToString();
mytab.Rows.Add(myrow);
myrow.AcceptChanges();
}
this.SearGrid.DataSource=mytab;
this.SearGrid.DataBind();
}
else
...{
//
}
}
}
}