Lucene. Net is a full-text search framework, not an application product.
For the two DLL files used, you can download them at http://d.download.csdn.net/down/2352061/taomanfor free.
Directly paste the Code:
<% @ Page Language = "C #" autoeventwireup = "true" codefile = "xxjs. aspx. cs" inherits = "xxjs_xxjs" %>
<% @ Register Assembly = "aspnetpager" namespace = "Wuqi. webdiyer" tagprefix = "webdiyer" %>
<! Doctype HTML public "-// W3C // dtd xhtml 1.0 transitional // en" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<HTML xmlns = "http://www.w3.org/1999/xhtml">
<Head runat = "server">
<Title> </title>
</Head>
<Body>
<Form ID = "form1" runat = "server">
<Div>
<Div style = "height: 40px">
<Asp: button id = "btncreateindex" text = "create Index" runat = "server" onclick = "btncreateindex_click"/>
<Asp: Label id = "lbstatus" runat = "server"> </ASP: Label>
</Div>
<Table>
<Tr>
<TD> <asp: textbox id = "tbsearchcontent" runat = "server" Height = "20px" width = "155px"> </ASP: textbox> </TD>
<TD> <asp: button id = "btnsearch" runat = "server" text = "Search" onclick = "btnsearch_click"/> </TD>
</Tr>
</Table>
<Div id = "MSG" runat = "server" bordercolorlight = "#99cc99"
Bordercolordark = "#669933" bgcolor = "# dde3ce" style = "background-color: # c0c0c0"> </div>
<Div>
<Asp: gridview id = "gridview1" runat = "server" autogeneratecolumns = "false"
Width = "100%" gridlines = "NONE" allowpaging = "true"
Onpageindexchanging = "gridview1_pageindexchanging">
<Columns>
<Asp: templatefield>
<Itemtemplate>
<Table width = "100%" border = "0" align = "center" cellpadding = "5" cellspacing = "1">
<Tr>
<TD bgcolor = "# ffffff">
<Font size = "2"> <asp: hyperlink id = "hyperlink1" runat = "server" text = '<% # eval ("title ") %> 'navigateurl = '<% # eval ("link address") %>'> </ASP: hyperlink> </font>
</TD>
</Tr>
<Tr>
<TD>
<Font size = "2"> <% # This. getsubstring (eval ("content"). tostring () %> </font>
</TD>
</Tr>
</Table>
</Itemtemplate>
</ASP: templatefield>
</Columns>
</ASP: gridview>
</Div>
</Div>
</Form>
</Body>
</Html>
Certificate ----------------------------------------------------------------------------------------------------------------------------------------------------
Using system;
Using system. configuration;
Using system. Data;
Using system. LINQ;
Using system. Web;
Using system. Web. Security;
Using system. Web. UI;
Using system. Web. UI. htmlcontrols;
Using system. Web. UI. webcontrols;
Using system. Web. UI. webcontrols. webparts;
Using system. xml. LINQ;
Using system. Data. sqlclient;
Using system. text;
Using system. IO;
Using system. collections;
Using USTC;
Using Lucene. net. documents;
Using Lucene. net. index;
Using Lucene. net. search;
Using Lucene. net. queryparsers;
Using Lucene. net. analysis. Standard;
Using Lucene. net. store;
Using Lucene. net. Highlight;
Using Lucene. net. analysis;
Public partial class xxjs_xxjs: system. Web. UI. Page
{
Protected void page_load (Object sender, eventargs E)
{
If (! Page. ispostback)
{
// Obtain information only when the screen is read for the first time
Vsdatatable = new datatable ();
}
Pagedatabind (); // bind data
}
Protected void btncreateindex_click (Object sender, eventargs E)
{
Createindex ();
}
// Create an index
Public indexwriter createindex ()
{
String index_store_path = server. mappath ("Index"); // index_store_path is the index storage directory.
// Indexreader reader = indexreader. Open (index_store_path );
// Term term = new term (field, key );
// Reader. deletedocuments (TERM );
// Reader. Close ();
Indexwriter writer = NULL;
Try
{
Writer = new indexwriter (index_store_path, new standardanalyzer (), true );
DM dm = new DM ();
String strsql = "select c_title, c_text, c_url from v_searches ";
Dataset DS = DM. getsql (strsql );
// Create an index Field
Foreach (datarowview DRV in DS. Tables [0]. defaultview)
{
Document Doc = new document ();
Doc. Add (new field ("title", DRV ["c_title"]. tostring (), field. Store. Yes, field. Index. un_tokenized ));
Doc. Add (new field ("content", DRV ["c_text"]. tostring (), field. Store. Yes, field. Index. un_tokenized ));
Doc. Add (new field ("link address", DRV ["c_url"]. tostring (), field. Store. Yes, field. Index. un_tokenized ));
Doc. add (new field ("title and content", DRV ["c_title"]. tostring () + DRV ["c_text"]. tostring (), field. store. yes, field. index. tokenized); // No storage, index, title, and content index.
Writer. adddocument (DOC );
}
Writer. Optimize ();
Writer. Close ();
This. lbstatus. Text = "Index created successfully! ";
}
Catch
{
This. lbstatus. Text = "the index has been created. You do not need to create a new one! ";
}
Return writer;
}
// Information Retrieval
Protected void btnsearch_click (Object sender, eventargs E)
{
Bindlucenedata ();
}
Public void bind1_edata ()
{
String index_store_path = server. mappath ("Index"); // index_store_path is the index storage directory.
String keyword = tbsearchcontent. Text; // search for keywords
If (keyword! = "")
{
Hits myhit = NULL;
Indexsearcher mysea = new indexsearcher (index_store_path );
Analyzer analyzer = new standardanalyzer (); // defines the word Divider
Queryparser q = new queryparser ("title and content", analyzer );
Query query1 = Q. parse (keyword );
// Highlight
Booleanquery bquery = new booleanquery ();
Highlighter = new highlighter (New simplehtmlformatter ("<font color =/" Red/">", "</font>"), new queryscorer (query1 )); // use the highlighted keyword to display alternative keywords
Highlighter. settextfragmenter (New simplefragmenter (100 ));
Datetime start = datetime. now;
Myhit = mysea. Search (query1 );
Datetime end = datetime. now;
Long time = end. millisecond-start. millisecond;
This. MSG. innerhtml = "<font size = 2> about <B> <font color = blue>" + keyword + "</font> <B/> found <B> <font color = Red> "+ myhit. length () + "</font> </B>. search Duration: <font color = Red> "+ time +" </font> millisecond. </font> </BR> ";
If (myhit! = NULL)
{
Datarow myrow;
Datatable mytab = new datatable ();
Mytab. Columns. Add ("title ");
Mytab. Columns. Add ("content ");
Mytab. Columns. Add ("link address ");
Mytab. Clear ();
For (INT I = 0; I <myhit. Length (); I ++)
{
Document Doc = myhit. DOC (I );
Myrow = mytab. newrow ();
Myrow [0] = Doc. Get ("title"). tostring ();
Myrow [1] = Doc. Get ("content"). tostring ();
Myrow [2] = Doc. Get ("link address"). tostring ();
Lucene. net. analysis. tokenstream titlestream = analyzer. tokenstream ("title", new system. Io. stringreader (Doc. Get ("title"). tostring ()));
String titleresult = highlighter. getbestfragments (titlestream, Doc. Get ("title"). tostring (), 0 ,"...");
Lucene. net. analysis. tokenstream contentstream = analyzer. tokenstream ("content", new system. Io. stringreader (Doc. Get ("content"). tostring ()));
String contentresult = highlighter. getbestfragments (contentstream, Doc. Get ("content"). tostring (), 0 ,"...");
If (! String. isnullorempty (titleresult ))
{
Myrow [0] = titleresult;
}
If (! String. isnullorempty (contentresult ))
{
Myrow [1] = contentresult;
}
Mytab. Rows. Add (myrow );
Myrow. acceptchanges ();
}
Gridview1.datasource = mytab;
Gridview1.databind ();
Viewstate ["mydatatable"] = mytab;
}
Else
{
Response. Write ("hits is empty ");
}
Mysea. Close ();
}
Else
{
Return;
}
}
// Paging events
Protected void gridview1_pageindexchanging (Object sender, gridviewpageeventargs E)
{
Gridview1.datasource = vsdatatable;
Gridview1.pageindex = E. newpageindex;
Gridview1.databind ();
}
/// <Summary>
/// The datatable stored in viewstate
/// </Summary>
Private datatable vsdatatable
{
Get {return viewstate ["mydatatable"] As datatable ;}
Set {viewstate ["mydatatable"] = value ;}
}
/// <Summary>
/// Common binding materials
/// </Summary>
Private void pagedatabind ()
{
Gridview1.datasource = vsdatatable;
Gridview1.databind ();
}
/// <Summary>
/// Add a page for binding materials
/// </Summary>
/// <Param name = "getpageindex"> new page index </param>
Private void pagedatabind (int32 getpageindex)
{
Gridview1.datasource = vsdatatable;
Gridview1.pageindex = getpageindex;
Gridview1.databind ();
}
Public String getsubstring (string Str)
{
If (Str. length> 200)
STR = Str. substring (0,197) + "...";
Return STR;
}
}
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