145private void PerformSearch()
146{
147DateTime start = DateTime.Now;
148
149	//Create the Searcher object
150	string strIndexDir = Server.MapPath("index") + "\\" + mstrURL;
151	IndexSearcher objSearcher = new IndexSearcher(strIndexDir); 
152
153	//Parse the query, "text" is the default field to search
154	Query objQuery = QueryParser.Parse(mstrQuery, 
		"text", new StandardAnalyzer()); 
155
156	//Create the result DataTable
157	mobjDTResults.Columns.Add("title", typeof(string));
158	mobjDTResults.Columns.Add("path", typeof(string));
159	mobjDTResults.Columns.Add("score", typeof(string));
160	mobjDTResults.Columns.Add("sample", typeof(string));
161	mobjDTResults.Columns.Add("explain", typeof(string));
162
163	//Perform search and get hit count
164	Hits objHits = objSearcher.Search(objQuery);
165	mintTotal = objHits.Length();
166
167	//Create Highlighter
168	QueryHighlightExtractor highlighter = new 
		QueryHighlightExtractor(objQuery, new 
		StandardAnalyzer(), "<B>", "</B>");
169
170	//Initialize "Start At" variable
171	mintStartAt = GetStartAt();
172
173	//How many items we should show?
174	int intResultsCt = GetSmallerOf(mintTotal, 
		mintMaxResults + mintStartAt);
175
176	//Loop through results and display
177	for (int intCt = mintStartAt; intCt < intResultsCt; intCt++) 
178	{
179	  //Get the document from resuls index
180	  Document doc = objHits.Doc(intCt);
181
182	  //Get the document's ID and set the cache location
183	  string strID = doc.Get("id");
184	  string strLocation = "";
185	  if (mstrURL.Substring(0,3) == "www")
186	    strLocation = Server.MapPath("cache") + 
187	    "\\" + mstrURL + "\\" + strID + ".htm";
188	  else
189	    strLocation = doc.Get("path") + doc.Get("filename");
190
191	  //Load the HTML page from cache
192	  string strPlainText;
193	  using (StreamReader sr = new 
			StreamReader(strLocation, System.Text.Encoding.Default))
194	  {
195	    strPlainText = ParseHTML(sr.ReadToEnd());
196	  }
197
198	  //Add result to results datagrid
199	  DataRow row = mobjDTResults.NewRow();
200	  if (mstrURL.Substring(0,3) == "www")
201	    row["title"] = doc.Get("title");
202	  else
203	    row["title"] = doc.Get("filename");
204	  row["path"] = doc.Get("path");
205	  row["score"] = String.Format("{0:f}", (objHits.Score(intCt) * 100)) + "%";
206	  row["sample"] = highlighter.GetBestFragments(strPlainText, 200, 2, "...");
207	  Explanation objExplain = objSearcher.Explain(objQuery, intCt);
208	  row["explain"] = objExplain.ToHtml();
209	  mobjDTResults.Rows.Add(row);
210	} 
211	objSearcher.Close();
212
213	//Finalize results information
214	mTsDuration = DateTime.Now - start;
215	mintFromItem = mintStartAt + 1;
216	mintToItem = GetSmallerOf(mintStartAt + mintMaxResults, mintTotal);
217}