To display the search results in the ASP.NET GridView control instead of SearchResult, you can make use of the DataSet that is returned from the SearchAgent API.
In this example a simple GridView is used with paging enabled.
Eg. ASPX
<%@ Register TagPrefix="searchengine" Namespace="Keyoti.SearchEngine.Web" Assembly="Keyoti4.SearchEngine.Web" %>
<%@ Page language="c#" Inherits="KeyotiSearchDemo_CSharp.Example1_Simple.GridView_Search" CodeFile="gridview-search.aspx.cs" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<html>
<head>
<title>GridView</title>
</head>
<body>
<form id="Form1" method="post" runat="server">
<searchengine:SearchBox ID='SearchBox_NoQuery' runat='server' ResultPageURL='.'>
</searchengine:SearchBox>
<asp:GridView runat="server" ID="gridView1" AllowPaging="True"
onpageindexchanging="gridView1_PageIndexChanging">
</asp:GridView>
</form>
</body>
</html>
CODEBEHIND
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace KeyotiSearchDemo_CSharp.Example1_Simple
{
/// <summary>
/// Summary description for SearchResults.
/// </summary>
public partial class GridView_Search : System.Web.UI.Page
{
protected void Page_Load(object sender, System.EventArgs e)
{
if (Request.Params["QueryExpr"] != null && !IsPostBack)
{
BuildResultData();
}
}
private void BuildResultData()
{
//--Run the search
//Please update this license key if it has expired, using //http://keyoti.com/products/evaluation-key-generator/default.aspx?SKU=SEWEBP.NET
string license = "59546960665C68616A5B6C6B635C53253C3A403C3A40423D443F45444647444B494F4B2";
Keyoti.SearchEngine.Configuration configuration = new Keyoti.SearchEngine.Configuration();
configuration.IndexDirectory = MapPath("~/IndexDirectory");
Keyoti.SearchEngine.Search.SearchAgent searchAgent = new Keyoti.SearchEngine.Search.SearchAgent(license, configuration);
//get results only for requested page
Keyoti.SearchEngine.Search.SearchResult result = searchAgent.Search(Request.Params["QueryExpr"],
1 + (gridView1.PageIndex * gridView1.PageSize), ((gridView1.PageIndex + 1) * gridView1.PageSize));
//need to create a datatable to hold results
DataTable resultTable = new DataTable();
//setup the same columns as came from search agent.
for (int i = 0; i < result.DataSet.Tables[0].Columns.Count; i++)
resultTable.Columns.Add(result.DataSet.Tables[0].Columns[i].ColumnName);
int j = 0;
for (int i = 0; i < result.NumberOfResults; i++)
{
if (i >= gridView1.PageIndex * gridView1.PageSize && i < ((gridView1.PageIndex + 1) * gridView1.PageSize))
{
resultTable.Rows.Add(result.DataSet.Tables[0].Rows[j++].ItemArray);
}
else
resultTable.Rows.Add(new object[result.DataSet.Tables[0].Columns.Count]);//dummy data to fill out results for pagination
}
//bind the results
gridView1.DataSource = resultTable;
gridView1.DataBind();
}
protected void gridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
gridView1.PageIndex = e.NewPageIndex;
BuildResultData();
}
...Designer code
}
}
The BuildResultData method runs the search using SearchAgent. The rest of the code is there to copy the data out the DataTable that came from ‘result’ and put it in a new DataTable. The trick to this part is that the GridView should be bound to a DataTable holding as many rows as there are total results – but for efficiency we use blank rows for data that isn’t visible. This saves the search engine generating results (and summaries) for rows that can’t be seen. |