using System.Data;
using System.Data.OleDb;

<form id="search" method="post" runat="server">
<TABLE id="Table3" cellSpacing="1" cellPadding="1" width="95%" align="right" border="0">
<TR>
<TD>
<P>&nbsp;</P>
<P>
<asp:Label id="Label1" runat="server">Search Site</asp:Label>
<asp:TextBox id="txtSearch" runat="server"></asp:TextBox>
<asp:Button id="btnSearch" runat="server" Text="Search"></asp:Button><BR>
<BR>
<asp:Label id="lbl" runat="server"></asp:Label></P>
</TD>
</TR>
</TABLE>
</form>

protected System.Web.UI.WebControls.TextBox txtSearch; protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.Button btnSearch;
protected System.Web.UI.WebControls.Label lbl;
public int cnt;
/// <SUMMARY>
/// On the click of button, search for the keyword in the index catalog , and show the matching result on the page /// </SUMMARY>
/// <PARAM name="sender"></PARAM>
/// <PARAM name="e"></PARAM>
private void btnSearch_Click(object sender, System.EventArgs e)
{
// connecting string for connecting index server, In this provider name is MSIDXS ; DataSource is name of the catalog name in the index server.
// create a connection object and command object, to connect the Index Server
System.Data.OleDb.OleDbConnection odbSearch = new System.Data.OleDb.OleDbConnection(); System.Data.OleDb.OleDbCommand cmdSearch = new System.Data.OleDb.OleDbCommand(); 
//assign the connecting string to the oledb connection object , replace Catalog Name with the name of index catalog created earlier
odbSearch.ConnectionString = "Provider=\"MSIDXS\";Data Source=\"[Catalog name]\";";
//assign connection to command object cmdSearch
cmdSearch.Connection = odbSearch;
//Query to search a free text string in the catalog in the contents of the indexed documents in the catalog
try
{
// Make freetext search in the contents and retreive document titles , path , rank from the index catalog
cmdSearch.CommandText = "select doctitle, filename, vpath, rank, characterization from scope() where FREETEXT(Contents, '"+txtSearch.Text +"') and filename <> 'search.aspx' order by rank desc ";
odbSearch.Open();
try
{
OleDbDataReader rdrSearch = cmdSearch.ExecuteReader(); //dg1.DataSource=rdrSearch; //dg1.DataBind(); cnt=1;
lbl.Text="";
// your databinding or display code here
while( rdrSearch.Read())
{
// Call method get pagelink to write process and show the valid link on the page , here we have used getpagelink to show the file name searched
getpagelink(rdrSearch[1].ToString());
}
}
catch(Exception ex)
{
lbl.Text=ex.Message ;
}
odbSearch.Close();
}
catch( SqlException ex)
{
lbl.Text=ex.Message.ToString();
odbSearch.Close();
}
}
/// <SUMMARY>
/// This function creates the link of the searched document in the predefined template.
/// </SUMMARY>
/// <PARAM name="srcfile">This Function is </PARAM>
public void getpagelink(string srcfile)
{
string temp= (cnt).ToString() +".) " + srcfile;
}