how to create image slidershow .

<table width="679" border="0" align="center" cellpadding="0" cellspacing="0">
                      <tr>
                        <td>
						<div>
                                <table border="0" cellpadding="0" cellspacing="0">
                                <tr>
                                <td>
                                <asp:Image ID="imgslides" runat="server"  width="679" height="205"/> 
                                </td>
                                </tr>
                                </table>
                                <ajax:SlideShowExtender runat="server" AutoPlay="true" ImageTitleLabelID="lblTitle" ImageDescriptionLabelID="lblimgdesc" Loop="true"
                                 
                                TargetControlID="imgslides" SlideShowServicePath="SlideshowH.asmx" SlideShowServiceMethod="GetSlides"></ajax:SlideShowExtender> 
                                </div>
						</td>
                      </tr>                     
                    </table>

<%@ WebService Language="C#" CodeBehind="~/App_Code/SlideshowH.cs" Class="SlideshowH" %>

using System;
using System.Collections;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;

/// <summary>
/// Summary description for Slideshow
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
[System.Web.Script.Services.ScriptService]

public class SlideshowH : System.Web.Services.WebService {

public SlideshowH () {

//Uncomment the following line if using designed components 
//InitializeComponent(); 
}

[System.Web.Services.WebMethod]
[System.Web.Script.Services.ScriptMethod]
public AjaxControlToolkit.Slide[] GetSlides()
{
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["shoppe"].ConnectionString);
SqlCommand cmd = new SqlCommand();
SqlDataAdapter adap = new SqlDataAdapter();
DataSet ds;
cmd = new SqlCommand("select substring(image,4,1000)as image from tbl_panner where page='Home'", con);

adap = new SqlDataAdapter(cmd);
ds = new DataSet();
adap.Fill(ds);

string[] imagenames = System.IO.Directory.GetFiles(Server.MapPath("~/Upload"));
    
//AjaxControlToolkit.Slide[] photos = new AjaxControlToolkit.Slide[imagenames.Length];
AjaxControlToolkit.Slide[] photos = new AjaxControlToolkit.Slide[ds.Tables[0].Rows.Count];

for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
string[] file = imagenames[i].Split('\\');

//photos[i] = new AjaxControlToolkit.Slide("Images/" + file[file.Length - 1], file[file.Length - 1], "");

photos[i] = new AjaxControlToolkit.Slide(ds.Tables[0].Rows[i]["image"].ToString(),"", "");

}
return photos;
}
}