<asp:Panel ID="Panel1" runat="server">
            <asp:Label ID="lblImgTitle" runat="server"></asp:Label>
            <asp:Image ID="imgShowImage" runat="server" 
                Height="300"
                Style="border: 1px solid black;width:auto" 
                AlternateText="" />
            
            <asp:Label runat="server" ID="lblImage"/><br /><br />
            <asp:Button runat="server" ID="prevButton" Text="Prev" Font-Size="Larger" />
            <asp:Button runat="server" ID="playButton" Text="Play" Font-Size="Larger" />
            <asp:Button runat="server" ID="nextButton" Text="Next" Font-Size="Larger" />
            
            <cc1:SlideShowExtender ID="slideshowextend1" runat="server"
                ImageTitleLabelID="lblImgTitle" 
                TargetControlID="imgShowImage"
                SlideShowServiceMethod="GetSlides" 
                AutoPlay="true" 
                ImageDescriptionLabelID="lblImage"
                NextButtonID="nextButton" 
                PlayButtonText="Play" 
                StopButtonText="Stop"
                PreviousButtonID="prevButton" 
                PlayButtonID="playButton" 
                Loop="true"
                ContextKey="false"/>

        </asp:Panel>

public partial class Accomodations_Default2 : System.Web.UI.Page
{
    private static DataTable photoSlides = new DataTable();

    protected void Page_Load(object sender, EventArgs e)
    {
        if (this.IsPostBack)
           return;
            int AccId = Convert.ToInt32(Request.QueryString.Get("Id"));
            //get the slides for the slideshow from the database
            //start with declaring variables and parameters
            DataTable photoSlides;
            SqlDataReader myReader;
            SqlParameter AccIdParam;
            SqlConnection myCon = new SqlConnection();
            //create connection
            myCon.ConnectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;

            SqlCommand myCommand = new SqlCommand();
            myCommand.CommandText =
                "SELECT ToolTip, Description, PhotoUrl FROM Photo2 WHERE (ExternalId = @ExtId) AND (PhotoType = 'Accomodation')";
            myCommand.CommandType = CommandType.Text;
            myCommand.Connection = myCon;

            AccIdParam = new SqlParameter();
            AccIdParam = new SqlParameter();
            AccIdParam.ParameterName = "@ExtId";
            AccIdParam.SqlDbType = SqlDbType.Int;
            AccIdParam.Size = 32;
            AccIdParam.Direction = ParameterDirection.Input;
            AccIdParam.Value = AccId;

            myCommand.Parameters.Add(AccIdParam);

            myCommand.Connection.Open();
            myReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection);

            photoSlides = new DataTable();
            photoSlides.Load(myReader);

            // set the initial image
            if (photoSlides.Rows.Count > 0)
            {
                imgShowImage.ImageUrl = photoSlides.Rows[0]["PhotoUrl"].ToString();
            }
            GridView1.DataSource = photoSlides;
            GridView1.DataBind();
        }

    [System.Web.Services.WebMethod]
    [System.Web.Script.Services.ScriptMethod]
    public static AjaxControlToolkit.Slide[] GetSlides()
    {
        //AjaxControlToolkit.Slide[] slides = new AjaxControlToolkit.Slide[3];

        //slides[0] = new AjaxControlToolkit.Slide("../Images/KANO.JPG", "Ascent", "Cool moon night...");
        //slides[1] = new AjaxControlToolkit.Slide("../Images/KANO2.JPG", "Desert", "Red moon desert...");
        //slides[2] = new AjaxControlToolkit.Slide("../Images/KANO3.JPG", "Tulips", "Beautiful tulips...");

        AjaxControlToolkit.Slide[] slides = new AjaxControlToolkit.Slide[photoSlides.Rows.Count];

        for (int i = 0; i < photoSlides.Rows.Count; i++)
        {
            DataRow dr = photoSlides.Rows[i];
            slides[i] = new AjaxControlToolkit.Slide(
                dr["PhotoUrl"].ToString(),
                dr["ToolTip"].ToString(),
                dr["Description"].ToString());
        }
        return slides;
    }
}