照片的提供通过后端Web Services来完成，可通过SlideShowServiceMethod 属性指定要提供照片的Web Method(或Page Method)名称，该Web Method声明的方式如下：

    <System.Web.Services.WebMethod()> _

    <System.Web.Script.Services.ScriptMethod()> _

    Public Shared Function GetSlides() As AjaxControlToolkit.Slide()

        Dim pic(2) As AjaxControlToolkit.Slide

        '图象来源

        pic(0) = New AjaxControlToolkit.Slide("照片位置URL", "照片名称", "照片说明")

        pic(1) = New AjaxControlToolkit.Slide("...", "...", "...")

        pic(2) = New AjaxControlToolkit.Slide("...", "...", "...")

              ...

        Return pic

End Function

然后加一个图片按钮，再加几个如上一张，下一张等的按钮
    <asp:Button ID="btn_Prev" runat="server" Text="上一张" />&nbsp;<asp:Button ID="btn_play"
                runat="server" Text="播放" />
            <asp:Button ID="btn_next" runat="server" Text="下一张" />&nbsp; 图片说明：<asp:Label ID="Label1"
                runat="server" Text="Label"></asp:Label><br />
            <asp:Image ID="Image1" runat="server" /><br />
            <cc1:SlideShowExtender ID="SlideShowExtender1" runat="server" TargetControlID="Image1">
            </cc1:SlideShowExtender>

web服务的设置
'提供图象来源的Web Services
    <System.Web.Services.WebMethod()> _
    <System.Web.Script.Services.ScriptMethod()> _
    Public Shared Function GetSlides() As AjaxControlToolkit.Slide()
        Dim pic(3) As AjaxControlToolkit.Slide
        '图象来源
        pic(0) = New AjaxControlToolkit.Slide("images/airplant.gif", "airplant.gif", "飞机")
        pic(1) = New AjaxControlToolkit.Slide("images/spiderman3.jpg", "spiderman3.jpg", "蜘蛛人")
        pic(2) = New AjaxControlToolkit.Slide("images/superMan.gif", "superMan.gif", "超人")
        pic(3) = New AjaxControlToolkit.Slide("images/batman.jpg", "batman.jpg", "蝙蝠侠")
        Return pic
    End Function
后台逻辑编码
 

 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        '要附挂在哪一个控件上
        Me.SlideShowExtender1.TargetControlID = Me.Image1.ID
        '后端Web Method名称
        Me.SlideShowExtender1.SlideShowServiceMethod = "GetSlides"
        '自动播放
        Me.SlideShowExtender1.AutoPlay = True
        '自动重复
        Me.SlideShowExtender1.Loop = True
        '播放间隔(每张相片显示时间)
        Me.SlideShowExtender1.PlayInterval = 3000
        '下一张相片钮
        Me.SlideShowExtender1.NextButtonID = Me.btn_next.ID
        '上一张相片钮
        Me.SlideShowExtender1.PreviousButtonID = Me.btn_Prev.ID
        '播放/停止钮
        Me.SlideShowExtender1.PlayButtonID = Me.btn_play.ID
        '播放/停止钮在播放时显示的文字
        Me.SlideShowExtender1.StopButtonText = "停止"
        '播放/停止钮在停止时显示的文字
        Me.SlideShowExtender1.PlayButtonText = "播放"
        '图片说明LabelID
        Me.SlideShowExtender1.ImageDescriptionLabelID = Label1.ID
    End Sub

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
        Me.SlideShowExtender1.PlayInterval = 1000
    End Sub