AJAX SlideShowおよびTreeViewコントロールを使用してスライドショーを作成する

<?xml version="1.0" encoding="utf-8"?>
<ArrayOfSlide xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
              xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
              xmlns="http://MYDOMAINHERE.com/">
    <Slide>
        <ImagePath>/images/images_15seconds.jpg</ImagePath>
        <Name> images_15seconds</Name>
        <Description />
    </Slide>
    <Slide>
        <ImagePath>/images/ images_Blue hills.jpg</ImagePath>
        <Name> images_Blue hills</Name>
        <Description />
    </Slide>
    <Slide>
        <ImagePath>/images/ images_Sunset.jpg</ImagePath>
        <Name> images_Sunset</Name>
        <Description />
    </Slide>
    <Slide>
        <ImagePath>/images/ images_Water lilies.jpg</ImagePath>
        <Name> images_Water lilies</Name>
        <Description />
    </Slide>
    <Slide>
        <ImagePath>/images/ images_Winter.jpg</ImagePath>
        <Name> images_Winter</Name>
        <Description />
    </Slide>
</ArrayOfSlide>

[WebMethod]
public AjaxControlToolkit.Slide[] GetSlides(String contextKey)
{
    return null;
}

<add key="SlideServiceNoImagesFoundLocation" 
     value="NoImagesFound.jpg"/>
<add key="SlideServiceValidImageExtensions" value="jpg,gif,bmp,ico"/>

private AjaxControlToolkit.Slide[] GetNoImagesFoundDirectory()
{
    AjaxControlToolkit.Slide[] slides = new AjaxControlToolkit.Slide[1];

    // get image from web.config and verify it exists on file system
    _noImagesFoundWebLocation
      = System.Configuration.ConfigurationSettings.AppSettings.Get(
                                "SlideServiceNoImagesFoundLocation");
    if (!File.Exists(Server.MapPath(_noImagesFoundWebLocation)))
       throw new Exception("SlideService.asmx::
        GetNoImagesFoundDirectory - NoImagesFoundLocation found in 
        web.config does not exist after server.mappath - " 
        + Server.MapPath(_noImagesFoundWebLocation));

    // create slide from image
    slides[0] = new AjaxControlToolkit.Slide(
      _noImagesFoundWebLocation, 
      "No Images Found: Please click on another directory", "");

        // return slide
        return (slides);
    }

[WebMethod]
public AjaxControlToolkit.Slide[] GetSlides(String contextKey)
{
    // get valid extensions
    GetImageExtensionsFromWebConfig();

    // contextKey not empty
    if (String.IsNullOrEmpty(contextKey))
        return null;

    // contextKey in scope
    if ((contextKey.IndexOf("..")>=0))
        return null;

    // verify contextKey directory exists
    String mapPath = Server.MapPath(contextKey);
    if (!Directory.Exists(mapPath))
        throw new Exception(
           "SlideService.asmx::GetSlides - mapPath does not exist - "
            + Server.MapPath(mapPath));

    // get files in contextKey directory
    string[] fileNames = System.IO.Directory.GetFiles(mapPath);
    if (fileNames.Length == 0)
        return GetNoImagesFoundDirectory();

    // create generic empty list of slides
    List<AjaxControlToolkit.Slide> list
       = new List<AjaxControlToolkit.Slide>();
    String justFileName;
    String displayedFileTitleOnSlider;
    String displayedFileDescriptionOnSlider;

    for (int i = 0; i < fileNames.Length; i++)
    {
        if(IsImage(Path.GetExtension(fileNames[i])))
        {
            // get complete filename
            justFileName = Path.GetFileName(fileNames[i]);

            // get title
            displayedFileTitleOnSlider
              = Path.GetFileNameWithoutExtension(fileNames[i]);

            // set description to empty
            displayedFileDescriptionOnSlider = String.Empty;

            // add file to list of slides
            list.Add(new AjaxControlToolkit.Slide(contextKey
               + justFileName, displayedFileTitleOnSlider, 
                     displayedFileDescriptionOnSlider));
        }
    }
    return (list.ToArray());
}

String _noImagesFoundWebLocation; //path and file of the image 
                                  //containing "No Images Found" text
String _arrayOfImageExtensions; //string of valid image file 
                                //extensions without "." in the 
                                //value ex "jpg,gif"
String[] _extensionList; //string array of valid image file extensions
                         // without "." and with comma removed

using System.Web.UI.WebControls;
using System.Diagnostics;
using System.IO;
using System.Configuration;
using System.Collections.Generic;

[System.Web.Script.Services.ScriptService()]

<Slide>
    <ImagePath>/images/Blue hills.jpg</ImagePath>
    <Name>Blue hills</Name>
    <Description />
</Slide>

<asp:ScriptManager ID="ScriptManager1" runat="server" />

<asp:TreeView ID="TreeView1" runat="server">
</asp:TreeView>

<asp:TreeView ID="TreeView1" runat="server"
    ExpandDepth=1
    ShowExpandCollapse=true
    OnSelectedNodeChanged="TreeView1_OnSelectedNodeChanged"
    PathSeparator="|"
    EnableViewState=true
    SelectedNodeStyle-Font-Bold=true
    SelectedNodeStyle-ForeColor=red
/>

<asp:Image ID="imgPhotos" runat="server" Height="300" 
     Style="width:auto; border:solid 1px #000000;" />

<cc1:SlideShowExtender ID="SlideShowExtender1" runat="server">
</cc1:SlideShowExtender>

<cc1:SlideShowExtender ID="SlideShowExtender1" runat="server"
    TargetControlID="imgPhotos"
    SlideShowServiceMethod="GetSlides"
    SlideShowServicePath="/SlideService.asmx"
    ContextKey="images/"
    UseContextKey=true
    AutoPlay="true"
    NextButtonID="btnNext"
    PlayButtonText="Play"
    StopButtonText="Stop"
    PreviousButtonID="btnPrev"
    PlayButtonID="btnPlay"
    Loop="true"
    ImageTitleLabelID=lblTitle
    ImageDescriptionLabelID=lblDescription
/>

<center><asp:Label ID="lblTitle" runat=server></asp:Label>
</center><br />
<asp:Label ID="LabelTreeSelectedNode" runat=server></asp:Label><br />
<asp:Label ID="LabelClickthroughURL" runat=server></asp:Label><br />
<asp:Label ID="lblDescription" runat=server></asp:Label><br />
<center>
<asp:Button ID="btnPrev" Text="Prev" runat="server" />
<asp:Button ID="btnPlay" Text="Play" runat="server" />
<asp:Button ID="btnNext" Text="Next" runat="server" />
</center>

    using System.IO;

protected void Page_Load(object sender, EventArgs e)
{
    GetWebConfigSettings();
    VerifyDirectoriesAndFiles();

    // SET first image
    imgPhotos.ImageUrl = _slideShowDefaultLocation
                       + _slideShowDefaultLocationFirstPicture;
    imgPhotos.AlternateText = _slideShowDefaultLocation 
                            + _slideShowDefaultLocationFirstPicture;

    // set web service path
    SlideShowExtender1.SlideShowServicePath
        = _slideShowWebServiceLocation;
    SlideShowExtender1.ContextKey = _slideShowDefaultLocation;

    // don't add copy of tree to tree on postback
    if (TreeView1.Nodes.Count == 0)
        PopulateTree();


    // Set From QueryString or ViewState
    if ((!String.IsNullOrEmpty(_currentTreePathQueryStringName)) 
       && ((Request[_currentTreePathQueryStringName] != null) 
       || (ViewState[_currentTreePathQueryStringName] != null)))
            SelectNodeBasedOnQueryStringOrViewState();
    // else assume first time to page
    else
    {
        // first time to page
        if (!String.IsNullOrEmpty(_slideShowDefaultLocation))
        {
            ExpandTreePathByDirPath();
        }
    }

    // set labels so that selected info is visible on page
    //LabelTreeSelectedNode.Text = 
    //"<b>SlideShowExtender1.ContextKey:</b>" 
    //+ SlideShowExtender1.ContextKey;
    if (String.IsNullOrEmpty(LabelClickthroughURL.Text))
    {
        LabelClickthroughURL.Text
           = "<a href='mailto:?subject=Picture SlideShow from the 
             Berrys&Body=" + HttpContext.Current.Request.Url + "?" 
           + _currentTreePathQueryStringName + "=" 
           + Server.UrlEncode(_slideShowDefaultLocation) 
           + "'>Send link to this page by email</a><br>";
        }
    }

protected void TreeView1_OnSelectedNodeChanged(object sender, 
                                               EventArgs e)
{
    // DFB: Get Location of Node Selected used by TreeView 
    // to find a node
    _currentTreePath = TreeView1.SelectedNode.ValuePath;
    //lblDescription.Text = "<b>Selected ValuePath :</b>" 
    //+ _currentTreePath ;

    // DFB: Get Location of web Directory
    SlideShowExtender1.ContextKey = TreeView1.SelectedNode.Value;
    //LabelTreeSelectedNode.Text = "<b>SlideShowExtender1.ContextKey:
    //</b> " + SlideShowExtender1.ContextKey +
    // "<br><b>Server.MapPath(ContextKey)</b>:" 
    //+ Server.MapPath(SlideShowExtender1.ContextKey);

    // DFB: If Path is not empty, add it to state so we have it 
    //on postback
    if (!String.IsNullOrEmpty(_currentTreePath))
    {
        ViewState.Add(_currentTreePath, _currentTreePath);

        LabelClickthroughURL.Text
           = "<a href='mailto:?subject=Picture SlideShow from the 
             Berrys&Body=" + HttpContext.Current.Request.Url + "?" 
           + _currentTreePathQueryStringName + "=" 
           + Server.UrlEncode(_currentTreePath) 
           + "'>Send link to this page by email</a><br>";
    }
}