In this article, We will see how to make a image slideshow in ASP.NET. We will use the JavaScript of this slideshow.We will use generic handler for thumbnail image.Generic Handler use for page implementing.

This code is aspx:-

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head runat="server">
 <title>SlideShow</title>
 <meta http-equiv="content-type" content="text/html; charset=utf-8" />
 <meta name="keywords" content="SlideShow, Visual Slideshow, Web Slide Show, Free Slideshow Creator"
/>
 <meta name="description" content="SlideShow created with Visual Slideshow, a free wizard program that helps you easily generate beautiful web slideshow" />
 <link rel="stylesheet" type="text/css" href="engine/css/slideshow.css" media="screen" />
 <style type="text/css">
 .slideshow a#vlb
 {
display: none;
}
</style>
 </head>
<body>
 <form id="form1" runat="server">
 <script type="text/javascript">
 function OpenPopup() {
window.open("ImageUpload.aspx", "List", "scrollbars=yes,resizable=no,width=500,height=300";
return false;
}
</script>
 <script type="text/javascript" src="engine/js/mootools.js"></script>
 <script type="text/javascript" id="allcode" src="engine/js/visualslideshow.js"></script>
 <table>
 <tr>
 <td align="left" valign="top">
 <asp:Button runat="server" ID="UploadButton" Text="Upload" OnClick="UploadButton_Click"/>
 </td>
 </tr>
 </table>
 <div id="show" class="slideshow">
 <div class="slideshow-images" id="Show">
 <asp:DataGrid ID="DataGridImage" runat="server" AutoGenerateColumns="false">
 <Columns>
 <asp:TemplateColumn>
 <ItemTemplate>
 <a href='<%# getHREF(Container.DataItem)%>'>
 <img align="middle" border="0" id="imgRM"
src='ImageResizeGeneralHandler.ashx?img=<%# getSRC(Container.DataItem) %>&sz=250' /></a>
 </ItemTemplate>
 </asp:TemplateColumn>
 </Columns>
 </asp:DataGrid>
 </div>
 <div class="slideshow-thumbnails">
 <ul>
 <asp:DataGrid ID="DataGridThumbnail" runat="server" AutoGenerateColumns="False"
ShowHeader="False">
 <Columns>
 <asp:TemplateColumn>
 <ItemTemplate>
 <li><a href='<%# getHREF1(Container.DataItem)%>'>
 <img align="middle" border="0" id="imgRM1"
src='ImageResizeGeneralHandler.ashx?img=<%# getSRC1(Container.DataItem)%>&sz=60' /></a>
 </li>
 </ItemTemplate>
 </asp:TemplateColumn>
 </Columns>
 </asp:DataGrid>
 </ul>
 </div>
 </div>
 </form>
 </body>
</html>

This code is .cs:-

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Diagnostics;
using System.IO;
using System.Data;
using System.Xml;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.UploadButton.Attributes.Add("onclick", "javascript:return OpenPopup()");
}
DataSet objDataSet = new DataSet();
objDataSet.ReadXml(Server.MapPath("ImageXMLFile.xml"));
DataGridImage.DataSource = objDataSet;
DataGridImage.DataBind();
DataSet objDataSet1 = new DataSet();
objDataSet1.ReadXml(Server.MapPath("ImageXMLFile.xml"));
DataGridThumbnail.DataSource = objDataSet1;
DataGridThumbnail.DataBind();
string FileName = Server.MapPath("ImageXMLFile.xml");
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(FileName);
XmlNodeList xmlnode = xmlDoc.GetElementsByTagName("CreateDate");
int TotalImage = xmlnode.Count;
int i = 10;
foreach (XmlNode node in xmlnode)
{
for (i = 10; i <= TotalImage; i++)
{
XmlElement xmlElement = xmlDoc.DocumentElement;
XmlNodeList FirstImage = xmlElement.ChildNodes;
DataSet dataset = new DataSet();
dataset.ReadXml(Server.MapPath("ImageXMLFile.xml"));
DataGridImage.DataSource = dataset.Tables[0];
}
}
}
protected void UploadButton_Click(object sender, EventArgs e)
{
Response.Redirect("ImageUpload.aspx");
}
public string getHREF(object sURL)
{
DataRowView dRView = (DataRowView)sURL;
return ResolveUrl("~/data/images/" + dRView["ImageName"].ToString());
}
public string getSRC(object imgSRC)
{
DataRowView dRView = (DataRowView)imgSRC;
if (dRView["CreateDate"].ToString() != "")
{
return ResolveUrl("~/data/images/" + dRView["ImageName"].ToString());
}
else
 {
return ResolveUrl("~/data/images/1.jpg");
}
}
public string getHREF1(object sURL)
{
DataRowView dRView = (DataRowView)sURL;
return ResolveUrl("~/data/thumbnails/" + dRView["ThumbnailsImageName"].ToString());
}
public string getSRC1(object imgSRC)
{
DataRowView dRView = (DataRowView)imgSRC;
if (dRView["CreateDate"].ToString() != "")
{
return ResolveUrl("~/data/thumbnails/" + dRView["ThumbnailsImageName"].ToString());
}
else
 {
return ResolveUrl("~/data/thumbnails/1.jpg");
}
}
}

Output:-

slideshow1.bmp

We can use more than image this slide show and image upload and save the data folder.So,Click the upload button and open the new window for image upload.

Output:-

slideshow2.bmp

I hope you like this article. I am using JavaScript in this article.So,open the zip file.