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In this video, we will discuss creating a simple image slideshow using jQuery. We will be using setInterval() and clearInterval() JavaScript methods to achieve this. We discussed these functions in detail in Part 34 of JavaScript Tutorial.
When you click “Start Slide Show” button the image slideshow should start and when you click the “Stop Slide Show” button the image slideshow should stop.
For the purpose of this demo we will be using the images that can be found on any windows machine at the following path.
C:UsersPublicPicturesSample Pictures
Here are the steps to create the image slideshow using jQuery
Step 1 : Open Visual Studio and create a new empty asp.net web application project. Name it Demo.
Step 2 : Right click on the Project Name in Solution Explorer in Visual Studio and create a new folder with name = Images.
Step 3 : Copy the images from C:UsersPublicPicturesSample Pictures to Images folder in your project.
Step 4 : Right click on the Project Name in Solution Explorer in Visual Studio and add a new HTML Page. It should automatically add HTMLPage1.htm. Also add a jQuery file.
Step 5 : Copy and paste the following HTML and jQuery code in HTMLPage1.htm page.
<html>
<head>
<style type=”text/css”>
.imgStyle {
width: 100px;
height: 100px;
border: 3px solid grey;
}
</style>
<script src=”jquery-1.11.2.js”></script>
<script type=”text/javascript”>
$(document).ready(function () {
var imageURLs = new Array();
var intervalId;
var btnStart = $(‘#btnStartSlideShow’);
var btnStop = $(‘#btnStopSlideShow’);
$(‘#divId img’).each(function () {
imageURLs.push($(this).attr(‘src’));
});
function setImage() {
var mainImageElement = $(‘#mainImage’);
var currentImageURL = mainImageElement.attr(‘src’);
var currentImageIndex = $.inArray(currentImageURL, imageURLs);
if (currentImageIndex == (imageURLs.length – 1)) {
currentImageIndex = -1;
}
mainImageElement.attr(‘src’, imageURLs[currentImageIndex + 1])
}
btnStart.click(function () {
intervalId = setInterval(setImage, 500);
$(this).attr(‘disabled’, ‘disabled’);
btnStop.removeAttr(‘disabled’);
});
btnStop.click(function () {
clearInterval(intervalId);
$(this).attr(‘disabled’, ‘disabled’);
btnStart.removeAttr(‘disabled’);
}).attr(‘disabled’, ‘disabled’);
});
</script>
</head>
<body style=”font-family:Arial”>
<input id=”btnStartSlideShow” type=”button” value=”Start Slideshow” />
<input id=”btnStopSlideShow” type=”button” value=”Stop Slideshow” />
<br /><br />
<img id=”mainImage” style=”border:3px solid grey”
src=”/Images/Hydrangeas.jpg” height=”500″ width=”540″ />
<br />
<div id=”divId”>
<img class=”imgStyle” src=”/Images/Hydrangeas.jpg” />
<img class=”imgStyle” src=”/Images/Jellyfish.jpg” />
<img class=”imgStyle” src=”/Images/Koala.jpg” />
<img class=”imgStyle” src=”/Images/Penguins.jpg” />
<img class=”imgStyle” src=”/Images/Tulips.jpg” />
</div>
</body>
</html>
