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In many cases like photo album application or e-commerce website product display page or e-commerce shopping cart we need to display thumbnail image first and then when user click on this image we want to show the full or original image in a popup window. In this article i will explain how one can display a full or enlarge or zoom image from thumbnail image. The output likes below:
To do that here i am using a javascript method which is given below:
function DisplayFullImage(ctrlimg)
{
txtCode = "<HTML><HEAD>"
+ "</HEAD><BODY TOPMARGIN=0 LEFTMARGIN=0 MARGINHEIGHT=0 MARGINWIDTH=0><CENTER>"
+ "<IMG src='" + ctrlimg.src + "' BORDER=0 NAME=FullImage "
+ "onload='window.resizeTo(document.FullImage.width,document.FullImage.height)'>"
+ "</CENTER>"
+ "</BODY></HTML>";
mywindow= window.open ('','image', 'toolbar=0,location=0,menuBar=0,scrollbars=0,resizable=0,width=1,height=1');
mywindow.document.open();
mywindow.document.write(txtCode);
mywindow.document.close();
}
From your aspx page you can use the above javascript method in the following way:
<asp:Image ID="Image1" BorderColor="lightgray" BorderWidth="3px" width="200px" height ="200px" runat="server" ImageUrl = "Images/blue_flower.jpg" onclick="DisplayFullImage(this);"/>
The complete source code to do the example:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Thumbnail_image.aspx.cs" Inherits="Thumbnail_image" %>
<!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>Thumbnail to original image size</title>
<script type="text/javascript">
function DisplayFullImage(ctrlimg)
{
txtCode = "<HTML><HEAD>"
+ "</HEAD><BODY TOPMARGIN=0 LEFTMARGIN=0 MARGINHEIGHT=0 MARGINWIDTH=0><CENTER>"
+ "<IMG src='" + ctrlimg.src + "' BORDER=0 NAME=FullImage "
+ "onload='window.resizeTo(document.FullImage.width,document.FullImage.height)'>"
+ "</CENTER>"
+ "</BODY></HTML>";
mywindow= window.open ('','image', 'toolbar=0,location=0,menuBar=0,scrollbars=0,resizable=0,width=1,height=1');
mywindow.document.open();
mywindow.document.write(txtCode);
mywindow.document.close();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Image ID="Image1" BorderColor="lightgray" BorderWidth="3px" width="200px" height ="200px" runat="server" ImageUrl = "Images/blue_flower.jpg" onclick="DisplayFullImage(this);"/>
</div>
</form>
</body>
</html>
Hope now you can enlarge zoom original image from a thumbnail image. Run the above page by modifying image url. The page will display a thumbnail image of size 200*200. Now click on the thumbnail image will popup a window to display the full original size image.
Script tested for:
1. Internet Explorer
2. Mozilla Firefox
3. Opera
4. Google Chrome
1 comments:
Hi,
Thanks for this wonderful solution;
But how do I modify the code if the image is from a database table; say for example an sql server database table.
Thank u.
Emmao
I WOULD BE DELIGHTED TO HEAR FROM YOU