Question

Dynamically resizing multiple iFrames based on content

Asked by: NCCEd01

I have multiple iFrames containing dynamically resizing content (the content being from the same domain).

I want to create a script that adjusts the height of the iFrame each time the content changes. As this is for multiple iFrames I also want to be able to pass in the ID of the iFrame to the script.

I have adapted code suggested by 'Zvonko' in the following question, but have had no luck:

http://www.experts-exchange.com/Programming/Languages/Scripting/JavaScript/Q_23706319.html?sfQueryTermInfo=1+dynam+height+ifram+javascript


My code as it currently stands is below.

Any suggestions?

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
	<head id="Head1" runat="server">
		<title>File Upload Control Test</title>
		<script type="text/javascript">        
			function resize(frameid)
			{
				var theFrame = window.frames[frameid];
				var theBody = theFrame.document.body;
				
				theFrame.frameElement.style.height = theBody.scrollHeight;
				theFrame.frameElement.style.width = theBody.scrollWidth;
			}
		</script>
	</head>
	<body>
		<form id="form" runat="server">
			<asp:ScriptManager ID="ScriptManager" runat="server" />
			<div>
				<asp:UpdatePanel ID="UpdatePanel" runat="server">
					<ContentTemplate>
						<h3>iFrame 1</h3>
						<asp:Panel ID="pnlIFrame1" runat="server">
							<iframe id="iframe1" name="iframe1" src="default2.aspx?mode=iframe&prog=S1&mod=S1" onload="resize('iframe1');" scrolling="no" marginwidth="0" marginheight="0" style="overflow:visible; width:500px; display:none" frameborder="0">
								Your browser does not support iframes
							</iframe>
						</asp:Panel>
						<h3>iFrame 2</h3>
						<asp:Panel ID="pnlIFrame2" runat="server">
							<iframe id="iframe2" name="iframe2" src="default2.aspx?mode=iframe&prog=S2&mod=S2" onload="resize('iframe2');" scrolling="no" marginwidth="0" marginheight="0" style="overflow:visible; width:500px; display:none" frameborder="0">
								Your browser does not support iframes
							</iframe>
						</asp:Panel>
						<h3>iFrame 3</h3>
						<asp:Panel ID="pnlIFrame3" runat="server">
							<iframe id="iframe3" name="iframe3" src="default2.aspx?mode=iframe&prog=S3&mod=S3" onload="resize('iframe3');" scrolling="no" marginwidth="0" marginheight="0" style="overflow:visible; width:500px; display:none" frameborder="0">
								Your browser does not support iframes
							</iframe>
						</asp:Panel>
						<h3>iFrame 4</h3>
						<asp:Panel ID="pnlIFrame4" runat="server">
							<iframe id="iframe4" name="iframe4" src="default2.aspx?mode=iframe&prog=S4&mod=S4" onload="resize('iframe4');" scrolling="no" marginwidth="0" marginheight="0" style="overflow:visible; width:500px; display:none" frameborder="0">
								Your browser does not support iframes
							</iframe>
						</asp:Panel>
					</ContentTemplate>
				</asp:UpdatePanel>
			</div>
		</form>
	</body>
</html>

                                  
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Asked On
2009-09-16 at 03:36:28ID24735810
Tags

Javascript

,

iFrame

,

Dynamic

,

Resize

,

Content

,

Dynamically

,

Resizing

,

ASP.NET

,

ASP.NET AJAX

,

AJAX

Topics

JavaScript

,

Asynchronous Javascript and XML (AJAX)

,

Programming for ASP.NET

Participating Experts
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Points
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Comments
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Answers

 

by: AfricansPosted on 2009-09-16 at 03:40:41ID: 25343951

 

by: NCCEd01Posted on 2009-09-16 at 06:26:53ID: 25345313

This seems to work fine in IE7, but doesn't in Firefox, Chrome or Safari.

It seems to fall over on obtaining the value from 'document.frames[iframe.id].document.body.scrollHeight;'

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>File Upload Control Test</title>
 
<script type="text/javascript">
function resize(iframe)
{
	iframe.height = document.frames[iframe.id].document.body.scrollHeight;
}
</script>
</head>
    
<body>
<form id="form" runat="server">
<asp:ScriptManager ID="ScriptManager" runat="server" />
<div>
<asp:UpdatePanel ID="UpdatePanel" runat="server">
<ContentTemplate>
<h3>iFrame 1</h3>
<asp:Panel ID="pnlIFrame1" runat="server">
<iframe id="iframe1" name="iframe1" src="default2.aspx?mode=iframe&prog=S1&mod=S1" onload="resize(this)" scrolling="no" marginwidth="0" marginheight="0" frameborder="0" height="0" width="500">
	Your browser does not support iframes
</iframe>
</asp:Panel>
 
<h3>iFrame 2</h3>
<asp:Panel ID="pnlIFrame2" runat="server">
<iframe id="iframe2" name="iframe2" src="default2.aspx?mode=iframe&prog=S2&mod=S2" onload="resize(this)" scrolling="no" marginwidth="0" marginheight="0" frameborder="0" height="0" width="500">
	Your browser does not support iframes
</iframe>
</asp:Panel>
 
<h3>iFrame 3</h3>
<asp:Panel ID="pnlIFrame3" runat="server">
<iframe id="iframe3" name="iframe3" src="default2.aspx?mode=iframe&prog=S3&mod=S3" onload="resize(this)" scrolling="no" marginwidth="0" marginheight="0" frameborder="0" height="0" width="500">
	Your browser does not support iframes
</iframe>
</asp:Panel>
 
<h3>iFrame 4</h3>
<asp:Panel ID="pnlIFrame4" runat="server">
<iframe id="iframe4" name="iframe4" src="default2.aspx?mode=iframe&prog=S4&mod=S4" onload="resize(this)" scrolling="no" marginwidth="0" marginheight="0" frameborder="0" height="0" width="500">
	Your browser does not support iframes
</iframe>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>

                                              
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by: NCCEd01Posted on 2009-09-16 at 08:18:54ID: 25346551

Hi,

Turns out that document.frames is Internet Explorer only. window.frames apparently works but I still had some trouble with Firefox. In the end I used document.getElementById(frame.id).contentWindow like so:

<script type="text/javascript">
function resize(iframe)
{
	iframe.height = document.getElementById(iframe.id).contentWindow.document.body.scrollHeight;
}
</script>

                                              
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by: NCCEd01Posted on 2009-09-16 at 08:20:29ID: 31629346

Solution provided worked in IE but not in other browsers.

20120131-EE-VQP-002

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