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Asked: 2026-05-10T13:51:26+00:00

I’m working on a website that will switch to a new style on a

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I’m working on a website that will switch to a new style on a set date. The site’s built-in semantic HTML and CSS, so the change should just require a CSS reference change. I’m working with a designer who will need to be able to see how it’s looking, as well as a client who will need to be able to review content updates in the current look as well as design progress on the new look.

I’m planning to use a magic querystring value and/or a javascript link in the footer which writes out a cookie to select the new CSS page. We’re working in ASP.NET 3.5. Any recommendations?

I should mention that we’re using IE Conditional Comments for IE8, 7, and 6 support. I may create a function that does a replacement:

<link href="Style/<% GetCssRoot() %>.css" rel="stylesheet" type="text/css" /> <!--[if lte IE 8]>     <link type="text/css" href="Style/<% GetCssRoot() %>-ie8.css" rel="stylesheet" /> <![endif]--> <!--[if lte IE 7]>     <link type="text/css" href="Style/<% GetCssRoot() %>-ie7.css" rel="stylesheet" /> <![endif]--> <!--[if lte IE 6]>     <link type="text/css" href="Style/<% GetCssRoot() %>-ie6.css" rel="stylesheet" /> <![endif]-->
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1 Answer

  1. In Asp.net 3.5, you should be able to set up the Link tag in the header as a server tag. Then in the codebehind you can set the href property for the link element, based on a cookie value, querystring, date, etc.

    In your aspx file:

    <head>   <link id='linkStyles' rel='stylesheet' type='text/css' runat='server' /> </head>

    And in the Code behind:

    protected void Page_Load(object sender, EventArgs e) {   string stylesheetAddress = // logic to determine stylesheet   linkStyles.Href = stylesheetAddress; }
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