Best option to edit CSS file on-the-fly under MVC2 - asp.net-mvc-2

Question

I have an application that in the admin area there is options such as
Background image: [ File Upload ]
Top Illustration: [ File Upload ]
and in the front end I want to easily attach this info to the CSS, maybe teh simply way should be
.background {
background: url(<%: Model.BackgroundUrl %>);
...
}
I currently have my Css files unde ~/Content/Css
shall I have a View with this and change the content type so I can use the Model part?
What other techniques are available or this situation?
Thank you.

Answer 1

You cannot use the model in a static CSS file. If you want to achieve this you will need to generate it dynamically using a controller action. As an alternative you could directly use an img tag:
<img src="<%: Model.BackgroundUrl %>" alt="" />

Answer 2

I ended up doing a new View and set all up as:
in the Master Template
<link href="<%= Url.Content(
String.Format("~/{0}/Css/CustomCss.aspx",
ViewData["CalendarUrl"])) %>"
rel="stylesheet" type="text/css" />
in the Routes
routes.MapRoute(
"CustomCss", // Route name
"{calurl}/Css/CustomCss.aspx", // URL with parameters
new { calurl = "none", controller = "Content", action = "CustomCss", id = UrlParameter.Optional } // Parameter defaults
);
in the Controller: Content, Action: CustomCss
// GET: /Css/CustomCss
public ActionResult CustomCss(string calurl)
{
return View();
}
in my View (placed in Shared):
<%# Page Language="C#" Inherits="System.Web.Mvc.ViewPage<dynamic>"
ContentType="text/css" %>
<%
string company_logo = ViewData["CompanyLogo"] as string;
string company_bkg = ViewData["CompanyBackground"] as string;
%>
.background {
<%if (!String.IsNullOrWhiteSpace(company_bkg))
{ %>background-image:url('<%: company_bkg %>');<%} %>
}
#header-content{
<%if (!String.IsNullOrWhiteSpace(company_logo ))
{ %>background-image:url('<%: company_logo %>');<%} %>
}