Question

I have two pages, let’s call them “receipts.com” and “business.receipts.com”. Both link to a page on a different domain via Response.Redirect(“http://receipts2.com/default.aspx?mode=”)
where the “mode”-parameter is the referring page.

The recieving page should look in the query string, and choose a different CSS class according to the “mode”-parameter.

How is this accomplished? And is this the right way to do it?

Answer 1

Instead of swapping class names you can use the same class and different stylesheets.
There are two ways to handle stylesheets: client side and server side.

On the client side, you can parse the query string and disable stylesheets using: (document.getElementsByTagName("link")[i]).disabled = true;

On the server side, you can use themes or simply add a placeholder around the style declarations and show/hide them using codebehind that looks at Response.QueryString["mode"]:

<asp:PlaceHolder ID="placeHolder1" runat="server" Visible="false">
   <link rel="stylesheet" href="/alternate.css" media="all" />
</asp:PlaceHolder>

and code behind in a master page somewhere:

if(Response.QueryString["mode"] == "blah")
{
  placeHolder1.Visible = true;
}