Avoid "The class or CssClass value is not defined" Warnings in ASP.NET MVC ASCX Partial Views (UserControls)

Question

I wondered how I can stop those annoying compiler warnings "The class or CssClass value is not defined" coming from my ASP.NET MVC partial views/ASCX user controls. The CSS is correctly defined, but the reference to the CSS file is obviously on the master page only. My partial views contain lots of CSS class references on div's etc. and so I get massive amounts of warnings which I shouldn't see.

How can I solve this?

Thank you !

Answer 1

Include this in your partial view:

<% if (false) { %>
   <link rel="stylesheet" type="text/css" ...
<% } %>

This will make intellisense happy, and excludes the stylesheet when the page is rendered, so that it is not included twice.

Answer 2

One way is to turn HTML Syntax Checking off (Tools->Options->Text editor->HTML->Show Errors->In CSS).

I use the Firefox Tidy plug in, which gives better advice, IMHO.