How to make user controls know about css classes in ASP.NET

user_31505 0
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Since there are no header sections for user controls in asp.net, user controls have no way of knowing about stylesheet files. So css classes in the user controls are not recognized by visual studio and produces warnings. How can I make a user control know that it will relate to a css class, so if it is warning me about a non-existing css class, it means that the class really do not exist?

Edit: Or should I go for a different design like exposing css classes as properties like "HeaderStyle-CssClass" of GridView?

visual-studio-2008 user-controls css asp.net
4 Answers

Here's what I did:

<link rel="Stylesheet" type="text/css" href="Stylesheet.css" id="style" runat="server" visible="false" />

It fools Visual Studio into thinking you've added a stylesheet to the page but it doesn't get rendered.

Here's an even more concise way to do this with multiple references;

<% if (false) { %>
    <link rel="Stylesheet" type="text/css" href="Stylesheet.css" />
    <script type="text/javascript" src="js/jquery-1.2.6.js" />
<% } %>

As seen in this blog post from Phil Haack.

ALassek_12490

If you are creating composite UserControl, then you can set the CSSClass property on the child controls..

If not, then you need to expose properties that are either of the Style type, or (as I often do) string properties that apply CSS at the render type (i.e. take them properties and add a style attribute to the HTML tags when rendering).

Rob_Cooper_8320

You Can use CSS direct in userControl.

Use this in UserControl:

 <head>
    <title></title> 
    <style type="text/css">
      .wrapper {
          margin: 0 auto -142px; 
         /* the bottom margin is the negative value of the footer's height */ 
       }
    </style>
 </head>

This will work.

user_13046340
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