Controling attributes during the design process

Experimenting with a basic User Control in Visual Studio 2008: I've created a Panel called Wrapper with various controls inside. Will Visual Studio be able to handle this during the design phase?

public partial class TestControl : System.Web.UI.UserControl
{
    [Description("Css class of the div around the control.")]
    [CssClassProperty]
    public string CssClass
    {
        get { return Wrapper.CssClass; }
        set { Wrapper.CssClass = value; }
    }
}

Despite setting the CssClass property, the css for the Panel does not update at design time. Is my expectation too high?

cssvisual-studio-2008user-controlsdesign-time

Answer №1

To properly set the CSS style, examine the parent element and perform a casting operation as shown below:

if(this.Parent is Panel)
{
   ((Panel)this.Parent).CssClass = value;
}

Alternatively, you can explore similar solutions.

Answer №2

When it comes to designing pages in the Visual Studio IDE, there can be challenges with CSS loading when content is added through code-behind or a global page header that your site inherits. This can make it difficult to design sub-pages and controls efficiently. Adding CSS directly into your sub-document or control may result in duplicate references to the style sheet in the compiled page.

One workaround is to include arbitrary CSS in the IDE for design purposes only, without affecting debug or run-time functions. By inserting the following code snippet, you can make the CSS available during design time:

<% 
#If 0 Then
%>    
    <link rel='stylesheet' href='mycss.css' type='text/css' />        
<%
#End If
%>

This will ensure that your style sheet is loaded only in the html designer of the IDE.

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