ASP.NET 4 Unleashed

Applying Themes Dynamically

You might want to enable each user of your website to customize the appearance of your website by selecting different Themes. Some website users might prefer a green Theme, and other website users might prefer a pink Theme.

You can dynamically apply a Theme to a page by handling the Page PreInit event. This event is the first event raised when you request a page. You cannot apply a Theme dynamically in a later event such as the Page Load or PreRender events.

For example, the page in Listing 6.18 applies either the Green Theme or the Pink Theme to the page depending on which link you click in the page body (see Figure 6.8).

Figure 6.8. Selecting a Theme programmatically.

Listing 6.18. DynamicTheme.aspx

A particular ...