MasterPage介绍

  

ASP.NET 2.0 provides a new approach with master pages that comes close to meeting these primary goals. Master pages contain all of the common HTML, server controls, and code that would normally be replicated in some fashion in the application pages. You place one or more content placeholders in the master to reserve the space for page-specific content. Content pages provide the content specific to the page and need only reference the desired master page. When a user requests a content page, ASP.NET merges the output of the master page with the output of the content page, resulting in a page that combines the master page layout with the output of the content page.