ASP. NET 4

1. Exposure exposes the attributes and methods on the template page, and then modifies these attributes and methods on the specific content page.
<% @ Mastertype virtualpath = "" %> Import template page

2. Use the findcontrol method to modify the template page information on the Content Page-master. findcontrol ()

3. dynamically load the template page. First, merge the template page and content page. The template page cannot be dynamically loaded in the load event. The only event that can load the template page is preinit. The first event triggered during the page execution Lifecycle

4. Before using a user, you must register the user first.
<% @ Register tagprefix = "" tagname = "" src = "" %>
Tagprefix -- indicates the namespace associated with the user control on the current page. You can use any string
Tagname -- indicates the name of the user control associated with the current page. You can use any string
SRC -- indicates the virtual path of the User Control