ASP.NET 4 Unleashed

Using Partial Page Caching

In the previous section of this chapter, you learned how to cache the entire output of a page. In this section, you learn how to take advantage of Partial Page Caching to cache particular regions of a page.

Partial Page Caching makes sense when a page contains both dynamic and static content. For example, you might want to cache a set of database records displayed in a page but not cache a random list of news items displayed in the same page.

In this section, you learn about two methods for enabling Partial Page Caching. You can use post-cache substitution to cache an entire page except for a particular region. You can use User Controls to cache particular regions in a page, but not the entire page.