Looking Back in Time

We will discuss how we can implement this feature using the UpdatePanel and UpdateProgress controls in this hour. But before we do so, let’s walk through the earlier approaches that were followed to accomplish partial-page rendering in web applications.

The IFrame Technique

IFrame stands for Inline Frame. It is an HTML element that acts as a container to hold other HTML documents. This supports the concept of partial-page rendering because the whole web page is not refreshed at one time—only the content of the IFrame control is posted back to the server. This improves the user experience a bit, but is not the best solution. Why?