NET AJAX.
CHAPTER 5 ?– INTRODUCING SERVER CONTROLS IN ASP.NET AJAX 108
Using Server Controls in ASP.NET
AJAX
This chapter follows on from Chapter 5, which introduced you to the ASP.NET AJAX
server controls and showed you how to use them. In this chapter, you??™ll look at two small
ASP.NET AJAX applications and dissect them to see how they work. In the process, you??™ll
glean a lot of new information about how to use the ASP.NET AJAX server controls to
build powerful AJAX-style applications and how to extend your existing applications with
asynchrony.
One of the applications that will be discussed happens to be also one of the first
small apps built to showcase some of the features of ASP.NET AJAX. This application,
called Scott??™s ToDo List, is a great example of a simple data-driven AJAX-enabled ASP.NET
web application. But before that, let??™s combine the controls discussed in the previous
chapter to create a practical solution to a common scenario.
Using the UpdatePanel, UpdateProgress, and
Timer Controls
For this first example, consider the following scenario: You have a data-driven web page
that needs to continuously alert the user with fast changing data, for instance, a page that
displays the major financial indices in the U.
Pages:
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183