(1) Install ASP.NET AJAX VS2008
(2) Go to C:\Program Files\Microsoft ASP.NET, you can see ASP.NET 2.0 AJAX Templates for Visual Studio 2008 folder --> that implies your installation is succeeded J
(3) Open Ajax enabled ASP.NET web application through VS 2008
(4) Add two labels & one button(say Button1)
(5) Add following code sample into Page_Load() method
Label1.Text = DateTime.Now.ToString();
Label2.Text = DateTime.Now.ToString() ;
(6) Run the application & check the text changes in labels(both change)
(7) Now time to add AJAX extensions
a. Toolbox --> AJAX Extensions --> UpdatePanel
(8) Add “UpdatePanel” control into webpage
(9) Drag Label2 into the “UpdatePanel” area
(10) Run the application & check the changes in labels(both change)
(11) Now go to the “Source” tab of webpage
(12) After the > ContentTemplate tag add the following code sample
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />
(13) Run the application & check the changes in labels(Now only Label1 change)
(14) Your AJAX panel is working J