Code in script blocks

[Roshawn Dawson]

Hi,

Does code contained in <% %> blocks cause postbacks to the server?

Thanks,
Roshawn

 

[Juan T. Llibre]

No.

 

[Brock Allen]

Code in <%%> blocks get executed during the rendering of the page. Render
happens late in the life cycle of the page on the server -- after Page_Init,
Page_Load, Validate, server events (such as change and click) and Page_PreRender.

Code in <script runat=server> blocks is code added to the class generated
by ASP.NET for your ASPX file. You put methods, and event handlers typically
in this code block.

What causes postbacks are typically controls you declare in the <form runat=server>
such as a <asp:Button>. ASP.NET's programming model is an event based architecture,
so when there is the postback you handle the postback by handling Button's
Click event. If you have other controls on the form that might have caused
the postback (instead of the button) you'd hande their events.