Ajax update panel image while updating

11 Jan

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Ideally, the Update Panel would have a client-side function named something like that could be called from script to perform a partial page postback and refresh the Update Panel. Instead, you have to write script that triggers a partial page postback for the Update Panel you want to refresh. this is the code of my panel: Where to add this is a good question; especially when dealing with complex pages performing multiple ajax requests.control is a server control that helps you develop Web pages with complex client behavior that makes a Web page appear more interactive to the end user.Such controls, when placed inside an Update Panel, cause a partial page postback to occur.On a partial page postback only the contents of the Update Panel are refreshed, avoiding the "flash" of having the entire page reloaded.Writing code that coordinates between server and client to update only specified parts of a Web page usually requires in-depth knowledge of ECMAScript (Java Script).However, by using the control, you can enable a Web page to participate in partial-page updates without writing any client script.In this chapter we will focus on using timers with Update Panels, so if you haven't already read the chapter on Update Panels, please do so now. We have a normal Update Panel, which carries a Trigger reference to our new Timer control.Here is a small example of using the Timer control. This means that the panel is updated when the Timer "ticks", that is, fires the Tick event.For example, a Button Web control placed within an Update Panel will cause a partial page postback when clicked.It's also possible to have Web controls outside of the Update Panel trigger a partial page postback.