Ajax update panel image while updating
Only the contents of the Update Panel control will be updated. NET AJAX controls require specific settings in a web.config file in order to function correctly.
The following example will show the use of both childtags. As you can see, the first Update Panel carries a trigger which references the second button.This control is used to extend the update panel and create animations for update panel while updating the update panel is in progress or updating update panel is completed .It has the property Target Control ID to specify the ID of the updatepanle to extend & animations property is used to specify the animations to play with in animations property you can use the events ‘on updated’ & ‘on updating’ It supports the all the animations that are supported by Animation Extender.If you wish for the content of a Update Panel to be updated no matter what, you may change the updatemode property to Always.In this walkthrough you will update part of a web page at a timed interval by using three ASP.