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The primary role of the script manager is to support all the ajax controls which renders the scripting utilities to the browser and does the client side operations on a web browser.
The Script Manager control acts as a global registrar of sorts for all the services you need in your ASP. It actually performs asynchronous communication with the code running on the client so that the script can perform the necessary page updates.
Though this concept is not latest topics I want explain in this article the internals of update panel how it actually works and the major features of it.
Significance of Script Manager The scriptmanager plays the pivotal role in the functioning of the update panel which does all the client stuff required.
If the Update Mode is Always, Update Panel control’s content is updated on every postback that originates from anywhere on the page.
This includes asynchronous postbacks from controls that are inside other Update Panel controls, and postbacks from controls that are not inside Update Panel controls. Update(); Observe the response through all the three panels markup is rendered back.
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When we observer through fiddler both the updatepanels contents are rendered back. NET CLR 3.5.21022) Content-Type: application/x-www-form-urlencoded Accept-Encoding: gzip, deflate Host: ssss-d6f1520724 Content-Length: 239 Connection: Keep-Alive Pragma: no-cache We can also programmatically control postbacks of the controls and make them synchronous and asynchronous based on the requirement.