CODEWITHSUNDEEP
asp.netajaxasp.net-ajax
Rajaram Shelar
Rajaram Shelar

Reputation: 7877

What happen when we use updatepanel?

This is very basic question but still not solve from my end. I got a nice link Update Panel. and come to know there are so many overheads while using update panel. Instead of that use page method. My question pointers are as below.

  1. Which data send to the server in ajax call (I mean whole page data or only update panel data)?
  2. What portion get refreshed at client side.
  3. Why page does not flickered or how browser only repaint the updatepanel portion.

I am expecting only the theoretical answers to clear the concept.

Upvotes: 0

Views: 352

Answers (1)

mshsayem
mshsayem

Reputation: 18008

Short answers:

  1. All input fields on the aspx page will be submitted along with the whole ViewState (and few more hidden fields). You can see what is being transferred by pressing F12 (in chrome, or in firefox if firebug is installed) and selecting the network tab.

  2. All controls inside the updatepanel along with the ViewState will be updated/refreshed.

  3. The request is asynchronous. Response will be captured by the javascript (plugged in via ScriptManager) and it will modify the DOM structure (of associating updatepanel portion) to reflect the update; so you will not see the loading icon on the browser tab.

Upvotes: 1

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