AsyncPostBackTrigger & PostBackTrigger - Definition,Features - ASP.NET AJAX

Q.  The UpdatePanel supports two types of triggers: AsyncPostBackTrigger and PostBackTrigger. Choose the correct option regarding working of these triggers.
- Published on 28 Jul 15

a. AsyncPostBackTrigger causes an asynchronous (Ajax) postback.
b. PostBackTrigger causes a normal entire-page postback.
c. AsyncPostBackTrigger causes a normal entire-page postback.
d. Option A and B are Correct.

ANSWER: Option A and B are Correct.

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    Discussion

  • Ramesh   -Posted on 19 Oct 15
    The UpdatePanel supports two types of triggers:
    • AsyncPostBackTrigger
    • PostBackTrigger.
    AsyncPostBackTrigger causes an asynchronous (Ajax) postback and PostBackTrigger causes a normal entire-page postback. An AsyncPostBackTrigger is useful for controls that are outside a panel to cause a panel refresh. It is also work for controls that are inside nested panels to cause a refresh of parent panels.

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