asp.net ajax - calling UpdatePanel.Update multiple times in same postback? -

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can explain me happens if call updatepanel.update() multiple times in same postback event? client updated each time, or updated once?

thanks

calling updatepanel.update update updatepanel once - remember panel/controls go through full postback lifecycle ensures updatepanels content (and applicable viewstate/controlstate) sent client further processing.

this can verified looking @ server response. each update panel updated content, either manually through update or automatically as described here, has associated |updatepanel|<panel_id>|<new_content>| section in response - each panel can have @ 1 |updatepanel| entry.

if outer update panel updated, every contained update panel (immediate children , distant grandchildren) updated part of outer update panel instead of having own |updatepanel| entry.


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