.NET AJAX Partial Rendering?

Mar 15, 2010

I have a question about how ASP.NET AJAX partial rendering actually works. Does it:

1) Renders the whole page on the server, transmits the whole page to the client, the client then merges just the area contained in the update panel.

2) Renders the whole page on the server, transmits and merges just the area contained by the update panel.

3) Renders, transmits and merges just the area contained by the update panel.

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[Code]....

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