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Asked: 2026-05-14T14:29:25+00:00

I read some paragraphs in a book saying that it is not possible to

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I read some paragraphs in a book saying that it is not possible to do a partial postback for web, even AJAX is employed. Ajax will postback everything and update only ajaxfied controls.
However, on pages I made using ajax, I used Fiddler to monitor the transportation. I found when the page initial load, it loaded everything include pictures …. However, when I click a button and do a ajax postback. I can only see the some data were loaded…. Looks like it doesn’t need to reload the whole page again.
I don’t know if what I see is correct? Or the book I read is correct?

Thank you guys.

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1 Answer

  1. Editorial Team

    That depends what you put in the term “postback”.

    The AJAX call will send the complete form data back to the server, just as if the form was posted normally. The server will answer with a partial response that only contains the parts of the page that should be updated.

    So, the request is not partial, but the response is.

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