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Asked: 2026-05-23T00:43:05+00:00

Are these two the same essentially? I am just noticing that Request.IsMvcAjaxRequest() does not

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Are these two the same essentially? I am just noticing that Request.IsMvcAjaxRequest() does not show up in my code hint as it does in the tutorial video here. I am using ASP.net MVC 3

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  1. Editorial Team

    The ASP.NET MVC RC Release Notes states that IsMvcAjaxRequest is renamed to IsAjaxRequest. This means that you should just use IsAjaxRequest.

    Quote from release notes:

    The IsMvcAjaxRequest
    method been renamed to IsAjaxRequest.
    As part of this change, the
    IsAjaxRequest method was updated to
    recognize the X-Requested-With HTTP
    header. This is a well known header
    sent by the major JavaScript libraries
    such as Prototype.js, jQuery, and
    Dojo. The ASP.NET AJAX helpers were
    updated to send this header in
    requests. However, they continue to
    also send it in the body of the form
    post in order to work around the issue
    of firewalls that strip unknown
    headers.

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