Request.IsAjaxRequest() alternative in MVC6

Question

I am trying to run this example Rendering Partial Views using ajax, but i got the following compilation error:

'HttpRequest' does not contain a definition for 'IsAjaxRequest' and no extension method 'IsAjaxRequest' accepting a first argument of type 'HttpRequest' could be found.

    public ActionResult ItemsList(string ID)
    {
        Item item = Service.GetItemById(ID);

        if (Request.IsAjaxRequest())
        {
            return PartialView("viewPath", item);
        }
        else
        {
            return View("viewPath", item);
        }
    }

I found this similar question stackoverflow.com/questions/18012983/…, but no answer is given — Mariyan Marinov
– Mariyan Marinov, Commented Mar 31, 2017 at 10:40

Ricardo Peres · Accepted Answer · 2025-04-23 08:24:14Z

4

Check the user agent, as this:

var isAjax = Request.Headers["X-Requested-With"] == "XMLHttpRequest"
           || Request.Headers["X-Requested-With"] == "Fetch";

edited Apr 23 at 8:24

answered Mar 31, 2017 at 10:42

Ricardo Peres

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2 Comments

adem caglin Over a year ago

Also an example(aspnet/security source code) is here github.com/aspnet/Security/blob/…

Voodoo Over a year ago

IsAjaxRequest() in MVC internally use this to check for AJAX calls. So, I don't think this as an alternative.

Brian · Accepted Answer · 2017-11-02 15:24:32Z

3

Ricardo Peres's answer works for ajax requests but misses the new Fetch types. This works for me:

internal static class RequestHelpers
{
    internal static bool IsAjaxRequest(this HttpRequest request)
    {
        return string.Equals(request.Query["X-Requested-With"], "XMLHttpRequest", StringComparison.Ordinal) ||
            string.Equals(request.Headers["X-Requested-With"], "XMLHttpRequest", StringComparison.Ordinal) ||
            string.Equals(request.Headers["X-Requested-With"], "Fetch", StringComparison.Ordinal);
    }
}

answered Nov 2, 2017 at 15:24

Brian

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