ASP.NET Core FromForm And FromBody Same Action

Question

Can I have both FromForm and FromBody attributes to action ?

public IActionResult Index([FromBody][FromForm] Person model){
.....
}

When someone send request from postman and have provided the data in raw section to be mapped to the model but in the same time to work with forms. — Petko Pasev, May 21 '18 at 19:39
Look it https://stackoverflow.com/questions/50245160 There is a way to solve your task. — Nodon, Aug 28 '18 at 12:50

score 44 · Accepted Answer · edited Aug 18 '21 at 07:42

44

No, it's not possible.

The FromForm attribute is for incoming data from a submitted form sent by the content type application/x-www-form-urlencoded while the FromBody will parse the model the default way, which in most cases are sent by the content type application/json, from the request body.

edited Aug 18 '21 at 07:42

PatchingMatching

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answered May 21 '18 at 17:48

Marcus Höglund

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As @Nodon mentions, it IS possible, check https://stackoverflow.com/a/51735331/2276157 – kloarubeek Jan 03 '20 at 09:13
2

@kloarubeek yes, its possible on different actions, not on the same. – Marcus Höglund Jan 03 '20 at 09:36
1

The signature of the action still needs to differ – Swimburger Jan 10 '20 at 21:38
1

BTW this is a downgrade from the old ".NET Framework" where one action method would bind to all possible inputs – Alex from Jitbit Mar 02 '23 at 20:47

score 6 · Answer 2 · answered Oct 09 '21 at 21:54

Please look at this library https://github.com/shamork/Toycloud.AspNetCore.Mvc.ModelBinding.BodyAndFormBinding

I used the source and modified a bit as there is an issue with .Net 5 with ComplexTypeModelBinderProvider being obsolete

https://learn.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.mvc.modelbinding.binders.complextypemodelbinderprovider?view=aspnetcore-5.0

In short, this prevents having to do this

    public class JsonRequestItem {
        public string jsonRequest { get; set; }
    }

    [HttpPost]
    [ActionName("NewRequest")]
    [Consumes("application/json")]
    public IActionResult NewRequestFromBody([FromBody]JsonRequestItem item) {
        return NewRequest(item.jsonRequest);
    }

    [HttpPost]
    [ActionName("NewRequest")]
    [Consumes("application/x-www-form-urlencoded")]
    public IActionResult NewRequestFromForm([FromForm]JsonRequestItem item) {
        return NewRequest(item.jsonRequest);
    }

    private IActionResult NewRequest(string jsonRequest) {
        return new EmptyResult(); // example
    }

Now you can simplify as one action and get both FromBody and FromForm

    [HttpPost]
    [ActionName("NewRequest")]
    public IActionResult NewRequestFromBodyOrDefault([FromBodyOrDefault]JsonRequestItem item) {
        return new EmptyResult(); // example
    }

ASP.NET Core FromForm And FromBody Same Action

2 Answers2

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