ASP.NET MVC HttpPost posting null model

Question

Form posts from webpage MakeBooking to FinalBooking to ascertain certain information such as number of guests, so the FinalBooking page can give you enough textboxes to input guest information for all guests required.

When in debug mode, both models in MakeBooking post are populated. After post, in FinalBooking, model is null.

    [HttpPost]
    public ActionResult MakeBooking(BookingModel model)
    {
        return RedirectToAction("FinalBooking", "Booking", new { model = model });
    }

    public ActionResult FinalBooking(BookingModel model)
    {
        return View(model);
    }

Any info would be appreciated.

You need to check the model state before assuming the post was correct. Check ModelState.IsValid and if false, return the model back to the view and it will display any validation errors in the validation section. There is also an errors collection you can parse for diagnostic information. — asawyer
– asawyer, Commented Dec 5, 2013 at 14:46

Ilya Sulimanov · Accepted Answer · 2013-12-05 16:07:20Z

2

It should work

return RedirectToAction("FinalBooking", "Booking", model);

edited Dec 5, 2013 at 16:07

answered Dec 5, 2013 at 14:49

Ilya Sulimanov

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1 Comment

Richard Cane Over a year ago

Would rep this if I could, used it elsewhere in project now :)

Shyju · Accepted Answer · 2013-12-05 14:51:47Z

0

You can not pass a model with RedirectToAction like that. you need to use either TempData or Session to transfer the model object between your calls.

RedirectToAction method returns an HTTP 302 response to the browser, which causes the browser to make a GET request to the specified action.

The below example shows how to transfer data using TempData.

[HttpPost]
public ActionResult MakeBooking(BookingModel model)
{
    TempData["TempBookingModel"]=model;
    return RedirectToAction("FinalBooking", "Booking");
}

public ActionResult FinalBooking()
{       
    var model= TempData["TempBookingModel"] as BookingModel; 
    return View(model);
}

Internally TempData is using Session as the storage mechanism.

edited Dec 5, 2013 at 14:51

answered Dec 5, 2013 at 14:46

Shyju

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1 Comment

asawyer Over a year ago

Exactly. Redirect To Action is going to issue an http redirect code to the client (302 I think) and the new action will be invoked. This means the values set in the third param are route values.

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