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Asked: 2026-05-22T15:11:30+00:00

I have a controller with typical create methods (one for GET, one for POST).

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I have a controller with typical create methods (one for GET, one for POST). the POST takes a strongly-typed parameter:

[HttpPost] public ActionResult Create(Quiz entity)

however, when the callback is made, the properties of my entity are null… if I redefine it like this:

[HttpPost] public ActionResult Create(Quiz entity, FormCollection form)

I can see that the values are there e.g. form["Component"] contains "1". I’ve not had this problem in the past and I can’t figure out why this class would be different.

thoughts anyone?

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1 Answer

  1. Editorial Team

    I FIGURED IT OUT!!

    so, in my model (see comments on @ataddeini’s thread below) you can see I have a Component… to represent components I used a couple of listboxes, the second (Components) dependent on the contents of the first (Products). In generating the second list I used

    @Html.DropDownListFor(x => x.Component, ...)

    which (as shown in one of the above links) generates a form field called “Component”… and therein lies the problem. What I needed to have done is bind it to the the Id of the component instead! 

    @Html.DropDowListFor(x => x.Component.Id, ...)

    hurray!

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