Model binding fails when the posted form data has a key called "Model"

[kshyju]

When submit the form and if the form data has an item with key Model, Model binding is failing.

For example, let's say i have a view model like this and I use that class as the param of my http post action method.

public class ModelBinderTestViewModel
{
    public string Name { set; get; }
    public string Model { set; get; }
}

and if i am sending form data like this from my form
Name=Shyju

Model binding works, but when i send

Name:Shyju
Model:Honda

Model binding does not work now.

Here is the link to a minimal sample repo where you can see this issue . Just run the sample app and submit the form and you will see the results in the next view.

Is this a know issue ? If yes, Is there some sort of documentation to advise users to not use Model as a property name.

[Eilon]

@dougbu / @rynowak - I believe this is a known limitation. Do we have any reference info on this?

[rynowak]

What's the name of the parameter?

[pranavkm]

It's named model - https://github.com/kshyju/TempDataBug/blob/master/TempData/Controllers/ModelBinderTestController.cs#L19. It's the issue where top level parameters cannot share the same name as sub properties.

[dougbu]

The documentation, especially the How Model Binding Works sub-section, does describe how request names and values are bound to c# properties. However, the implications of the naming details are not thoroughly spelled out. We thus see a fair number of issues like this one.

The workaround could also be called out in the API Reference e.g. the [ModelBinder] documentation. Right now, the [[ModelBinder(Name = "...")] details] are only boilerplate.

[kshyju]

Thanks!