ASP.NET Web API controller can't handle dynamic objects?

In my code I have a base class Foo and all my objects inherits from the Foo object. So let's say I have a class like this

public class Bar : Foo { public string Heading { get;set; } }

I have tried to use the ApiControllers put method with dynamic but I get this errorhttp://paste2.org/p/1914054

This is the code I'm using in the ApiController

public void Put(string id, dynamic model) { //do stuff }

If I use a normal controller I can use dynamic to post data. How can I make it work with dynamic objects?

Re: ASP.NET Web API controller can't handle dynamic objects?

Your input pararameters cannot be dynamic in Web API (nor can they in MVC, I'm not sure why you think they can).

Re: ASP.NET Web API controller can't handle dynamic objects?

I'm not thinking it works, I know it works in MVC 3. This works just perfect here so my question is still why it doesn't work with the API controller?

Re: ASP.NET Web API controller can't handle dynamic objects?

If you are fine with only using the built-in JSON media type formatter (no XML, Json.NET etc) then you can take a parameter of type JsonValue and call AsDynamic on it to get a dynamic variable representing the content. If you don't want to lock yourself into using only System.Json, you could take a parameter of type IKeyValueModel. It's not as easy to work with but it gives you essentially the same functionality. It probably wouldn't be too difficult to map an IKeyValueModel to a dynamic.

Re: ASP.NET Web API controller can't handle dynamic objects?

kloojed
This works just perfect here so my question is still why it doesn't work with the API controller?

Your sample code does not actually use the editorModel parameter. The value is probably just null.

cstraw
If you don't want to lock yourself into using only System.Json, you could take a parameter of type IKeyValueModel.

Don't use IKeyValueModel. We are going to remove that interface.