Web API model binding

Given the ASP.NET Web API route:

example/{Id}

Which maps to the following ApiController action method:

public void Example(Model m)
{
    ...
}

With the model class defined as:

public class Model
{
    public int Id { get; set; }
    public string Name { get; set; }
}

When I post JSON { "Name": "Testing" } to the URL /example/123 then Id property of the Model object is not bound. It remains as 0 instead of 123.

How can I make the model binding also include values from the route data? I'd prefer not having to write custom model binders for what seems like a common use case. Any ideas would be greatly appreciated. Thanks!

Web API model binding

4 Answers