Web Api Required Parameter

Question

Using ASP.NET Web API. Is there a way to automatically return a status code 400 if a parameter is null? I found this question but that is a global solution that is applied

Answer 1

Set [Required] on a property in your model and then check the ModelState to see if it IsValid.

This will allow all the required properties to be tested at the same time.

See the "Under-Posting" section @ Model validation in WebAPI