ASP.NET Web API - 未设置ActionFilter属性

Question

I have a base controller class that extends from ApiController and specifies this abstract method:

[HttpPost]
[ValidateModelFilter(Argument = "dto")]
public abstract Task<IHttpActionResult> Post(PostDTO dto);

This method will be implemented by all the child classes, but the filter will be implictly applied without them realizing.

This approach works fine, my filter is executed. But my Argument property is not being set to "dto" .

This is my ValidateModelFilter class:

public class ValidateModelFilter : ActionFilterAttribute, IActionFilter, IFilter
{
    public string Argument { get; set; }

    public override void OnActionExecuting(HttpActionContext actionContext)
    {
         //Some validation here...
    }
}

Everything works fine except for the fact that my Argument property is always null , whether I apply the filter like this: [ValidateModelFilter] or this [ValidateModelFilter(Argument = "dto")]

Please, also note that I'm currently using an OWIN pipeline and Ninject for dependency injection.

Answer 1

For future readers, I managed to solve the problem.

I was registering my filter in my application's configuration:

public static void Register(HttpConfiguration configuration)
{
    configuration.Filters.Add(new ValidateModelFilter());
}

This makes it "Global" and is always executed, whether you have that filter annotation or not.

I commented that line and now my filter works fine.

//configuation.Filters.Add(new ValidateModelFilter());