bB65WvPW

1//Creamos el filtro
2    public class EnteroFilter : System.Web.Http.Filters.ActionFilterAttribute
3    {
4        public override void OnActionExecuting(HttpActionContext filterContext)
5        {
6            if (!filterContext.ModelState.IsValid)
7            {
8                if (filterContext.ActionArguments.TryGetValue("id", out object value))
9                {
10                    if (null == value)
11                    {
12                        filterContext.Response =
13                            filterContext.Request
14                            .CreateResponse(
15                                HttpStatusCode.BadRequest,
16                            new { Code = HttpStatusCode.BadRequest, reason = "data invalida para param Id" });
17                    }
18                }
19                //o bien para obtener todos los errores
20                var errores = filterContext
21                    .ModelState
22                    .Values
23                    .Select((x, index) =>
24                    new
25                    {
26                        key = filterContext.ModelState.Keys.ElementAt(index),
27                        error = x.Errors[index].Exception.InnerException.Message //validar que tenga innerException
28                    });
29            }
30        }
31    }
32
33
34
35//Registrar el filtro
36//en WebApiConfig.cs
37  public static class WebApiConfig
38    {
39        public static void Register(HttpConfiguration config)
40        {
41            // Web API configuration and services
42            //...
43        }
44
45        internal static void RegisterGlobalFilters(HttpFilterCollection filters)
46        {
47               filters.Add(new EnteroFilter());
48        }
49    }
50//en global.asax
51public class WebApiApplication : System.Web.HttpApplication
52    {
53        protected void Application_Start()
54        {
55        //...
56            WebApiConfig.RegisterGlobalFilters(GlobalConfiguration.Configuration.Filters);
57        //...
58
59          
60        }
61    }
62
63//Usar el filtro
64 public class ValuesController : ApiController
65    {
66        // GET api/values/5
67        [EnteroFilter]
68        public string Get(int id)
69        {
70            return "value";
71        }
72	}
73