ASP.NET Web API?? ?? ??? ?? ??

ASP.NET Web API ???????? ??? ??? ? ? ?? ??? ??? ??? ???? ???? ? ??? ??? ???. ModelState ??? ?? ??? ?? ?? ???? ???? ???? ??? ????? ?????.

?? ????? ?????.

??? ????.

public class Enquiry
{
    [Key]
    public int EnquiryId { get; set; }
    [Required]
    public DateTime EnquiryDate { get; set; }
    [Required]
    public string CustomerAccountNumber { get; set; }
    [Required]
    public string ContactName { get; set; }
}

API? ?????? Post ??? ????.

public void Post(Enquiry enquiry)
{
    enquiry.EnquiryDate = DateTime.Now;
    context.DaybookEnquiries.Add(enquiry);
    context.SaveChanges();
}

?? ??? ??? ????? ??? ??? ? ????. ModelState.IsValid ??:

public void Post(Enquiry enquiry)
{
    if (ModelState.IsValid)
    {
        enquiry.EnquiryDate = DateTime.Now;
        context.DaybookEnquiries.Add(enquiry);
        context.SaveChanges();
    }
}

??? ???? ??? ???? ??????? ???? ?????. ??? ??? ??? ?? ?? ???? ?? 400(??? ??) ??? ?????.

??? ?? ???? ???? ?? ?? ??? ??? ?? ?? ??? ??? ?? ????.

using System.Net;
using System.Net.Http;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;

namespace System.Web.Http.Filters
{
    public class ValidationActionFilter : ActionFilterAttribute
    {
        public override void OnActionExecuting(HttpActionContext actionContext)
        {
            var modelState = actionContext.ModelState;

            if (!modelState.IsValid)
                actionContext.Response = actionContext.Request
                     .CreateErrorResponse(HttpStatusCode.BadRequest, modelState);
        }
    }
}

?? ? ??? Post ??? ?????.

[ValidationActionFilter]
public void Post(Enquiry enquiry)
{
    enquiry.EnquiryDate = DateTime.Now;
    context.DaybookEnquiries.Add(enquiry);
    context.SaveChanges();
}

??? ?? ?? ? ??? ???? ?? ??? ???? API ?????? ??? ??? ????? ??? ? ????. ???? ???? ????? ?? ?? ?? ???? ?????.

? ??? ASP.NET ? API?? ?? ??? ??? ????? ????? ??? ?? ????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!