未触发异常过滤器

我想在我的工作项目中添加ExceptionFilter。所以我在。net 4.5上用VS2013做了一个测试api项目:

1. web api get动作抛出一个自定义异常(有一个filter属性)

2. 正在构建自定义异常构造函数

效果很好!

现在，我去了我的工作项目，这是与。net 4.5工作，创建了一个TestController文件和复制粘贴从我的测试项目文件的代码。web Api操作被击中，自定义异常构造函数被调用，但异常过滤器没有被触发。为什么?这是我的ApiController, ExceptionFilter, CustomException和一些Customer类:

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Net.Mime;
using System.Text;
using System.Web.Http;
using System.Web.Http.Filters;
using System.Web.Services.Description;
namespace Web.Controllers.WebApi
{
    public class TestController : ApiController
    {
        public static List<Customer> Customers;
        static TestController()
        {
            Customers = new List<Customer>()
            {
                new Customer() {Id = 1, Name = "person1"},
                new Customer() {Id = 2, Name = "person2"},
            };
        }
    [ApiExceptionFilterAttribute]
    public IHttpActionResult Get(int id)
    {
        if (Customers != null)
        {
            var customer = Customers.FirstOrDefault(x => x.Id == id);
            if (customer == null)
            {
                throw new CustomerNotExistsException(id);
            }
            return Ok(customer);
        }
        return InternalServerError();
    }
}

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

public class ApiExceptionFilterAttribute : ExceptionFilterAttribute
{
    public override void OnException(HttpActionExecutedContext actionExecutedContext)
    {
        if (actionExecutedContext.Exception is CustomerNotExistsException)
        {
            throw new HttpResponseException(actionExecutedContext.Request.CreateErrorResponse(HttpStatusCode.InternalServerError, ((CustomerNotExistsException)actionExecutedContext.Exception).Message));
        }
        else
        {
            //genenral 500 error   
            //log exception
        }
    }
}

public class CustomerNotExistsException : HttpResponseException
{
    public int CustomerId { get; set; }
    public string Message { get; set; }
    private const string message = "customer id {0} not found";
    public CustomerNotExistsException(int customerId) : base(new HttpResponseMessage())
    {
        CustomerId = customerId;
        Message = string.Format(message, customerId);
    }
    public CustomerNotExistsException(int customerId, string message) : base(new HttpResponseMessage())
    {
        CustomerId = customerId;
        Message = message;
    }
}
}

这是我的WebApiConfig:

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{action}"
        ); 
    }
}

这是global。asax

public class MvcApplication : HttpApplication
{
    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();
        WebApiConfig.Register(GlobalConfiguration.Configuration);
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        //BundleConfig.RegisterBundles(BundleTable.Bundles); 
    }
    void Application_Error(object sender, EventArgs e)
    {                        
        //some code here
    }
}

更新:

刚刚意识到，当异常过滤器没有触发时，我得到状态码200!

非常奇怪，毕竟它抛出了一个异常