ASP.Net MVC 4 WebAPI POST返回404

我已经查看了许多类似的问题,但找不到适合我的解决方案.所以对Get的调用工作正常,但调用POST返回404.我创建了一个简单的WebAPI项目(MVC 4).

public class CasesController : ApiController
{
    [Inject]
    public ICaseManager CaseManager { get; set; }

    // GET api/cases
    public IEnumerable Get()
    {
        return CaseManager.ListCases();
    }

    // POST api/cases
    [HttpPost]
    public void Post([FromBody]Case objCase)
    {

    }
}

因此,当我导航到http://localhost:34645/api/cases我时,我得到以下内容:

[{"CaseID":1,"CaseCode":"one","CaseDescription":"case one"},{"CaseID":2,"CaseCode":"two","CaseDescription":"case two"}]

我创建了另一个项目(ASP.Net)并在其中包含一个html文件,其中包含以下代码:

每次我单击调用postData的按钮时,我都会收到警告"错误404".

这是我的路线:

Global.asax中:

protected void Application_Start()
{
    AreaRegistration.RegisterAllAreas();

    WebApiConfig.Register(GlobalConfiguration.Configuration);
    FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
    RouteConfig.RegisterRoutes(RouteTable.Routes);
    BundleConfig.RegisterBundles(BundleTable.Bundles);
}

WebAPIConfig.Register:

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );

        //RA: to get JSON
        var appXmlType = config.Formatters.XmlFormatter.SupportedMediaTypes.FirstOrDefault(t => t.MediaType == "application/xml");
        config.Formatters.XmlFormatter.SupportedMediaTypes.Remove(appXmlType);

    }
}

RouteConfig:

 public class RouteConfig
 {
    public static void RegisterRoutes(RouteCollection routes)
    {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

        routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
        );
    }
}

请指教.