请求的站点上不存在“Access-Control-Allow-Origin”标头

Question

我已经在我的应用程序中设置了 Cors，其他所有端点似乎都可以工作，我刚刚添加了这个，但我不确定为什么我会收到这个 Cors 错误。 帮助！

这是我的 API 控制器

using CustomerServicePortal.Api.Infrastructure;
using CustomerServicePortal.Api.Models.RsrPortal;
using CustomerServicePortal.Api.Repository.RsrPortal;
using System.Configuration;
using System.IdentityModel.Claims;
using System.Net.Mail;
using System.Web.Http;
using System.Web.Http.Cors;

namespace CustomerServicePortal.Api.Controllers.RsrPortal
{
    [RoutePrefix("notification")]
    [Authorize(Roles = CspGroups.RsrPortal + "," + CspGroups.RsrSuperUser)]
    public class EmailNotificationController : BaseApiController
    {

        [HttpPost, Route("create-work-order")]
        public IHttpActionResult CreateWorkOrder(NotificationParamDto email)
        {
            var notification =
                new CreateWorkOrder(new MailAddress("no-reply@fbhealthplans.com"),
                    $"tshuff@fbhealthplans.com|servicedesk@fbhealthplans.com", email.repName, email.countyOfficeName);

            notification.Send();
            return Ok();
        }
    }
}

这是我的打字稿服务，它可以访问 api 控制器

sendCreateWorkOrderNotification(emailParam: Models.Api.NotificationParam): angular.IPromise<Models.Api.NotificationParam> {
            return this.restangular.one("notification/create-work-order").post(emailParam);
        }

这是我调用此服务的打字稿代码

this.emailNotificationService.sendCreateWorkOrderNotification({repName:"test", countyOfficeName:"test"}).then((result) => console.log(result));