删除不能使用Web Api

Question

当我尝试使用DELETE动词时，我得到一个空参数或控制器不会触发。

首先我尝试这样做：

[HttpDelete] 
    public IHttpActionResult Delete(Announcement announcement) { 
     _unitOfWork.Announcements.Remove(announcement); 
     _unitOfWork.Complete(); 
     return Ok(); 
    } 

控制器火灾，但announcement是null。如果我检查客户端的参数不是null，它是一个正确形成的对象。

如果我添加下面的Route属性，那么控制器根本不会触发。

[HttpDelete] 
    [Route("api/announcements/{announcement}")] 
    public IHttpActionResult Delete(Announcement announcement) { 
     _unitOfWork.Announcements.Remove(announcement); 
     _unitOfWork.Complete(); 
     return Ok(); 
    } 

客户端侧被发起经由角的DELETE。

myAPIservice.DeleteAnnouncement = function (announcement) { 
    console.log('In myAPIservice DeleteAnnouncement'); 
    console.log(announcement); 
    return $http.delete(serviceURLRoot + 'api/announcements/', announcement, { withCredentials: true }).success(function (data) { 
     console.log('myAPIservice.DeleteAnnouncement Success'); 
    }); 
}; 

编辑---

公告类：

public class Announcement { 
    public int AnnouncementId { get; set; } 
    public string AnnouncementText { get; set; } 
} 

Answer 1

您不能发送 '体' 与DELETE调用。

你可以在一个参数的形式发送通告ID：

myAPIservice.DeleteAnnouncement = function (announcementId) { 
    console.log('In myAPIservice DeleteAnnouncement'); 
    console.log(announcement); 
    return $http.delete(serviceURLRoot + 'api/announcements/', announcementId, { withCredentials: true }).success(function (data) { 
     console.log('myAPIservice.DeleteAnnouncement Success'); 
    }); 
}; 

然后从数据库中检索和删除服务器端：

[HttpDelete] 
[Route("api/announcements/{announcementId}")] 
public IHttpActionResult Delete(int announcementId) { 
    var announcement = _unitOfWork.GetAnnouncementById(announcementId); 

    _unitOfWork.Announcements.Remove(announcement); 
    _unitOfWork.Complete(); 
    return Ok(); 
} 

当然还是由ID删除。 ..无论什么作品。

这里需要注意的重要部分是DELETE不能携带有效载荷/主体。