重命名 Web API 控制器已破坏 POST 路由

Renaming a Web API controller has broken POST routing

我有一个 Web API 控制器向 Angular SPA 提供数据,我决定重命名它,使用 VS 2015 的重命名功能来更新我的所有引用。结果,我不能再 POST 了(尽管 GET 仍然有效),我在客户端上不断收到以下错误:

"A route named 'api/Trainees' could not be found in the route collection.
Parameter name: name"

此控制器之前使用默认路由时运行良好 - RouteConfig.cs 中没有任何内容,也没有属性路由,这使它变得很陌生。我假设 ASP.NET 仅从控制器和方法名称计算出默认路由,还是它在任何地方缓存路由信息?

我的控制器看起来像这样:

public class TraineesController : ApiController
{
    private UserRepository repo = new UserRepository();

    // GET: api/Trainees
    public IEnumerable<Trainee> Get()
    {
        return this.repo.GetUsers();
    }

    // GET: api/Trainees/5
    public Trainee Get(string email)
    {
        if (!string.IsNullOrEmpty(email))
        {
            return this.repo.GetUser(email);
        }

        throw new ArgumentNullException("email");
    }

    // POST: api/Trainees
    public IHttpActionResult Post([FromBody]Trainee value)
    {
        try
        {
            this.repo.AddUser(value);
            return CreatedAtRoute("api/Trainees", value.Email, value);
        }
        catch (ArgumentOutOfRangeException)
        {
            return Conflict();
        }
    }

    // PUT: api/Trainees/5
    public IHttpActionResult Put([FromBody]Trainee value)
    {
        try
        {
            this.repo.UpdateUser(value);
            return StatusCode(HttpStatusCode.NoContent);
        }
        catch (ArgumentOutOfRangeException)
        {
            return NotFound();
        }
    }

    // DELETE: api/Trainees/5
    public IHttpActionResult Delete(string email)
    {
        try
        {
            this.repo.RemoveUser(email);
            return StatusCode(HttpStatusCode.NoContent);
        }
        catch (ArgumentOutOfRangeException)
        {
            return NotFound();
        }
    }
}

这是失败的请求(由 Angular $resource 生成):

Request:    POST /api/Trainees HTTP/1.1
Content-Type:   application/json;charset=utf-8
Accept: application/json, text/plain, */*
Referer:    http://localhost:11423/
Accept-Language:    en-GB
Accept-Encoding:    gzip, deflate
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
Host:   localhost:11423
Content-Length: 64
DNT:    1
Connection: Keep-Alive
Cache-Control:  no-cache

正文:

{"Email":"tony@starkindustries.com","DisplayName":"Tony Stark"}

有点晚了,但发生这种情况是因为您试图将 route template 作为 CreatedAtRoute

的第一个参数传递
return CreatedAtRoute("api/Trainees", value.Email, value);

您需要传递一个路由名称。您可以使用 RouteAttribute

命名您的路线
[Route("api/Trainees", Name="TraineesRoute")]`