Question

使用.NET 4.5.1，Web API 2，Visual Studio 2013：

我有一个Web API，它有以下路由......

/ API /提供商/特色
/ API /提供商/特色/ 123
/ API /提供商/特色/药

这些按预期工作......第一个获得所有专业的列表，第二个获得专业ID 123，第三个获得名称中“药”的所有专业。

我也有这些路线......

/ API /位置/特色
/ API /位置/特色/ 123
/ API /位置/特色/邻

只有最后两个工作...第一个返回此错误：

No HTTP resource was found that matches the request URI [...]
No route providing a controller name was found to match request URI 'http://mysite/api/locations/specialties'

这怎么可能？它会击中该控制器中的其他路径，而不是基础路径。

（我还还有两个其他控制器，路由 / api / providers 和 / api / locations ，它们可以正常工作。）

以下是 ProviderSpecialtyController.cs 代码：

[RoutePrefix("api/providers/specialties")]
public class ProviderSpecialtyController : ApiController
{
    private ProviderEntities db = new ProviderEntities();

    /// <summary>
    /// Get ALL specialties, sorted by name.
    /// </summary>
    [Route("")]
    public IQueryable<ProviderSpecialty> Get()
    {
        return db.ProviderSpecialties.OrderBy(s => s.Name);
    }

    /// <summary>
    /// Get a specific specialty.
    /// </summary>
    /// <param name="id">The ID of a particular specialty.</param>
    [Route("{id:int}")]
    public ProviderSpecialty Get(int id)
    {
        return db.ProviderSpecialties.Where(s => s.Id == id).FirstOrDefault();
    }

    /// <summary>
    /// Get all specialties that contain a keyword.
    /// </summary>
    /// <param name="keyword">The keyword to search for in a specialty name.</param>
    [Route("{keyword:alpha}")]
    public IQueryable<ProviderSpecialty> Get(string keyword)
    {
        return db.ProviderSpecialties.Where(s => s.Name.Contains(keyword)).OrderBy(s => s.Name);
    }
}

这是 LocationSpecialtyController.cs 代码：

[RoutePrefix("api/locations/specialties")]
public class LocationSpecialtyController : ApiController
{
    private ProviderEntities db = new ProviderEntities();

    /// <summary>
    /// Get ALL specialties, sorted by name.
    /// </summary>
    [Route("")]
    public IQueryable<LocationSpecialty> Get()
    {
        return db.LocationSpecialties.OrderBy(s => s.Name);
    }

    /// <summary>
    /// Get a specific specialty.
    /// </summary>
    /// <param name="id">The ID of a particular specialty.</param>
    [Route("{id:int}")]
    public LocationSpecialty Get(int id)
    {
        return db.LocationSpecialties.Where(s => s.Id == id).FirstOrDefault();
    }

    /// <summary>
    /// Get all specialties that contain a keyword.
    /// </summary>
    /// <param name="keyword">The keyword to search for in a specialty name.</param>
    [Route("{keyword:alpha}")]
    public IQueryable<LocationSpecialty> Get(string keyword)
    {
        return db.LocationSpecialties.Where(s => s.Name.Contains(keyword)).OrderBy(s => s.Name);
    }
}

如您所见，除路线前缀外，它们几乎相同。为什么提供程序控制器按预期工作但位置控制器不工作？

我启用了跟踪功能，在尝试点击 / api / locations / specialties 时会出现以下情况：

System.Web.Http.Request: GET http://localhost:49565/api/locations/specialties/: Category=System.Web.Http.Request, Level=Info Begin   http://localhost:49565/api/locations/specialties/
System.Web.Http.Controllers: GET http://localhost:49565/api/locations/specialties/: Category=System.Web.Http.Controllers, Level=Info Begin DefaultHttpControllerSelector SelectController Route='MS_SubRoutes:System.Web.Http.Routing.IHttpRouteData[]'
[...]
System.Web.Http.Controllers: GET http://localhost:49565/api/locations/specialties/: Category=System.Web.Http.Controllers, Level=Error End DefaultHttpControllerSelector SelectController Processing of the HTTP request resulted in an exception. Please see the HTTP response returned by the 'Response' property of this exception for details.

Answer 1

这比看起来更简单，但是由于调试不当（filed and verified as a bug在Codeplex中为Kiran Challa而确定原因变得更加困难。这应该在Web API 2.1中修复。

我有一个这条路线的控制器：

/api/locations/keyword

哪个会对keyword进行关键字搜索。

我有另一个控制器使用这些路线：

/api/locations/specialties /api/locations/specialties/123 /api/locations/specialties/keyword

API引擎很困惑，因为我有两个基本相同路径的控制器。我删除了一个，问题得到解决。

根据Codeplex问题跟踪器，问题已经过验证，已关闭，并在Web API 2.1中添加了新的错误消息。

Web API 2路由属性在一个控制器中工作，但不在另一个控

1 个答案: