blocks|key|2769905|text|属性路由不能继承。这是一个经过深思熟虑的设计决定。我们感觉不对劲，也看不到继承它们有意义的有效场景。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2769906|你能给出一个更现实的场景，关于你想要在哪里使用它吗？|2769907|Update(3/24/2014)|offset|length|style|BOLD|2769908|在即将发布的MVC+Web+API+5.2版本中，将会有一个名为System.Web.Http.Routing.IDirectRouteProvider的扩展点，通过它您可以启用您在这里寻找的继承场景。您可以自己尝试使用最新的夜间构建(有关如何使用夜间构建的文档请参阅)|CODE|2769909|Update(7/31/2014)|2769910|在Web+API+2.2版本中如何做到这一点的示例：|2769911|config.MapHttpAttributeRoutes(new+CustomDirectRouteProvider());

//---------

public+class+CustomDirectRouteProvider+:+DefaultDirectRouteProvider
{
++++protected+override+IReadOnlyList<IDirectRouteFactory>+
++++GetActionRouteFactories(HttpActionDescriptor+actionDescriptor)
++++{
++++++++//+inherit+route+attributes+decorated+on+base+class+controller's+actions
++++++++return+actionDescriptor.GetCustomAttributes<IDirectRouteFactory>
++++++++(inherit:+true);
++++}
}|code-block|syntax|javascript|2769912|entityMap^0|0|0|0|6|0|W|18|0|0|6|0|9|3|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Z|8|@$F|10|G|11|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|12|8|@$F|13|G|14|H|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|15|8|@$F|16|G|17|H|I]]|9|@]|A|$]]|$1|O|3|P|5|6|7|18|8|@$F|19|G|1A|H|L]]|9|@]|A|$]]|$1|Q|3|R|5|S|7|1B|8|@]|9|@]|A|$T|U]]|$1|V|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|W|$]]

Attribute routes cannot be inherited. This was a deliberate design decision. We didn't feel right and didn't see valid scenarios where it would make sense to inherit them. 

Could you give a more realistic scenario as to where you would want to use this?

[Update(3/24/2014)] 
In the upcoming 5.2 release of MVC Web API, there is going to be an extensibility point called <code>System.Web.Http.Routing.IDirectRouteProvider</code> through which you can enable the inheritance scenario that you are looking for here. You could try this yourself using the latest night builds(documentation on how to use night builds is <a href="https://aspnetwebstack.codeplex.com/wikipage?title=Use%20Nightly%20Builds">here</a>)

[Update(7/31/2014)] 
Example of how this can be done in Web API <code>2.2</code> release:

<pre><code>config.MapHttpAttributeRoutes(new CustomDirectRouteProvider());

//---------

public class CustomDirectRouteProvider : DefaultDirectRouteProvider
{
 protected override IReadOnlyList&lt;IDirectRouteFactory&gt; 
 GetActionRouteFactories(HttpActionDescriptor actionDescriptor)
 {
 // inherit route attributes decorated on base class controller's actions
 return actionDescriptor.GetCustomAttributes&lt;IDirectRouteFactory&gt;
 (inherit: true);
 }
}
</code></pre>

blocks|key|2769946|text|明白了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2769947|[Route("api/baseuploader/{action}")]
public+abstract+class+BaseUploaderController+:+ApiController
{
++++[HttpGet]+
++++public+string+UploadFile()+
++++{
++++++++return+"UploadFile";
++++}
}


[Route("api/values/{action}")]
public+class+ValuesController+:+BaseUploaderController
{
++++[HttpGet]
++++public+string+Get(int+id)
++++{
++++++++return+"value";
++++}
}|code-block|syntax|javascript|2769948|这里需要注意的一点是，路由操作参数必须与操作名称相同。我找不到解决这个问题的办法。(不能使用RouteAttribute重命名路由)|2769949|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Got it.

<pre><code>[Route("api/baseuploader/{action}")]
public abstract class BaseUploaderController : ApiController
{
 [HttpGet] 
 public string UploadFile() 
 {
 return "UploadFile";
 }
}


[Route("api/values/{action}")]
public class ValuesController : BaseUploaderController
{
 [HttpGet]
 public string Get(int id)
 {
 return "value";
 }
}
</code></pre>

One caveat here is that the route action paramter must be the same as the action name. I could not find a way to get around that. (You cannot rename the route with a RouteAttribute)

blocks|key|172030|text|使用Web+API+2.2，您可以：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|172031|public+class+BaseController+:+ApiController
{
++++[Route("{id:int}")]
++++public+string+Get(int+id)
++++{
++++++++return+"Success:"+%2B+id;
++++}
}
[RoutePrefix("api/values")]
public+class+ValuesController+:+BaseController
{
}

config.MapHttpAttributeRoutes(new+CustomDirectRouteProvider());
public+class+CustomDirectRouteProvider+:+DefaultDirectRouteProvider
{
++++protected+override+IReadOnlyList<IDirectRouteFactory>+
++++GetActionRouteFactories(HttpActionDescriptor+actionDescriptor)
++++{
++++++++return+actionDescriptor.GetCustomAttributes<IDirectRouteFactory>
++++++++(inherit:+true);
++++}
}|code-block|syntax|javascript|172032|如下所示：http://www.asp.net/web-api/overview/releases/whats-new-in-aspnet-web-api-22|offset|length|172033|entityMap|0|LINK|mutability|MUTABLE|url|http://www.asp.net/web-api/overview/releases/whats-new-in-aspnet-web-api-22^0|0|0|5|23|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Using Web API 2.2, you can:

<pre><code>public class BaseController : ApiController
{
 [Route("{id:int}")]
 public string Get(int id)
 {
 return "Success:" + id;
 }
}
[RoutePrefix("api/values")]
public class ValuesController : BaseController
{
}

config.MapHttpAttributeRoutes(new CustomDirectRouteProvider());
public class CustomDirectRouteProvider : DefaultDirectRouteProvider
{
 protected override IReadOnlyList&lt;IDirectRouteFactory&gt; 
 GetActionRouteFactories(HttpActionDescriptor actionDescriptor)
 {
 return actionDescriptor.GetCustomAttributes&lt;IDirectRouteFactory&gt;
 (inherit: true);
 }
}
</code></pre>

as outlined here: <a href="http://www.asp.net/web-api/overview/releases/whats-new-in-aspnet-web-api-22" rel="noreferrer">http://www.asp.net/web-api/overview/releases/whats-new-in-aspnet-web-api-22</a>

I am playing around with the idea of having a base controller that uses a generic repository to provide the basic CRUD methods for my API controllers so that I don't have to duplicate the same basic code in each new controller. But am running into problems with the routing attribute being recognized when it's in the base controller. To show exactly what the problem I'm having I've created a really simple WebAPI controller.

When I have a <code>Get</code> method in the main Controller and it inherits from the <code>ApiController</code> directly I don't have any problems and this works as expected.

<pre><code>[RoutePrefix("admin/test")]
public class TestController : ApiController
{
 [Route("{id:int:min(1)}")]
 public string Get(int id)
 {
 return "Success";
 }
}
</code></pre>

When I move the <code>Get</code> method into a base controller it is returning the contents of the 404 page.

<pre><code>[RoutePrefix("admin/test")]
public class TestController : TestBaseController
{

}

public class TestBaseController : ApiController
{
 [Route("{id:int:min(1)}")]
 public string Get(int id)
 {
 return "Success";
 }
}
</code></pre>

Some more interesting notes:

<ul>
<li>I can access the action at <code>GET</code> <code>/Test/1</code>. So it is finding it based on the default route still.</li>
<li>When I try to access <code>POST</code> <code>/admin/test</code>, it returns the following JSON

{
"Message":"No HTTP resource was found that matches the request URI '<a href="http://test.com/admin/test" rel="nofollow noreferrer">http://test.com/admin/test</a>'.",
"MessageDetail":"No type was found that matches the controller named 'admin'."
}</li>
</ul>

Does anyone know of a way to get the routing to work with attributes from a base controller?

Attribute routing and inheritance

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我正在尝试一个基本控制器，它使用通用存储库为我的API控制器提供基本的CRUD方法，这样我就不必在每个新控制器中复制相同的基本代码。但是我遇到了路由属性在基本控制器中时被识别的问题。为了准确地显示我遇到的问题，我创建了一个非常简单的WebAPI控制器。当我在主控制器中有一个Get方法，并且它直接从ApiControll...

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