C# Web API路由操作

目标是允许以下四个端点：

POST    v1/invoices<br/>
POST    v1/invoices/12345<br/>
POST    v1/invoices/12345/attachment<br/>
POST    v1/invoices/12345/image

以下是我在控制器中的四个函数定义：

[HttpPost]
[ActionName("PostAttachment")]
public HttpResponseMessage PostAttachment(int id)

[HttpPost]
[ActionName("PostImage")]
public HttpResponseMessage PostImage(int id)

[HttpPost]
public HttpResponseMessage Post(int id)    

[HttpPost]
public HttpResponseMessage Post()

---

然而，当我使用第一个URI发布发票时，得到识别的路由是附件路由。如何在ID变量后面定义具有不同部分的端点？

我认为必须定义另一个路由，因为第一个URI不应与InvoiceAttachments路由匹配，因为它的末尾没有“/attachments”

尝试使用一个路由

config.Routes.MapHttpRoute(
    name: "DefaultApi",
    routeTemplate: "api/{controller}/{id}/{action}",
    defaults: new { id = RouteParameter.Optional, action = "DefaultAction"  }
);

然后装饰功能，如

[HttpPost]
[ActionName("DefaultAction")]
public HttpResponseMessage Post()


[HttpPost]
public HttpResponseMessage PostImage(int id)

---

您是否尝试过使用约束而不是默认值

routes.MapHttpRoute(
        name: "InvoiceAttachments",
        routeTemplate: "v1/invoices/{id}/attachments",
        defaults: new { controller = "invoices" },
        constraints: new { action = "PostAttachment" } 
    );

routes.MapHttpRoute(
        name: "InvoiceImages",
        routeTemplate: "v1/invoices/{id}/images",
        defaults: new { controller = "invoices" },
        constraints: new { action = "PostImage" } 
    );

routes.MapHttpRoute(
        name: "Default",
        routeTemplate: "v1/invoices/{id}",
        defaults: new { controller = "invoices" }
    );

更新：

您可以通过将该操作作为url的一部分来破解它：

routes.MapHttpRoute(
        name: "InvoiceAttachments",
        routeTemplate: "v1/invoices/{id}/{action}",
        defaults: new { controller = "invoices" },
        constraints: new {action = "attachments|images"}
    );

routes.MapHttpRoute(
            name: "default",
            routeTemplate: "v1/invoices/{id}",
            defaults: new { controller = "invoices", id = RouteParameter.Optional },
            constraints: new {action = "attachments|images"}
        );

以及控制器方法：

[HttpPost]
[ActionName("attachments")]
public HttpResponseMessage PostAttachment(int id)

[HttpPost]
[ActionName("images")]
public HttpResponseMessage PostImage(int id)

public HttpResponseMessage Post(int id)

public HttpResponseMessage Post()

明白了

路线：

routes.MapHttpRoute(
        name: "InvoiceStuff",
        routeTemplate: "v1/invoices/{id}/{*action}",
        defaults: new { controller = "invoices", action = "" }
    );

函数定义：

[HttpPost]
[ActionName("Attachments")]
public HttpResponseMessage Attachments([FromUri]int id)

[HttpPost]
[ActionName("Images")]
public HttpResponseMessage Images([FromUri]int id)

[HttpPost]
public HttpResponseMessage Post()

[HttpPost]
[ActionName("")]
public HttpResponseMessage Post([FromUri]int id)

工作完美。请注意，在路由中，我指定了默认操作“”，因为webAPI路由中存在通配符缺陷。如果我没有执行默认设置，就会抛出null引用异常。有关该缺陷的更多信息可在此处找到：-计划在ASP.NET v5中修复

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谢谢你的帮助

当我执行/invoices/12345时，这不起作用，它将转到默认操作，并且没有传入id参数：/@NiX-您是否尝试将上述DefaultAction更改为接受int id参数

Post（int-id）

-否则您将永远无法获得传入的id…是的，我刚刚意识到我忘记了一个所需的端点：Post/v1/invoices，因此我需要一个Post（），Post（int-id）尝试了该操作并获得此异常：“找到了多个与请求匹配的操作：\r\nSystem.Net.Http.HttpResponseMessage posattachment（Int32）在类型控制器.Api.InvoicesController上\r\nSystem.Net.Http.HttpResponseMessage Post（Int32）在类型控制器.Api.InvoicesController上“，

[HttpPost]
[ActionName("Attachments")]
public HttpResponseMessage Attachments([FromUri]int id)

[HttpPost]
[ActionName("Images")]
public HttpResponseMessage Images([FromUri]int id)

[HttpPost]
public HttpResponseMessage Post()

[HttpPost]
[ActionName("")]
public HttpResponseMessage Post([FromUri]int id)