MVC的Web API，得到子项目 [英] MVC Web API, get sub items

问题描述

我有两个表的数据库。国家和城市，每个城市都有一个关系到国家spesific。

I have a database with two tables. Countries and Cities where each city has a relation to a spesific country.

在我的ASP.Net的Web API，我可以通过一个GET请求国家的列表，的http：//例子.COM / API /国家来运行CountriesController。我可以通过 http://example.com/api/countries/1。

In my ASP.Net Web API I can get a list of countries by a GET request to http://example.com/api/countries to run the CountriesController. And I can get details about a country by http://example.com/api/countries/1.

如果我要为一个国家的所有城市的列表的REST查询URL应该是的http：/ /example.com/api/countries/1/cities ？而对于一个城市 http://example.com/api/countries/1/cities/ 1

If I want a list of all cities for a country the REST query URL should be http://example.com/api/countries/1/cities? And details for a City http://example.com/api/countries/1/cities/1

我怎样才能做到这一点在ASP.Net的Web API？

How can I accomplish this in ASP.Net Web API?

推荐答案

这个怎么样，在规定的global.asax.cs像这样一个附加的API的路线：

How about this, in global.asax.cs define an additional api route like so:

routes.MapHttpRoute(
    name: "CityDetail",
    routeTemplate: "api/countries/{countryid}/cities/{cityid}",
    defaults: new { controller = "Cities" }
);

然后定义一个新的CitiesController像这样：

Then define a new CitiesController like so:

public class CitiesController : ApiController
{
    // GET /api/values
    public IEnumerable Get()
    {
        return new string[] { "value1", "value2" };
    }

    // GET /api/values/5
    public string Get(int countryId, int cityid)
    {
        return "value";
    }

    // POST /api/values
    public void Post(string value)
    {
    }

    // PUT /api/values/5
    public void Put(int countryId, int cityid, string value)
    {
    }

    // DELETE /api/values/5
    public void Delete(int countryId, int cityid)
    {
    }
}

不用说，你可能想提高控制器实现了​​一下：）

Needless to say you might want to improve the controller implementation a bit :)

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