MVC网页API路由默认动作不灵 [英] MVC Web Api Route with default action not working

问题描述

在我的的TestController 我有以下内容：

 [HttpGet]
    public IEnumerable<String> Active()
    {
        var result = new List<string> { "active1", "active2" };

        return result;
    }

    [HttpGet]
    public String Active(int id)
    {
        var result = new List<string> { "active1", "active2" };

        return result[id];
    }

在 RouteConfig 的映射是：

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

        routes.MapHttpRoute(
            name: "ActionApi",
            routeTemplate: "api/{controller}/{action}/{id}",
            defaults: new { action = "", id = RouteParameter.Optional });

在浏览器下面的请求如下：

In a browser the following request works:

api/test/active/1

但是，这返回内部服务器错误

api/test/active

你有什么做的，返回的动作的可能或maynot有一个参数，以类似的方式为默认获取？

What do you have to do to return a action that may or maynot have a parameter in a similar manner to the default Get?

更新1
作为勒的Cuong建议，改变路线的帮助顺序，路线现在：

Update 1 As Cuong Le suggested, changing the ordering of routes helped, the routes are now:

 routes.MapHttpRoute(
            name: "ActionApi",
            routeTemplate: "api/{controller}/{action}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );

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

        routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
        );

我不得不删除行动=从ActionApi路线，否则标准获取其他控制器停止工作（即API /值）

I had to remove action = "" from the ActionApi route otherwise the standard Get on the other controllers stopped working (i.e. api/values)

API /测试/主动现已解决，但现在我得到了500内部服务器错误的/ API /测试它possile同时拥有议决，所以API /测试将返回所有和/测试/活跃，只有回归一些？

api/test/active is now resolving, but I now get a 500 Internal Server Error for /api/test is it possile to have both resolves, so api/test would return "all" and /test/active only return "some"?

推荐答案

要做到这一点是提供参数的默认值的一种方式，

One way to do it is to provide a default value for the parameter,

[HttpGet]
public String Active(int id = 0)
{
    var result = new List<string> { "active1", "active2" };

    if (id == 0) {
      return result;
    } else {
      return result[id];
    }
}

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