Web API路由值在操作执行过滤器时为空 [英] Web api route values is empty on action executes filter

问题描述

我正在对控制器操作使用自定义操作过滤器.

I am using a custom action filter on my controller action.

我的控制器动作是这样的:

My controller action is like this:

    [HttpPost]
    [Route("listener")]   
    [MyAttr]     
    public IHttpActionResult Listener([FromBody]Parameters request)
    {
        return Ok();
    }

我想从操作过滤器访问 Route("listener")值.

I want to access Route("listener") values from action filter.

public class MyAttr: ActionFilterAttribute
{        
    public async override Task OnActionExecutedAsync(HttpActionExecutedContext actionExecutedContext, CancellationToken cancellationToken)
    {
         var route = actionExecutedContext.ActionContext.RequestContext.RouteData;       
    }
}

但是RouteData值集合没有项目.如何获取路线值?

But RouteData values collection has no items. How can access route value?

我的配置是这样的:

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        config.MapHttpAttributeRoutes();

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

推荐答案

请在您的 WebApiConfig.cs 文件中添加/{action} .

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        config.MapHttpAttributeRoutes();

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

api/ControllerName/Listener 链接就是那个.

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