找到了与该请求匹配的多个操作

链接： 

https://blog.csdn.net/pan_junbiao/article/details/84061654

 

WebApiConfig.cs

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

改为

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