让Web API支持$format参数的方法

 1 public static class WebApiConfig
 2     {
 3         public static void Register(HttpConfiguration config)
 4         {
 5             // Web API 配置和服务
 6 
 7             // Web API 路由
 8             config.MapHttpAttributeRoutes();
 9 
10             config.Routes.MapHttpRoute(
11                 name: "DefaultApi",
12                 routeTemplate: "api/{controller}/{id}",
13                 defaults: new { id = RouteParameter.Optional }
14             );
15 
16             config.Routes.MapHttpRoute(
17                  name: "ActionApi",
18                  routeTemplate: "{controller}/{action}/{id}",
19                  defaults: new { id = RouteParameter.Optional }
20              );
21 
22             config.Formatters.JsonFormatter.AddQueryStringMapping("$format", "json", "application/json");
23             config.Formatters.XmlFormatter.AddQueryStringMapping("$format", "xml", "application/xml");
24 
25         }
26     }

WebAPI 只使用JSON格式响应

 1  public static class WebApiConfig
 2     {
 3         public static void Register(HttpConfiguration config)
 4         {
 5             // Web API 配置和服务
 6 
 7             // Web API 路由
 8             config.MapHttpAttributeRoutes();
 9 
10             config.Routes.MapHttpRoute(
11                 name: "DefaultApi",
12                 routeTemplate: "api/{controller}/{id}",
13                 defaults: new { id = RouteParameter.Optional }
14             );
15 
16             config.Routes.MapHttpRoute(
17                  name: "ActionApi",
18                  routeTemplate: "{controller}/{action}/{id}",
19                  defaults: new { id = RouteParameter.Optional }
20              );
21 
22             config.Formatters.XmlFormatter.SupportedMediaTypes.Clear();
23         }
24     }

 

使用方式
http://localhost:8081/api/home?$format=json
http://localhost:8081/api/home?$format=xml

参考资料：https://code.msdn.microsoft.com/Support-format-in-ASPNET-e3785b2a