WebApi/App_Start/WebApiConfig.cs
@@ -19,6 +19,22 @@
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );
            // Web API 路由
            config.Filters.Add(new CustomHandleErrorAttribute());
            //保证浏览器里面也能用
            GlobalConfiguration.Configuration.Formatters.XmlFormatter.SupportedMediaTypes.Clear();
            //默认返回 json
            GlobalConfiguration.Configuration.Formatters.JsonFormatter.MediaTypeMappings.Add(
                new System.Net.Http.Formatting.QueryStringMapping("datatype", "json", "application/json"));
            //返回格式选择 datatype 可以替换为任何参数
            GlobalConfiguration.Configuration.Formatters.XmlFormatter.MediaTypeMappings.Add(
                new System.Net.Http.Formatting.QueryStringMapping("datatype", "xml", "application/xml"));
        }
    }
}