在web API中更改json結果

Question

我在visual studio 2015中創建了一個API。運行API時，它會按預期給我提供響應和數據。下面是我的控制器代碼

public HttpResponseMessage GetByMsn(string msn, DateTime dt) 
{   
    try 
    { 
     var before = dt.AddMinutes(-5); 
     var after = dt.AddMinutes(5); 

     var result = medEntitites.tj_xhqd 
        .Where(m => 
        m.zdjh == msn && 
        m.sjsj >= before && 
        m.sjsj <= after).Select(m => new { MSN = m.zdjh, DateTime = m.sjsj, Signal_Strength = m.xhqd }).Distinct(); 


     return Request.CreateResponse(HttpStatusCode.Found, result); 
    } 
    catch (Exception ex) 
    { 
     return Request.CreateErrorResponse(HttpStatusCode.NotFound, ex); 
    } 
} 

的WebApiConfig文件低於

config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/json")); 
config.Formatters.Remove(config.Formatters.XmlFormatter); 
config.Routes.MapHttpRoute(
    name: "GetByMsn", 
    routeTemplate: "api/{controller}/{action}/{msn}/{dt}", 
    defaults: null, 
    constraints: new { msn = @"^[0-9]+$" , dt = @"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}$" } 
    ); 

的響應是

[ 
    { 
     "MSN": "002999000077", 
     "DateTime": "2017-10-11T10:16:51", 
     "Signal_Strength": "17" 
    }, 
    { 
     "MSN": "002999000077", 
     "DateTime": "2017-10-11T10:19:01", 
     "Signal_Strength": "16" 
    }, 
    { 
     "MSN": "002999000077", 
     "DateTime": "2017-10-11T10:20:57", 
     "Signal_Strength": "16" 
    }, 
    { 
     "MSN": "002999000077", 
     "DateTime": "2017-10-11T10:22:53", 
     "Signal_Strength": "17" 
    } 
] 

我想

{"list": 
    [ 
    { 
     "MSN": "002999000077", 
     "DateTime": "2017-10-11T10:16:51", 
     "Signal_Strength": "17" 
    }, 
    { 
     "MSN": "002999000077", 
     "DateTime": "2017-10-11T10:19:01", 
     "Signal_Strength": "16" 
    }, 
    { 
     "MSN": "002999000077", 
     "DateTime": "2017-10-11T10:20:57", 
     "Signal_Strength": "16" 
    }, 
    { 
     "MSN": "002999000077", 
     "DateTime": "2017-10-11T10:22:53", 
     "Signal_Strength": "17" 
    }] 
} 

我只是想加上list名稱中的首發。我是API的新手，所以我找不到方法。

任何幫助將不勝感激。

Answer 1

創建一個匿名對象來包裝你想要的屬性的結果。

return Request.CreateResponse(HttpStatusCode.Found, new {list = result});