How to optimize JsonResult after solving Self Referencing? - json

Question

The following image describes my model relationship between User and Room.
There is a Many to Many relationship between them,
and I have resolved the Self Reference issue by JSON.NET
and adding some configurations to the Application_Start function.
It looks like:
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
RouteConfig.RegisterRoutes(RouteTable.Routes);
JsonConvert.DefaultSettings = () => new JsonSerializerSettings
{
Formatting = Newtonsoft.Json.Formatting.Indented,
ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore
};
}
I defined a API like this to return All the users in database as Json.
public ActionResult Index()
{
return Content(JsonConvert.SerializeObject(db.UserSet), "application/json");
}
The point is , when I get a JsonResult , it looks like
(Every "User" has a navigation attribute "Room" )
[
{
"Room": [
{
"User": [
{
"Room": [],
"Id": 3,
"Name": "waterball",
"Account": "pppaass",
"Password": "123"
}
],
"Id": 1,
"Name": "sadafsa"
}
],
"Id": 2,
"Name": "waterball",
"Account": "safasfasd",
"Password": "123"
},
{
"Room": [
{
"User": [
{
"Room": [],
"Id": 2,
"Name": "waterball",
"Account": "safasfasd",
"Password": "123"
}
],
"Id": 1,
"Name": "sadafsa"
}
],
"Id": 3,
"Name": "waterball",
"Account": "pppaass",
"Password": "123"
}, ........
Obviously , the result looks complex ,
How can I get only the Id,Name but NO User attributes of each Room ?
Or what exactly is the common way people handle with this problem?
===========================================================
I have changed my codes to reach my requirement,
but is this actually the common way to resolve this...?
Or does it have some potential problems?
public ActionResult Index()
{
var result = from u in db.UserSet
select new
{
Id = u.Id,
Account = u.Account,
Password = u.Password,
Room = from r in u.Room
select new
{
Id = r.Id,
Name = r.Name
}
};
return Content(JsonConvert.SerializeObject(result), "application/json");
}