Web Api json response $id variable

Question

in asp web api i have this controller that respond to ajax request and send back json data: ``` public IEnumerable<PersonaleDTO> GetPersonale() { var n = (from p in db.Personale select new PersonaleDTO { Id = p.Id, Nome = p.Nome, Cognome = p.Cognome Cellulare = p.Cellulare, Email = p.Email, Attivo = (bool)p.Attivo }).ToList(); return n; } ``` This method return seven object and it's correct. Now when i receive back the data in the json format i see that i receive also and $id member along with the id, Nome, Cognome... What is the $id variable? How can remove this from the json response?

Accepted Answer

Try this code in `WebApiConfig`

```
var json = config.Formatters.JsonFormatter;
json.SerializerSettings.PreserveReferencesHandling = Newtonsoft.Json.PreserveReferencesHandling.None;
```

Edit : If for some reason you're using a custom ContractResolver then as per this post

The custom ContractResolver setting overrides the PreserveReferencesHandling setting.

In your implementation of DefaultContractResolver/IContractResolver, add this;

```
public override JsonContract ResolveContract(Type type) {
    var contract = base.ResolveContract(type);
    contract.IsReference = false;
    return contract;
}
```

This behaves similarly to the PreserveReferencesHandling.None setting without a custom ContractResolver.

Web Api json response $id variable

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