CODEWITHSUNDEEP
c#json.net
Toolkit
Toolkit

Reputation: 11119

JsonConvert.DeserializeObject converts null to empty object

Seems like a bug to me. 

var obj = JsonConvert.DeserializeObject<dynamic>("{\"arr\": [{\"prop1\": null}]}");
var prop1 = ob.arr[0].prop1; // has {} value
var test = ob.arr[0].prop1?.prop2; //causes error

'Newtonsoft.Json.Linq.JValue' does not contain a definition for 'prop2'

Upvotes: 2

Views: 605

Answers (1)

didymus
didymus

Reputation: 270

ob.arr[0].prop1 is not null (it is a non-null empty JValue), so the null coalescing operator doesn't halt the access chain.

Instead ob.arr[0].prop1.Value is null, so you may use:

var test = obj.arr[0].prop1.Value?.prop2;

or

var test = obj.arr[0].prop1.HasValues
  ? obj.arr[0].prop1.prop2 // this will be null in your case
  : null;

Upvotes: 2

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