Deserializing base64 encoded byte arrays return different results in 2 JSON.net library versions

Question

  JObject j = JObject.Parse(\"{\'responseArray\':\'AAAAAAAAAAAAAAAAAAAAAAAAAAABAAAA\'}\");

  byte[] r = j[\"responseArray\"].ToObject(JsonSerializer.C         


        

Answer 1

The problem is that JObject has already parsed the AAAAAAAAAAAAAAAAAAAAAAAAAAABAAAA as a string (j["responseArray"].Type == JTokenType.String), so the j["responseArray"].ToObject isn't doing a de-base64.

You have to parse it directly to a byte[], like:

public class MyObject
{
    public byte[] responseArray { get; set; }
}

MyObject cl = JsonConvert.DeserializeObject("{'responseArray':'AAAAAAAAAAAAAAAAAAAAAAAAAAABAAAA'}");

Clearly you can do the Convert.FromBase64String "manually":

JObject j = JObject.Parse("{'responseArray':'AAAAAAAAAAAAAAAAAAAAAAAAAAABAAAA'}");
byte[] r = Convert.FromBase64String((string)j["responseArray"]);