I have a class something like this
public class A{
public Guid userId { get; set; }
public Guid businessId { get; set; }
public Dictionary<int, long> rights { get; set; }
}
And I want to covert this json to this class
{
"userId": "dc2af693-72e1-49a7-80aa-6416c6536bdf",
"businessId": "0110eea4-7a47-4a7c-95ea-10547ab49652",
"rights": "{\"19\":1,\"17\":15,\"18\":1,\"23\":1,\"1\":31,\"20\":3,\"3\":1,\"16\":0}",
}
But when Im trying to convert it with NewtonSoft.Json
JsonConvert.DeserializeObject<A>(json);
I get the following error Cannot Cast System.string to System.Dictionary<int,long> What happens is that my rights get converted to a string something like this
"{"19":1, "17":15, "18":1, ..., "16":0}"
If I deserialize this string again it works as I desire is there better method to do this.
Since the rights
is in string format, you can add custom JsonConverter
which converts the string to dictionary
public class A
{
public Guid userId { get; set; }
public Guid businessId { get; set; }
[JsonConverter(typeof(RightsSerializer))]
public Dictionary<int, long> rights { get; set; }
}
Here is the RightsSerializer
public class RightsSerializer : JsonConverter
{
public override bool CanConvert(Type objectType)
{
return objectType == typeof(Dictionary<int, long>);
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
if (reader.TokenType == JsonToken.Null) return null;
var jt = JToken.Load(reader);
return JsonConvert.DeserializeObject<Dictionary<int, long>>(jt.Value<String>());
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
serializer.Serialize(writer, value);
}
}
And DeserializeObject
var json = File.ReadAllText("json1.json");
var result = JsonConvert.DeserializeObject<A>(json);