CODEWITHSUNDEEP
json.net
FlintZA
FlintZA

Reputation: 872

How does Json.Net determine whether a property should be deserialized?

I have a class that is deserialized using JsonConvert.DeserializeObject. In that object I already had the following:

    public string Name { get; private set; }

    public uint TotalFrames { get; private set; }
    public string AttachedDetachBoneId { get; private set; }
    public string StartingBone { get; set; }

    public uint SyncFrame { get; private set; }
    public uint CycleFrames { get; private set; }
    public uint AttachDetachFrame { get; private set; }

These all get successfully deserialized from string data read from a file. I then added the following:

    public bool ForceAttachedObjectToGround { get; private set; } = true;

This does not get deserialized. I tested a few different cases and got the following results:

Based on this, I thought perhaps the property type was somehow the issue and adding three new test properties of different types:

    public bool BoolTest { get; private set; }
    public uint UintTest { get; private set; }
    public string StrTest { get; private set; }

These also did not get deserialized, unless I made the setters public or added the JsonProperty. And if I then remove the attribute/make the properties private again, deserialization once again stops working.

What is happening here? How is Json.Net deciding what to deserialize and what not to?

For completeness sake, I do specify my own JsonSerializerSettings. I have TypeNameHandling = TypeNameHandling.Objects, and I specify a custom binder. The binder is not used in this case though.

Upvotes: 0

Views: 93

Answers (1)

FlintZA
FlintZA

Reputation: 872

In this case, the (incredibly obvious) answer was that the serialization behaviour was inherited from an interface the class was implementing.:

public interface IAnimationData
{
    [JsonProperty]
    string Name { get; }

    [JsonProperty]
    uint TotalFrames { get; }

    // etc..
}

public class AnimationData :
    IAnimationData
{
    public string Name { get; private set; }
    public uint TotalFrames { get; private set; }

    // etc
}

Upvotes: 0

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