The multiple name JsonProperty assigned to one property

Question

I have two JSON formats that I want to deserialize into one class. I know that we cannot apply two attributes [JsonProperty]to one property.

Tell me, please, how can I achieve this?

string json1 = @"
    {
        'field1': '123456789012345',
        'specifications': {
            'name1': 'HFE'
        }
    }";

string json2 = @"
    {
        'field1': '123456789012345',
        'specifications': {
            'name2': 'HFE'
        }
    }";

public class Specifications
{
    [JsonProperty("name1")]
    public string CodeModel { get; set; }
}

public class ClassToDeserialize
{
    [JsonProperty("field1")]
    public string Vin { get; set; }

    [JsonProperty("specification")]
    public Specifications Specifications { get; set; }        
}

I want name1u to name2be deserialized into a property of the name1specification class.

Answer 1

A simple solution that does not require a converter: just add the second, private property to your class, mark it [JsonProperty("name2")]and set the first property for it:

public class Specifications
{
    [JsonProperty("name1")]
    public string CodeModel { get; set; }

    [JsonProperty("name2")]
    private string CodeModel2 { set { CodeModel = value; } }
}

Fiddle: https://dotnetfiddle.net/z3KJj5

Answer 2

Trick custom JsonConverter. @khaled4vokalz, @Khanh TO

public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        object instance = objectType.GetConstructor(Type.EmptyTypes).Invoke(null);
        PropertyInfo[] props = objectType.GetProperties();

        JObject jo = JObject.Load(reader);
        foreach (JProperty jp in jo.Properties())
        {
            if (string.Equals(jp.Name, "name1", StringComparison.OrdinalIgnoreCase) || string.Equals(jp.Name, "name2", StringComparison.OrdinalIgnoreCase))
            {
                PropertyInfo prop = props.FirstOrDefault(pi =>
                pi.CanWrite && string.Equals(pi.Name, "CodeModel", StringComparison.OrdinalIgnoreCase));

                if (prop != null)
                    prop.SetValue(instance, jp.Value.ToObject(prop.PropertyType, serializer));
            }
        }

        return instance;
    }

Answer 3

JsonAlias ​​allows us to use one or more alternative names for a property during deserialization.

Try using the following annotation on your @JsonAlias ​​field ({"name1", "name2"})