Asp .Net Core Json deserialize to model

Question

Returns Json format data to me from an api.

However, the type of the "FuelType" property inside the object may be different. For example, 1 time comes as follows:

{
...
fuelType: "gasoline"
...
}}

But then it can happen:

{
...
fuelType: ["gasoline", "any"]
...
}}

If I set the "FuelType" property type on my model to a string, in the second case, Json will give me an error when it arrives, because it can't convert from array to string. No, if I set the type to an array, then, conversely, if a string arrives, it will issue an error because it cannot convert from a string to an array.

In this case, what should I put the "FuelType" property type in my model so that it does not make an error when deserializing?

Answer 1

try this

var fuelType = JsonConvert.DeserializeObject<MyClass>(json);

public class MyClass
{
    [JsonProperty("fuelType")]
    private JToken _fuelType;

    [JsonIgnore]
    public string[] fuelType
    {
        get {
if (_fuelType==null) return null;
 return _fuelType is JArray ? _fuelType.ToObject<string[]>() : new string[] { (string)_fuelType }; }
        set { _fuelType = JsonConvert.SerializeObject(value); }
    }
}

Answer 2

It all depends on you,what type of value you want to receive?string or List?

I tried with the codes:

public class SomeModel
    {
        public SomeModel()
        {
            fuelType = new List<string>();            
        }
        public int Id { get; set; }
        public string  Name { get; set; }
        
        public List<string> fuelType { get; set; }

        //you could move the codes to someservice
        public List<string> someresult(string a)
        {
            var targetlist = new List<string>();
            targetlist.Add(a);
            return targetlist;
        }
        public List<string> someresult(List<string> a)
        {
            var targetlist = new List<string>();
            targetlist.AddRange(a);
            return targetlist;
        }
    }

[HttpPost]
        public JsonResult SomeAction()
        {
            var somemodel = new SomeModel() { Id = 1, Name = "name" };
            var somevalue = /*"a"*/new List<string>() { "a", "b", "c" };
            var targetvalue = somemodel.someresult(somevalue);
            somemodel.fuelType.AddRange(targetvalue);
            return new JsonResult(somemodel);
        }

Result: