使用Json解析枚举集合。净[重复]

我有这样一个JSON:

[{ 
    "agencyId": "myCity",
    "road": {
    "note": "",
        "lat": "45.321",
        "lon": "12.21",
        "streetCode": "290",
        "street": "street1",
        "fromNumber": "",
        "toNumber": "",
        "fromIntersection": "",
        "toIntersection": ""
    },
    "changeTypes": ["PARKING_BLOCK", "ROAD_BLOCK"],
},]

像这样的课程:

public class AlertRoad : BaseAlert
{
    [JsonProperty("agencyId")]
    [JsonConverter(typeof(StringEnumConverter))]
    public AgencyType AgencyId { get; set; }

    [JsonProperty("changeTypes")]
    [JsonConverter(typeof(StringEnumConverter))]
    public ChangeType[] ChangeTypes { get; set; }

    [JsonProperty("road")]
    public Road RoadInfo { get; set; }
}

AgencyType是一种枚举,AgencyId的反序列化和序列化是有效的。

ChangeType是另一个枚举,但ChangeType的反序列化和序列化不起作用。 我假设原因是ChangeTypes是一个枚举值数组。

问题是:如何对ChangeTypes字段或枚举值数组进行反序列化/序列化?

我试图定义自己的字段转换器,称为ChangeTypeConverter,并将StrinEnumConverter更改为ChangeTypes字段的ChangeTypeConverter,但在ReadJson函数中,reader的值为null。

public class ChangeTypeConverter : JsonConverter
{
    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {

    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        var val = reader.Value;
        //val is null?!?
        return val;
    }

    public override bool CanConvert(Type objectType)
    {
        return objectType == typeof(ChangeType);
    }
}