将Unix时间戳转换为Date、Json属性动态生成反序列化、序列化指定属性

public class Test
{
    [JsonIgnore]
    public string GetDate
    {
        get
        {
            return GetTime.ToString("yyyy-MM-dd");
        }
    }
    [JsonProperty(PropertyName = "get")]
    [JsonConverter(typeof(UnixDateTimeConverter))]
    public DateTime GetTime { get; set; }

    [JsonProperty(PropertyName = "ns")]
    public Dictionary<Int64, string> Ns { get; set; }

    [JsonProperty]
    private int Height { get; set; }
}

using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using Newtonsoft.Json.Serialization;
public class LimitPropsContractResolver : DefaultContractResolver
{
    private string[] props = null;

    public LimitPropsContractResolver(string[] props)
    {
        this.props = props;
    }

    protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
    {
        IList<JsonProperty> list = base.CreateProperties(type, memberSerialization);

        //只保留清單有列出的屬性
        return list.Where(p => props.Contains(p.PropertyName)).ToList();
    }
}

var textJson = "{\"get\":1245736642,\"ns\":{\"123\":\"秋香\",\"5927\":\"华安\",\"11232\":\"小强\"}}";
var model = Newtonsoft.Json.JsonConvert.DeserializeObject<Test>(textJson);
var settings = new JsonSerializerSettings();
settings.ContractResolver = new LimitPropsContractResolver("get,ns".Split(','));
var json = Newtonsoft.Json.JsonConvert.SerializeObject(model, settings);
//{"get":1245736642,"ns":{"123":"秋香","5927":"华安","11232":"小强"}}
var json2 = Newtonsoft.Json.JsonConvert.SerializeObject(model);
//{"get":1245736642,"ns":{"123":"秋香","5927":"华安","11232":"小强"},"Height":0}