Question

我从API中获取数据，如下所示：

{
    created_utc: 1442108087,
    body: "test"
}

这是我用于反序列化的强类型类：

public class Comment
{
    [JsonProperty("created_utc")]
    public DateTime CreatedUtc { get; set; }

    [JsonProperty("body")]
    public string Body { get; set; }
}

如何使用Json.Net解析这个created_utc属性，这个属性是JS编号格式，以C＃格式表示为UTC时的日期时间？

Answer 1

你可以试试这个

[JsonProperty("created_utc")]
[JsonConverter(typeof(UTCDateTimeConverter))]
public DateTime CreatedUtc { get; set; }

public class UTCDateTimeConverter : JsonConverter
{
    public override object ReadJson(
        JsonReader reader,
        Type objectType,
        object existingValue,
        JsonSerializer serializer)
    {
        long ts = serializer.Deserialize<long>(reader);

        return TimeUtils.GetMbtaDateTime(ts);
    }

    public override  bool CanConvert(Type type)
    {
        return typeof(DateTime).IsAssignableFrom(type);
    }

    public override void WriteJson(
        JsonWriter writer,
        object value,
        JsonSerializer serializer)
    {
        throw new NotImplementedException();
    }

    public override bool CanRead
    { 
        get { return true; } 
    }
}

对我来说可能更容易的另一种方法

[JsonProperty(ItemConverterType = typeof(UTCDateTimeConverter))]
public DateTime CreatedUtc { get; set; }

var AllComments = JsonConvert.DeserializeObject<Comment>(json, new UTCDateTimeConverter());

public class UTCDateTimeConverter : Newtonsoft.Json.JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        return objectType == typeof(DateTime);
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        return new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddSeconds((long)reader.Value);
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        throw new NotImplementedException();
    }
}

将UTC秒整数转换为DateTime属性

1 个答案: