Question

我正在使用最新的（4.5）版本的Newtonsoft Json.Net来序列化我的WCF Web服务返回的复杂类型。出于某种原因，如果我应用[JsonProperty]属性，则字段不会序列化：

    [DataContract]
[JsonObject(MemberSerialization = Newtonsoft.Json.MemberSerialization.OptIn)]
public class ScalarResult
{
    [JsonProperty(Order = 0)]
    public string QueryId { get; set; }

    [JsonProperty(Order = 1)]
    public float CurrentPeriodValue { get; set; }

    [JsonProperty(Order = 2)]
    public bool HasPriorValue { get; set; }

    [JsonProperty(Order = 3)]
    public float PriorPeriodValue { get; set; }

    [JsonProperty(Order = 4)]
    public float ChangeOverPrior { get; set; }

    [JsonProperty(Order = 5)]
    public float ChangeOverPriorPercent { get; set; }

这导致了一个吝啬的回归对象：

{
"SomethingElse": "why am I the only thing visible?"
}

如果我将[DataMember]添加到每个字段（I'm not supposed to have to do，根据Json.NET文档），则会显示字段，但忽略(Order = x)属性，我相信Json.NET可能实际上并没有进行序列化：

[DataContract]
[JsonObject(MemberSerialization = Newtonsoft.Json.MemberSerialization.OptIn)]
public class ScalarResult
{
    [DataMember]
    [JsonProperty(Order = 0)]
    public string QueryId { get; set; }

    [DataMember]
    public string SomethingElse { get; set; }

    [DataMember]
    [JsonProperty(Order = 1)]
    public float CurrentPeriodValue { get; set; }

    [DataMember]
    [JsonProperty(Order = 2)]
    public bool HasPriorValue { get; set; }

    [DataMember]
    [JsonProperty(Order = 3)]
    public float PriorPeriodValue { get; set; }

    [DataMember]
    [JsonProperty(Order = 4)]
    public float ChangeOverPrior { get; set; }

    [DataMember]
    [JsonProperty(Order = 5)]
    public float ChangeOverPriorPercent { get; set; }

导致（错误的订单）：

{
"ChangeOverPrior": 8,
"ChangeOverPriorPercent": 0.25,
"CurrentPeriodValue": 40,
"HasPriorValue": true,
"PriorPeriodValue": 32,
"QueryId": "CitiesMonitored_count",
"SomethingElse": "why am I the only thing visible?"
}

关于如何验证Json.Net是否正在进行序列化的任何想法，如果是，为什么(Order =)属性被忽略？

Answer 1

正如@Jonathan Holland指出的那样，尽管有我的属性标记，但我实际上并没有使用Json.Net进行序列化。我必须实施a custom message formatter才能做到这一点。幸运的是，我想要做的事情可以用常规DataContractSerializer完成，this blog post explains。

所以这将解决问题：

    [DataContract]
public class ScalarResult
{
    [DataMember(Order = 0)]
    public string QueryId { get; set; }

    [DataMember(Order = 1)]
    public float CurrentPeriodValue { get; set; }

    [DataMember(Order = 2)]
    public bool HasPriorValue { get; set; }

    [DataMember(Order = 3)]
    public float PriorPeriodValue { get; set; }

    [DataMember(Order = 4)]
    public float ChangeOverPrior { get; set; }

    [DataMember(Order = 5)]
    public float ChangeOverPriorPercent { get; set; }

    // rest of code here
    }

现在结果符合预期：

{
    "QueryId": "SystemsMonitored_count",
    "CurrentPeriodValue": 60,
    "HasPriorValue": true,
    "PriorPeriodValue": 47,
    "ChangeOverPrior": 13,
    "ChangeOverPriorPercent": 0.276595742
}

JSON.Net在JsonProperty设置时没有序列化？

1 个答案: