Question

我有以下对象，我正在尝试使用Json.NET将其序列化为Json

[Serializable]
public class FlightSelection : IEquatable<FlightSelection>
{
    public static readonly DateTime InitialDate;

    public FlightSelection();

    public FlightWeekSelectionType FlightWeekSelectionType { get; set; }
    public bool IsValidProposalLineWeeksExists { get; }
    public int Play { get; set; }
    public List<ProposalLineWeek> ProposalLineWeeks { get; set; }
    public int SelectedCount { get; }
    public int Skip { get; set; }

    public void ApplyPattern();
    public bool Equals(FlightSelection other);
    public override bool Equals(object obj);
    public bool[] ToBoolArray();
    public override string ToString();
}

我尝试使用以下代码对其进行序列化：

var jsSettings = new JsonSerializerSettings();
var fs = new FlightSelection();
string json = JsonConvert.SerializeObject(fs, Formatting.None, jsSettings);

我收到以下错误：The 'obj' argument is not a FlightSelection object.

我真的不明白为什么。我看到'obj'的对象中唯一的位置是Equals方法。为什么序列化程序关心方法。

我错过了一些简单的东西吗？

编辑：评论中要求的堆栈跟踪：

at CC.Fusion.Business.Model.FlightSelection.Equals（Object obj）在System.Collections.Generic.ObjectEqualityComparer 1.IndexOf(T[] array, T value, Int32 startIndex, Int32 count) at System.Array.IndexOf[T](T[] array, T value, Int32 startIndex, Int32 count) at System.Collections.Generic.List 1.IndexOf（T item） at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.CheckForCircularReference（JsonWriter writer，Object value，JsonProperty property，JsonContract contract，JsonContainerContract containerContract，JsonProperty containerProperty） at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.CalculatePropertyValues（JsonWriter writer，Object value，JsonContainerContract contract，JsonProperty member，JsonProperty property，JsonContract＆amp; memberContract，Object＆amp; memberValue） at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject（JsonWriter writer，Object value，JsonObjectContract contract，JsonProperty member，JsonContainerContract collectionContract，JsonProperty containerProperty） at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue（JsonWriter writer，Object value，JsonContract valueContract，JsonProperty member，JsonContainerContract containerContract，JsonProperty containerProperty） at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject（JsonWriter writer，Object value，JsonObjectContract contract，JsonProperty member，JsonContainerContract collectionContract，JsonProperty containerProperty） at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue（JsonWriter writer，Object value，JsonContract valueContract，JsonProperty member，JsonContainerContract containerContract，JsonProperty containerProperty） at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList（JsonWriter writer，IEnumerable values，JsonArrayContract contract，JsonProperty member，JsonContainerContract collectionContract，JsonProperty containerProperty） at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue（JsonWriter writer，Object value，JsonContract valueContract，JsonProperty member，JsonContainerContract containerContract，JsonProperty containerProperty） at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject（JsonWriter writer，Object value，JsonObjectContract contract，JsonProperty member，JsonContainerContract collectionContract，JsonProperty containerProperty） at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue（JsonWriter writer，Object value，JsonContract valueContract，JsonProperty member，JsonContainerContract containerContract，JsonProperty containerProperty） at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize（JsonWriter jsonWriter，Object value，Type objectType） at Newtonsoft.Json.JsonSerializer.SerializeInternal（JsonWriter jsonWriter，Object value，Type objectType） at Newtonsoft.Json.JsonSerializer.Serialize（JsonWriter jsonWriter，Object value，Type objectType）在Newtonsoft.Json.JsonConvert.SerializeObject（对象值，类型类型，格式化格式，JsonSerializerSettings设置）在Newtonsoft.Json.JsonConvert.SerializeObject（对象值，格式化格式，JsonSerializerSettings设置）位于c：\ Code.Net \ ClearChannel \ Sandbox \ APProxyServer \ APProxy \ APProxy.svc.cs中的APProxyServer.APProxy.GetProposal（Int32 proposalID）：第194行在SyncInvokeGetProposal（Object，Object []，Object []）在System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke（对象实例，对象[]输入，对象[]和输出）在System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin（MessageRpc＆amp; rpc）

Answer 1

如果您通过以下方式更改来自IEquitable合同的Equals方法的实现，我看了@您指定的代码（pastebin.com/WQkP45mr），它可以正常工作

public override bool Equals(object obj)
    {

        //if (obj == null) return base.Equals(obj);

        //if (!(obj is FlightSelection))
        //    throw new InvalidCastException("The 'obj' argument is not a FlightSelection object.");
        //else
        //    return Equals(obj as FlightSelection);    

        var flightSelection = obj as FlightSelection;
        if (flightSelection == null)
            return false;
        return Equals(flightSelection);
    }

我获得的结果：

{"FlightWeekSelectionType":0,"Play":1,"ProposalLineWeeks":[],"SelectedCount":0,"
Skip":1,"IsValidProposalLineWeeksExists":false}
Press any key to continue . . .

我希望这会有所帮助......

编辑：

如果您无法修改源代码，以下工作正常，我也进行了测试。

    class Program
    {
        static void Main(string[] args)
        {
            var jsSettings = new JsonSerializerSettings();
            var fs = new AngryHackerFlightSelection();
            string json = JsonConvert.SerializeObject(fs, Newtonsoft.Json.Formatting.None, jsSettings);
            Console.WriteLine(json);
        }
    }

    public class AngryHackerFlightSelection : FlightSelection
    {
        public override bool Equals(object obj)
        {
            var flightSelection = obj as FlightSelection;
            if (flightSelection == null)
                return false;
            return Equals(flightSelection);
        }
    }

无法使用Json.Net序列化对象

1 个答案: