我使用MetadataType
来定义Json.NET属性,用于以下类型,然后在其ToString()
方法中使用Json.NET进行序列化:
namespace ConsoleApp1
{
public interface ICell
{
int Id { get; }
}
public interface IEukaryote
{
System.Collections.Generic.IEnumerable<ICell> Cells { get; }
string GenericName { get; }
}
public sealed partial class PlantCell
: ICell
{
public int Id => 12324;
}
public sealed partial class Plant
: IEukaryote
{
private readonly System.Collections.Generic.IDictionary<string, object> _valuesDict;
public Plant()
{
_valuesDict = new System.Collections.Generic.Dictionary<string, object>();
var cells = new System.Collections.Generic.List<PlantCell>();
cells.Add(new PlantCell());
_valuesDict["Cells"] = cells;
_valuesDict["GenericName"] = "HousePlant";
}
public System.Collections.Generic.IEnumerable<ICell> Cells => _valuesDict["Cells"] as System.Collections.Generic.IEnumerable<ICell>;
public string GenericName => _valuesDict["GenericName"] as string;
public int SomethingIDoNotWantSerialized => 99999;
public override string ToString()
{
return Newtonsoft.Json.JsonConvert.SerializeObject(this,
new Newtonsoft.Json.JsonSerializerSettings()
{
ContractResolver = new Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver()
}
);
}
}
[System.ComponentModel.DataAnnotations.MetadataType(typeof(PlantMetadata))]
public sealed partial class Plant
{
[Newtonsoft.Json.JsonObject(Newtonsoft.Json.MemberSerialization.OptIn)]
internal sealed class PlantMetadata
{
[Newtonsoft.Json.JsonProperty]
public System.Collections.Generic.IEnumerable<ICell> Cells;
[Newtonsoft.Json.JsonProperty]
public string GenericName;
//...
}
}
class Program
{
static void Main(string[] args)
{
var plant = new Plant();
System.Console.WriteLine(System.String.Format("Output is {0}", plant.ToString()));
System.Console.ReadKey();
}
}
}
我的问题是
Plant.ToString()
将返回'{}'. 为什么会这样?之前它是工作的。我唯一做出的更改是在PlantMetadata
中,我将MemberSerialization
更改为OptIn,而不是OptOut,因为我希望包含的属性比留下的属性少。