15

Newtonsoft.Json の ShouldSerialize メソッドを使用して、プロパティに新しい値が割り当てられていない型オブジェクトのプロパティを防止しようとしました。しかし、私はそれを実装する方法がわからないので、これを解決するのを手伝ってください...

サンプルコードはこちら

public class Sample1
 {
   public String name{get;set;}
   public int Id{get;set;}; 
 }

そして、これは上記のクラスをプロパティの1つとして含む私のクラスです

public class Container
 {
   public String Cname{get;set;}
   public Sample1 Sample{get;set;}; 

   public bool ShouldSerializeSample()
  {
      //What should I write here to prevent the Sample property from being serialized when its properties are assigned no new values.

  }
 }
4

1 に答える 1

24

クラスの例を考えると、次のようなものを探していると思います：

public bool ShouldSerializeSample()
{
    return (Sample != null && (Sample.Id != 0 || Sample.name != null));
}

これが実際のデモです：

class Program
{
    static void Main(string[] args)
    {
        List<Container> list = new List<Container>
        {
            new Container
            {
                Cname = "Will serialize Sample because it has a name",
                Sample = new Sample1 { name = "sample 1" }
            },
            new Container
            {
                Cname = "Will serialize Sample because it has a non-zero Id",
                Sample = new Sample1 { Id = 2 }
            },
            new Container
            {
                Cname = "Will serialize Sample because it has a name and an Id",
                Sample = new Sample1 { name = "sample 3", Id = 3 }
            },
            new Container
            {
                Cname = "Will not serialize Sample because it has default values",
                Sample = new Sample1()
            },
            new Container
            {
                Cname = "Will not serialize Sample because it is null",
                Sample = null
            }
        };

        string json = JsonConvert.SerializeObject(list, Formatting.Indented);
        Console.WriteLine(json);
    }
}

public class Sample1
{
    public String name { get; set; }
    public int Id { get; set; }
}

public class Container
{
    public String Cname { get; set; }
    public Sample1 Sample { get; set; }

    public bool ShouldSerializeSample()
    {
        return (Sample != null && (Sample.Id != 0 || Sample.name != null));
    }
}

出力は次のとおりです。

[
  {
    "Cname": "Will serialize Sample because it has a name",
    "Sample": {
      "name": "sample 1",
      "Id": 0
    }
  },
  {
    "Cname": "Will serialize Sample because it has a non-zero Id",
    "Sample": {
      "name": null,
      "Id": 2
    }
  },
  {
    "Cname": "Will serialize Sample because it has a name and an Id",
    "Sample": {
      "name": "sample 3",
      "Id": 3
    }
  },
  {
    "Cname": "Will not serialize Sample because it has default values"
  },
  {
    "Cname": "Will not serialize Sample because it is null"
  }
]
于 2013-10-31T23:12:48.167 に答える