C# JSON 将字典序列化为 {key :value, ...} 而不是 {key :key, value :value, ...}

Question

是否可以使用 DataContractJsonSerializer 将 .Net Dictionary 序列化为 JSON，其格式为:

{
  key0:value0,
  key1:value1,
  ...
}

我使用字典 ，因为没有预定义的输入结构。

我对 DataContractJsonSerializer 结果很感兴趣!我已经找到了一个“Surrogate”的例子，但是输出中有一个额外的“数据”，如果字典 是，转义也是假的。

---

我找到了解决方案，多么需要!首先，一个可序列化的“字典”类:(当然，这个示例只以一种方式工作，但我不需要反序列化)

[Serializable]
public class MyJsonDictionary<K, V> : ISerializable {
    Dictionary<K, V> dict = new Dictionary<K, V>();

    public MyJsonDictionary() { }

    protected MyJsonDictionary( SerializationInfo info, StreamingContext context ) {
        throw new NotImplementedException();
    }

    public void GetObjectData( SerializationInfo info, StreamingContext context ) {
        foreach( K key in dict.Keys ) {
            info.AddValue( key.ToString(), dict[ key ] );
        }
    }

    public void Add( K key, V value ) {
        dict.Add( key, value );
    }

    public V this[ K index ] {
        set { dict[ index ] = value; }
        get { return dict[ index ]; }
    }
}

用法:

public class MainClass {
    public static String Serialize( Object data ) {
        var serializer = new DataContractJsonSerializer( data.GetType() );
        var ms = new MemoryStream();
        serializer.WriteObject( ms, data );

        return Encoding.UTF8.GetString( ms.ToArray() );
    }

    public static void Main() {
        MyJsonDictionary<String, Object> result = new MyJsonDictionary<String, Object>();
        result["foo"] = "bar";
        result["Name"] = "John Doe";
        result["Age"] = 32;
        MyJsonDictionary<String, Object> address = new MyJsonDictionary<String, Object>();
        result["Address"] = address;
        address["Street"] = "30 Rockefeller Plaza";
        address["City"] = "New York City";
        address["State"] = "NY";

        Console.WriteLine( Serialize( result ) );

        Console.ReadLine();
    }
}

结果:

{
      "foo":"bar",
      "Name":"John Doe",
      "Age":32,
      "Address":{
         "__type":"MyJsonDictionaryOfstringanyType:#Json_Dictionary_Test",
         "Street":"30 Rockefeller Plaza",
         "City":"New York City",
         "State":"NY"
      }
   }

Answer 1

Json.NET 会这样做...

Dictionary<string, string> values = new Dictionary<string, string>();
values.Add("key1", "value1");
values.Add("key2", "value2");

string json = JsonConvert.SerializeObject(values);
// {
//   "key1": "value1",
//   "key2": "value2"
// }

更多示例: Serializing Collections with Json.NET