Json.Net 设置属性名称为数字

Question

有没有更简洁的方法来实现这一目标？

public class Sidebar
{
    [JsonProperty("0")]
    public string Hurry = "hurry";

    [JsonProperty("1")]
    public string Dont_Spam_This_Button = "don't spam this button";

    [JsonProperty("2")]
    public string Navigation = "navigation";

    [JsonProperty("3")]
    public string Overview = "overview";

我想对对象进行编号，那么有没有一种方法可以通过编程来代替使用属性和手动计数？

Answer 1

当你想要的更像 ["hurry",...,"overview"]

时，你正在做的事情会给你类似 {"0":"hurry",...,"3":"overview"} 的东西

您可以做的是创建一个自定义 converter/serializer，或者如果您不需要在 .net 中自动 serialization/deserialization，只需在 [=19= 中序列化一个对象 [] 数组] 方法...

public string AsJson()
{
  return JsonConvert.SerializeObject(new object[] {
    Hurry, Dont_Spam_This_Button, Navigation, Overview
  });
}

Answer 2

是的，您可以使用像这样的自定义 JsonConverter 获得您想要的结果：

class NumberedPropertiesConverter : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        return true;
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        JObject jo = new JObject();
        int count = 0;

        foreach (MemberInfo member in value.GetType().GetMembers())
        {
            object memberVal = null;
            if (member.MemberType == MemberTypes.Field)
            {
                memberVal = ((FieldInfo)member).GetValue(value);
            }
            else if (member.MemberType == MemberTypes.Property)
            {
                memberVal = ((PropertyInfo)member).GetValue(value);
            }
            else
            {
                continue;
            }

            JToken token = memberVal != null ? JToken.FromObject(memberVal, serializer) : null;
            jo.Add(count.ToString(), token);
            count++;
        }

        jo.WriteTo(writer);
    }

    public override bool CanRead
    {
        get { return false; }
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        throw new NotImplementedException();
    }
}

要使用转换器，只需用 [JsonConverter] 属性标记您的 class，指定自定义转换器的类型：

[JsonConverter(typeof(NumberedPropertiesConverter))]
public class Sidebar
{
    ...
}

重要说明：properties/fields 将根据 Type.GetMembers() 方法返回的顺序进行编号。通常，这将匹配 class 中声明的顺序；但是，如果您混合使用 public 属性和 public 字段，则所有属性将在所有字段之前返回。

这是一个演示：

public class Program
{
    public static void Main()
    {
        Sidebar sb = new Sidebar();
        string json = JsonConvert.SerializeObject(sb, Formatting.Indented);
        Console.WriteLine(json);
    }
}

[JsonConverter(typeof(NumberedPropertiesConverter))]
public class Sidebar
{
    public string Foo { get { return "foo property"; } }
    public string Hurry = "hurry";
    public string Dont_Spam_This_Button = "don't spam this button";
    public string Navigation = "navigation";
    public string Overview = "overview";
    public string Bar { get { return "bar property"; } }
}

输出：

{
  "0": "foo property",
  "1": "bar property",
  "2": "hurry",
  "3": "don't spam this button",
  "4": "navigation",
  "5": "overview"
}

Fiddle: https://dotnetfiddle.net/aZ51qv

Json.Net 设置属性名称为数字

Json.Net setting property name as numbers

serialization

json

json.net

Json.Net 设置 属性 名称为数字

Json.Net setting property name as numbers

serialization

json

json.net

Json.Net 设置属性名称为数字