Json.net将数字属性序列化为字符串 [英] Json.net serialize numeric properties as string

问题描述

我正在使用JsonConvert.SerializeObject序列化模型对象. 服务器期望所有字段都为字符串.我的模型对象具有数字属性和字符串属性.我无法将属性添加到模型对象.有没有一种方法可以序列化所有属性值，就像它们是字符串一样?我必须仅支持序列化，而不支持反序列化.

I am using JsonConvert.SerializeObject to serialize a model object. The server expects all fields as strings. My model object has numeric properties and string properties. I can not add attributes to the model object. Is there a way to serialize all property values as if they were strings? I have to support only serialization, not deserialization.

推荐答案

即使对于数字类型，您也可以提供自己的JsonConverter.我已经尝试过了，它可以正常工作-它又快又脏，您几乎可以肯定要扩展它以支持其他数字类型(long，float，double，decimal等)，但是应该可以你要去

You can provide your own JsonConverter even for numeric types. I've just tried this and it works - it's quick and dirty, and you almost certainly want to extend it to support other numeric types (long, float, double, decimal etc) but it should get you going:

using System;
using System.Globalization;
using Newtonsoft.Json;

public class Model
{
    public int Count { get; set; }
    public string Text { get; set; }

}

internal sealed class FormatNumbersAsTextConverter : JsonConverter
{
    public override bool CanRead => false;
    public override bool CanWrite => true;
    public override bool CanConvert(Type type) => type == typeof(int);

    public override void WriteJson(
        JsonWriter writer, object value, JsonSerializer serializer)
    {
        int number = (int) value;
        writer.WriteValue(number.ToString(CultureInfo.InvariantCulture));
    }

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

class Program
{
    static void Main(string[] args)
    {
        var model = new Model { Count = 10, Text = "hello" };
        var settings = new JsonSerializerSettings
        { 
            Converters = { new FormatNumbersAsTextConverter() }
        };
        Console.WriteLine(JsonConvert.SerializeObject(model, settings));
    }
}

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