JsonSerializer - 序列与“N2”格式小数 [英] JsonSerializer - serialize decimal places with 'N2' formatting

问题描述

我采用序列Newtonsoft.Json.JsonSerializer小数。

I'm serializing decimals using Newtonsoft.Json.JsonSerializer.

如何设置它，只有1位小数在​​结束时用0连载十进制数。

How can I set it to serialize decimal numbers with only 1 decimal place to use 0 at the end.

即。 3.5序列化为3.50？

i.e. 3.5 serializes to "3.50"?

推荐答案

您必须写自己的自定义 JsonConverter ，并用它来拦截小数类型，这样你可以改变它如何被序列化。这里有一个例子：

You'll have to write your own custom JsonConverter and use it to intercept the decimal type so you can change how it gets serialized. Here's an example:

public class DecimalFormatConverter : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        return (objectType == typeof(decimal));
    }

    public override void WriteJson(JsonWriter writer, object value, 
                                   JsonSerializer serializer)
    {
        writer.WriteValue(string.Format("{0:N2}", value));
    }

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

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

要使用它，只需通过在这个自定义转换到 SerializeObject 方法的新实例：

To use it, simply pass in a new instance of this custom converter to the SerializeObject method:

var json = JsonConvert.SerializeObject(yourObject, new DecimalFormatConverter());

这篇关于JsonSerializer - 序列与“N2”格式小数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！