用于序列化十进制值的 JSON 标准不提供本地化格式。 (看JSON.org.) 这就是为什么值始终采用不变区域性进行格式化的原因。
如果您需要本地化值,那么您需要为您选择的序列化器创建一个自定义转换器,它将小数输出为预格式化字符串。在 Json.Net 中,这可以很容易地完成,如下所示:
class Program
{
static void Main(string[] args)
{
List<decimal> values = new List<decimal> { 1.1M, 3.14M, -0.9M, 1000.42M };
var converter = new FormattedDecimalConverter(CultureInfo.GetCultureInfo("fr-FR"));
string json = JsonConvert.SerializeObject(values, converter);
Console.WriteLine(json);
}
}
class FormattedDecimalConverter : JsonConverter
{
private CultureInfo culture;
public FormattedDecimalConverter(CultureInfo culture)
{
this.culture = culture;
}
public override bool CanConvert(Type objectType)
{
return (objectType == typeof(decimal) ||
objectType == typeof(double) ||
objectType == typeof(float));
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
writer.WriteValue(Convert.ToString(value, culture));
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
throw new NotImplementedException();
}
}
Output:
["1,1","3,14","-0,9","1000,42"]