JObject.Parse修改浮点值的结尾 [英] JObject.Parse modifies end of floating point values

问题描述

var clientString = "{\"max\":1214.704958677686}";

JObject o = JObject.Parse(clientString);

var jsonString = o.ToString();

---

jsonString的内容:

---

contents of jsonString:

{
  "max": 1214.7049586776859
}

这既要可视化对象，又要进行ToString().请注意，686已经神秘地扩展到6859(添加了精度).这对我们来说是个问题，因为数字不完全相同，并且稍后在json上的哈希函数不匹配.

this is both in visualizing the object and in doing ToString(). Note that the 686 has mysteriously been expanded to 6859 (precision added). This is a problem for us because the numbers are not exactly the same, and a hash function over the json later does not match.

推荐答案

@Ilija Dimov 是正确的-JSON. NET默认将JSON浮点解析为double.如果仍要使用JObject而不是使用完整的POCO进行反序列化，则可以使用JsonTextReader并设置FloatParseHandling选项:

@Ilija Dimov is correct--JSON.NET parses JSON floats as doubles by default. If you still want to use JObject instead of creating a full blown POCO for deserialization, you can use a JsonTextReader and set the FloatParseHandling option:

var reader = new JsonTextReader(new StringReader(clientString));
reader.FloatParseHandling = FloatParseHandling.Decimal;

JObject obj = JObject.Load(reader);

Console.WriteLine(obj["max"].Value<decimal>()); // 1214.704958677686

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