c# - 如何访问 json.net 中的子值

Question

我正在尝试解析 json 以访问子值。以下是示例 json，

jsondata = {
  "sample_data": "{"o2:{"testname":"o2","department":"chemistry","normalvalue":"l","testmethod":"j","specimen":"g","referelprice":"y","normalprice":"i","discountprice":"o"}}"
}

下面是我的代码

var _json = JObject.Parse(jsondata.ToString());
Console.WriteLine(_json["sample_data"]);

这段代码给出了输出

{"o2":{"testname":"o2","department":"chemistry","normalvalue":"l","testmethod":"j","specimen":"g","referelprice":"y","normalprice":"i","discountprice":"o"}}

现在，如果我尝试使用

获取子节点“o2”

Console.WriteLine(_json["sample_data"]["o2"]);

我收到以下错误信息

cannot access child value on newtonsoft.json.linq.jvalue

请帮助我了解如何获取子值。我想要这样的输出

{"testname":"o2","department":"chemistry","normalvalue":"l","testmethod":"j","specimen":"g","referelprice":"y","normalprice":"i","discountprice":"o"}

我怎样才能做到这一点。请帮忙。

Answer 1

在您的示例 jsondata 中，再次存储 sample_data 的值是字符串。

试试这个

var _json = JObject.Parse(jsondata.ToString());
var sampledataJson = JObject.Parse(_json["sample_data"].ToString());
Console.WriteLine(sampledataJson["o2"]);