c# - 如何从json对象中获取key并转换为数组？

Question

{
 "Date": "2016-12-15",
 "Data": {
   "A": 4.4023,
   "AB": 1.6403,
   "ABC": 2.3457
 }
}

如何将我的键 A、Ab、ABC 放入数组中？只是键而不是值。

Answer 1

您可以安装json.net并使用LINQ to JSON查询属性:

var jsonString = @"{
     ""Date"": ""2016-12-15"",
     ""Data"": {
       ""A"": 4.4023,
       ""AB"": 1.6403,
       ""ABC"": 2.3457
     }
}";

var root = JToken.Parse(jsonString);

var properties = root
    // Select nested Data object
    .SelectTokens("Data")
    // Iterate through its children, return property names.
    .SelectMany(t => t.Children().OfType<JProperty>().Select(p => p.Name))
    .ToArray();

Console.WriteLine(String.Join(",", properties)); // Prints A,AB,ABC

样本fiddle .