如何讀取每個鍵值

Question

我正在閱讀下面的成本值

原始數據如下：-

 { "Key":"Cost", "Value":[ { "Key":"a", "Value":5.25 }, { "Key":"b", "Value":0 }, { "Key":"c", "Value":5.25 }, { "Key":"d", "Value":0 } ] }

我的預期結果是我需要讀取 a,b,c,d 而不是數據 [“Cost”]。

我怎樣才能分別閱讀

Answer 1

// Root myDeserializedClass = JsonSerializer.Deserialize<Root>(myJsonResponse);
//myDeserializedClass.Value will contain all key and value
public class Root
{
    [JsonPropertyName("Key")]
    public string Key { get; set; }

    [JsonPropertyName("Value")]
    public List<Value> Value { get; set; }
}

public class Value
{
    [JsonPropertyName("Key")]
    public string Key { get; set; }

    [JsonPropertyName("Value")]
    public double Value { get; set; }
}

通過https://json2csharp.com/生成的類

Answer 2

最簡單的方法是將 json 轉換為字典

var costs= JObject.Parse(json)["Value"]
                  .ToDictionary(j => (string) j["Key"], j=> (decimal) j["Value"] );

decimal c  = costs["c"]; //5.25

或使用動態

var dict = JObject.Parse(json)["Value"]
                    .ToDictionary(j => (string)j["Key"], j => (object)j["Value"]);

dynamic costs = dict.Aggregate(new ExpandoObject() as IDictionary<string, object>,
                                (a, p) => { a.Add(p); return a; });
decimal c = costs.c;