使用动态元素名称反序列化 JSON [重复]

Question

我有一个我正在尝试反序列化的 JSON 文件，但是 items 数组中有一个标签正在更改，那么如何在类描述中指定它，请参阅下面的类描述。

当我反序列化时，我收到以下消息： GetRapidAPIDataForSymbols 中的错误：无法将当前 JSON 对象（例如 {"name":"value"}）反序列化为类型“System.Collections.Generic.List`1[MarketDataProvider.YahooHistory+RapidAPIItem]”，因为该类型需要正确反序列化的 JSON 数组（例如 [1,2,3]）。

The JSON:

{
    "meta": {
        "currency": "EUR",
        "symbol": "UZU.DE",
        "exchangeName": "GER",
        "instrumentType": "EQUITY",
        "firstTradeDate": 911462400,
        "regularMarketTime": 1604397503,
        "gmtoffset": 3600,
        "timezone": "CET",
        "exchangeTimezoneName": "Europe/Berlin",
        "regularMarketPrice": 50.2,
        "chartPreviousClose": 51,
        "priceHint": 2,
        "dataGranularity": "1d",
        "range": ""
    },
    "items": {
        "1340002800": {
            "date": "18-06-2012",
            "open": 19.05,
            "high": 19.05,
            "low": 19.05,
            "close": 19.05,
            "adjclose": 16.09
        },
        "1340089200": {
            "date": "19-06-2012",
            "open": 19.04,
            "high": 19.05,
            "low": 19.04,
            "close": 19.04,
            "adjclose": 16.09
        },
        "1340175600": {
            "date": "20-06-2012",
            "open": 19.04,
            "high": 19.04,
            "low": 19.04,
            "close": 19.04,
            "adjclose": 16.09
        },
        "1340262000": {
            "date": "21-06-2012",
            "open": 19.05,
            "high": 19.05,
            "low": 19.05,
            "close": 19.05,
            "adjclose": 16.09
        },
        "1604397503": {
            "date": "03-11-2020",
            "open": 50.6,
            "high": 50.6,
            "low": 50.2,
            "close": 50.2,
            "adjclose": 50.2
        }
    },
    "error": null
}
My classes:


public class Meta
{
    public string currency { get; set; }
    public string symbol { get; set; }
    public string exchangeName { get; set; }
    public string instrumentType { get; set; }
    public long? firstTradeDate { get; set; }
    public long? regularMarketTime { get; set; }
    public int? gmtoffset { get; set; }
    public string timezone { get; set; }
    public string exchangeTimezoneName { get; set; }
    public decimal? regularMarketPrice { get; set; }
    public decimal? chartPreviousClose { get; set; }
    public decimal? previousClose { get; set; }
    public int? scale { get; set; }
    public int? priceHint { get; set; }
    public string dataGranularity { get; set; }
    public string range { get; set; }
}

public class RapidAPIHistoryResponse
{
    [XmlElement("meta")]
    public Meta meta { get; set; }
    [XmlElement("items")]
    public List<RapidAPIItem> items { get; set; }
    public object error { get; set; }
}
public class RapidAPIItem
{
    string dateTag { get; set; }
    public YahooPrice item { get; set; }
}


My code:
var client = new RestClient("https://yahoo-finance15.p.rapidapi.com/api/yahoo/hi/history/UZU.DE/1d);
                var request = new RestRequest(Method.GET);
                request.AddHeader("x-rapidapi-host", "yahoo-finance15.p.rapidapi.com");
                request.AddHeader("x-rapidapi-key", StartParameters.RapidAPIKey);
                IRestResponse response = client.Execute(request);
                YahooHistory.RapidAPIHistoryResponse history = JsonConvert.DeserializeObject<YahooHistory.RapidAPIHistoryResponse>(response.Content);

Answer 1

只要你尊重物品词典的关键：

public Dictionary<string, Item> Items { get; set; }

在示例中：

 "items": {
    "1340002800": {
        //...
    },
    "1340089200": {
      //...
    },

1340002800 和 1340089200 是 C# 类型字典的键，如下所示：

Dictionary<string, T> myDictionary  

所以你需要key是一个字符串，然后是自定义对象。

这还可以让您对“列表”中的每个项目进行操作：

var myResult = yahooQuotes.Items.Where(w => w.Item.High - w.Item.Low > 5).Select(s => s.Key);

Answer 2

在您的 Json 中有“items”：{....} 使用“{}”您说 items 是一个对象。但是您希望“项目”成为一个数组“[]”。所以你的 Json 应该更像

"items" : [{"1604397503": {
        "date": "03-11-2020",
        "open": 50.6,
        "high": 50.6,
        "low": 50.2,
        "close": 50.2,
        "adjclose": 50.2
    }},{"1340262000": {
        "date": "21-06-2012",
        "open": 19.05,
        "high": 19.05,
        "low": 19.05,
        "close": 19.05,
        "adjclose": 16.09
    },

}]