Question

我有一个要反序列化的JSON文件，但是items数组中有一个正在更改的标签，因此如何在类说明中指定它，请参阅下面的类说明。

反序列化时，出现以下消息： 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JSON数组（例如[1,2,3]）可以正确反序列化。

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

只要您遵守《物品词典》的钥匙：

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

在示例中：

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

1340002800和1340089200是C＃类型的Dictionary的键，如下所示：

Dictionary<string, T> myDictionary

因此，您需要键为字符串，然后是自定义对象。

这还将使您可以处理“列表”中的每个项目：

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

Answer 2

在Json中，您具有“项目”：{....}用“ {}”表示项目是一个对象。但是您希望“项目”成为“ []”。所以你杰森应该更像

 You passed an id of value {{id}}

}]

使用动态元素名称反序列化JSON

2 个答案: