似乎无法从数组反序列化为强类型列表对象

Question

我正在尝试反序列化使用以下 Json 和类：

List<Root> OBJTEST = (List<Root>)Newtonsoft.Json.JsonConvert.DeserializeObject(response, typeof(List<Root>));

Answer 1

你那里没有数组值。 您应该反序列化到对象Root obj = Newtonsoft.Json.JsonConvert.DeserializeObject<Root>(response)<\/code> 。

{
"Meta Data": {
    "1. Information": "Daily Prices (open, high, low, close) and Volumes",
    "2. Symbol": "IBM",
    "3. Last Refreshed": "2022-02-04",
    "4. Output Size": "Compact",
    "5. Time Zone": "US/Eastern"
},
"Time Series (Daily)": {
    "2022-02-04": {
        "1. open": "137.8600",
        "2. high": "138.8200",
        "3. low": "136.2150",
        "4. close": "137.1500",
        "5. volume": "4142045"
    },
    "2022-02-03": {
        "1. open": "137.0000",
        "2. high": "138.7600",
        "3. low": "135.8310",
        "4. close": "137.7800",
        "5. volume": "6100777"
    }
  }
}

Answer 2

试试这个

    string json = string.Empty;
    using (var client = new HttpClient())
    {
        var baseAddress = "https://www.alphavantage.co";
        var api = "/query?function=TIME_SERIES_DAILY&symbol=IBM&apikey=demo";

        client.BaseAddress = new Uri(baseAddress);
        var contentType = new MediaTypeWithQualityHeaderValue("application/json");
        client.DefaultRequestHeaders.Accept.Add(contentType);
        var response = client.GetAsync(api).Result;
        if (response.IsSuccessStatusCode)
            json = response.Content.ReadAsStringAsync().Result;
    }
    Data data =JsonConvert.DeserializeObject<Data>(json);

你可以得到 TimeSeriesDaily 列表

List<TimeSeriesDaily> timeSeriesDaily = data.TimeSeriesDaily.Select(tsd => AddDate(tsd) ).ToList();

private TimeSeriesDaily AddDate(KeyValuePair<string, TimeSeriesDaily> tsdd)
{
    var tsd=tsdd.Value;
    tsd.Date=tsdd.Key;
    return tsd;
}

班级

public partial class Data
    {
        [JsonProperty("Meta Data")]
        public MetaData MetaData { get; set; }

        [JsonProperty("Time Series (Daily)")]
        public Dictionary<string, TimeSeriesDaily> TimeSeriesDaily { get; set; }
    }

    public partial class MetaData
    {
        [JsonProperty("1. Information")]
        public string The1Information { get; set; }

        [JsonProperty("2. Symbol")]
        public string The2Symbol { get; set; }

        [JsonProperty("3. Last Refreshed")]
        public DateTimeOffset The3LastRefreshed { get; set; }

        [JsonProperty("4. Output Size")]
        public string The4OutputSize { get; set; }

        [JsonProperty("5. Time Zone")]
        public string The5TimeZone { get; set; }
    }

public partial class TimeSeriesDaily
{
    [JsonIgnore]
    public string Date { get; set; }
    
    [JsonProperty("1. open")]
    public string The1Open { get; set; }

    [JsonProperty("2. high")]
    public string The2High { get; set; }

    [JsonProperty("3. low")]
    public string The3Low { get; set; }

    [JsonProperty("4. close")]
    public string The4Close { get; set; }

    [JsonProperty("5. volume")]
    public long The5Volume { get; set; }
}