[英]Deserialized Json object value is null
我无法从 OneDay.price_change 获得价值。 HTTP 响应正常,我得到以下信息:
HTTP 响应
"[{\"id\":\"BTC\",\"currency\":\"BTC\",\"symbol\":\"BTC\",\"name\":\"Bitcoin\",\"logo_url\":\"https://s3.us-east-2.amazonaws.com/nomics-api/static/images/currencies/btc.svg\",\"status\":\"active\",\"price\":\"60947.08258854\",\"price_date\":\"2021-10-31T00:00:00Z\",\"price_timestamp\":\"2021-10-31T18:51:00Z\",\"circulating_supply\":\"18860037\",\"max_supply\":\"21000000\",\"market_cap\":\"1149464232662\",\"market_cap_dominance\":\"0.4078\",\"num_exchanges\":\"397\",\"num_pairs\":\"67587\",\"num_pairs_unmapped\":\"5196\",\"first_candle\":\"2011-08-18T00:00:00Z\",\"first_trade\":\"2011-08-18T00:00:00Z\",\"first_order_book\":\"2017-01-06T00:00:00Z\",\"rank\":\"1\",\"high\":\"66082.82561618\",\"high_timestamp\":\"2021-10-20T00:00:00Z\",\"1h\":{\"volume\":\"1248590564.91\",\"price_change\":\"-85.32656234\",\"price_change_pct\":\"-0.0014\",\"volume_change\":\"-218879322.04\",\"volume_change_pct\":\"-0.1492\",\"market_cap_change\":\"-1607003923.65\",\"market_cap_change_pct\":\"-0.0014\"},\"1d\":{\"volume\":\"39937857069.60\",\"price_change\":\"-845.68642611\",\"price_change_pct\":\"-0.0137\",\"volume_change\":\"1918883279.43\",\"volume_change_pct\":\"0.0505\",\"market_cap_change\":\"-15892518975.54\",\"market_cap_change_pct\":\"-0.0136\"}}]\n"
但是,由于某种原因,我无法接受 1d 价格变化。 我不确定可能是什么问题。 任何帮助表示赞赏!
模型:
public class OneHour
{
public string Volume { get; set; }
public string Price_change { get; set; }
public string Price_change_pct { get; set; }
public string Volume_change { get; set; }
public string Volume_change_pct { get; set; }
public string Market_cap_change { get; set; }
public string Market_cap_change_pct { get; set; }
}
public class OneDay
{
public string Volume { get; set; }
public string Price_change { get; set; }
public string Price_change_pct { get; set; }
public string Volume_change { get; set; }
public string Volume_change_pct { get; set; }
public string Market_cap_change { get; set; }
public string Market_cap_change_pct { get; set; }
}
public class CryptoApiMain
{
public OneHour OneHour { get; set; }
public OneDay OneDay { get; set; }
public string Id { get; set; }
public string Symbol { get; set; }
public string Status { get; set; }
public double Price { get; set; }
public string Price_date { get; set; }
public string Circulating_supply { get; set; }
public string Num_exchanges { get; set; }
public string Num_pairs { get; set; }
public string Rank { get; set; }
public string High { get; set; }
}
var theresponse = settingsService.CryptoApiResult(cryptoStock).Result;
foreach (var rez in theresponse)
{
<span id="stockSymbolCrypto">@cryptoStock</span>
<p>$@Convert.ToInt64(@rez.Price) @rez.OneDay.Price_change</p>
}
@rez.OneDay.Price_change 错误弹出窗口
问题是 json ( 1d
) 中的属性名称和 c# 模型 ( OneDay
) 中的属性名称不匹配。
如果您使用System.Text.Json
(.Net Core 3.0 和更新版本),请使用以下内容
[JsonPropertyName("1d")]
public OneDay OneDay { get; set; }
如果您使用的是Newtonsoft
(.Net Core 3.0 之前),请使用以下内容
[JsonProperty(PropertyName = "1d")]
public OneDay OneDay { get; set; }
您的“ public OneHour OneHour { get; set; } ”和“ public OneDay OneDay { get; set; } ”属性应该绑定到 [JsonProperty("1h")] 和 [JsonProperty("1d")]
尝试这个
CryptoApiMain[] jsond = JsonConvert.DeserializeObject<CryptoApiMain[]>(json);
var price = jsond[0].OneDay.PriceChange;
结果
-845.68642611
班级
public partial class CryptoApiMain
{
[JsonProperty("1h")]
public One OneHour { get; set; }
[JsonProperty("1d")]
public One OneDay { get; set; }
[JsonProperty("id")]
public string Id { get; set; }
[JsonProperty("currency")]
public string Currency { get; set; }
[JsonProperty("symbol")]
public string Symbol { get; set; }
[JsonProperty("name")]
public string Name { get; set; }
[JsonProperty("logo_url")]
public Uri LogoUrl { get; set; }
[JsonProperty("status")]
public string Status { get; set; }
[JsonProperty("price")]
public string Price { get; set; }
[JsonProperty("price_date")]
public DateTimeOffset PriceDate { get; set; }
[JsonProperty("price_timestamp")]
public DateTimeOffset PriceTimestamp { get; set; }
[JsonProperty("circulating_supply")]
public long CirculatingSupply { get; set; }
[JsonProperty("max_supply")]
public long MaxSupply { get; set; }
[JsonProperty("market_cap")]
public string MarketCap { get; set; }
[JsonProperty("market_cap_dominance")]
public string MarketCapDominance { get; set; }
[JsonProperty("num_exchanges")]
public long NumExchanges { get; set; }
[JsonProperty("num_pairs")]
public long NumPairs { get; set; }
[JsonProperty("num_pairs_unmapped")]
public long NumPairsUnmapped { get; set; }
[JsonProperty("first_candle")]
public DateTimeOffset FirstCandle { get; set; }
[JsonProperty("first_trade")]
public DateTimeOffset FirstTrade { get; set; }
[JsonProperty("first_order_book")]
public DateTimeOffset FirstOrderBook { get; set; }
[JsonProperty("rank")]
public long Rank { get; set; }
[JsonProperty("high")]
public string High { get; set; }
[JsonProperty("high_timestamp")]
public DateTimeOffset HighTimestamp { get; set; }
}
public partial class One
{
[JsonProperty("volume")]
public string Volume { get; set; }
[JsonProperty("price_change")]
public string PriceChange { get; set; }
[JsonProperty("price_change_pct")]
public string PriceChangePct { get; set; }
[JsonProperty("volume_change")]
public string VolumeChange { get; set; }
[JsonProperty("volume_change_pct")]
public string VolumeChangePct { get; set; }
[JsonProperty("market_cap_change")]
public string MarketCapChange { get; set; }
[JsonProperty("market_cap_change_pct")]
public string MarketCapChangePct { get; set; }
}
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