Question

所以我想反序列化如下所示的Json回复：

{
"Meta Data": {
    "1. Information": "Intraday (1min) prices and volumes",
    "2. Symbol": "OMXS30",
    "3. Last Refreshed": "2018-07-11 10:03:00",
    "4. Interval": "1min",
    "5. Output Size": "Compact",
    "6. Time Zone": "US/Eastern"
},
"Time Series (1min)": {
    "2018-07-11 10:03:00": {
        "1. open": "1526.9352",
        "2. high": "1526.9522",
        "3. low": "1526.6548",
        "4. close": "1526.7195",
        "5. volume": "0"
    },
    "2018-07-11 10:02:00": {
        "1. open": "1526.3879",
        "2. high": "1527.0217",
        "3. low": "1526.3879",
        "4. close": "1526.9825",
        "5. volume": "0"
        }
    }
}

我有以下课程：

class RootObject
{
    [JsonProperty("Meta Data")]
    public Metadata metadata { get; set; }

    [JsonProperty("Time Series (1min)")]
    public TimeSeries timeSeries { get; set; }
}

class Metadata
{
    [JsonProperty("1. Information")]
    public string information { get; set; }

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

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

    [JsonProperty("4. Interval")]
    public string interval { get; set; }

    [JsonProperty("5. Output Size")]
    public string outputSize { get; set; }

    [JsonProperty("6. Time Zone")]
    public string timeZone { get; set; }
}

class TimeSeries
{
    [JsonProperty("timestamp")]
    public List<DataValues> dataValues { get; set; }
}

class DataValues
{
    [JsonProperty("1. open")]
    public float open { get; set; }

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

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

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

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

元数据的反序列化是有效的，但似乎无法使其适用于时间戳中的数据值。我认为这是因为Json属性名称随每个时间戳变化。

我想要的是每个时间戳记的值都在名为dataValues的列表中。

我正在使用Newtonsoft.Json。

我正在尝试获得这样的值：

string result = root.timeSeries.dataValues[0].close.ToString();

我得到的错误是：对象引用未设置为对象的实例。

Answer 1

由于对象的“键”会发生变化并且不会提前知道，因此您可以使用的最佳结构是Dictionary<string, DataValues>属性的timeSeries并抛弃TimeSeries课：

class RootObject
{
    [JsonProperty("Meta Data")]
    public Metadata metadata { get; set; }

    [JsonProperty("Time Series (1min)")]
    public Dictionary<string, DataValues> timeSeries { get; set; }
}

class Metadata
{
    [JsonProperty("1. Information")]
    public string information { get; set; }

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

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

    [JsonProperty("4. Interval")]
    public string interval { get; set; }

    [JsonProperty("5. Output Size")]
    public string outputSize { get; set; }

    [JsonProperty("6. Time Zone")]
    public string timeZone { get; set; }
}

class DataValues
{
    [JsonProperty("1. open")]
    public float open { get; set; }

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

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

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

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

我做了一个小提琴here

C＃Json使用更改的名称反序列化属性

1 个答案: