使用JSON.NET将JSON的一部分反序列化为C#中的数据表

时间:2018-08-08 09:55:37

标签: c# json.net

这可能是非常简单的,并且我基本缺乏理解。     我正在调用一个API,该API返回如下所示的JSON:

{
    disclaimer: "https://openexchangerates.org/terms/",
    license: "https://openexchangerates.org/license/",
    timestamp: 1449877801,
    base: "USD",
    rates: {
        AED: 3.672538,
        AFN: 66.809999,
        ALL: 125.716501,
        AMD: 484.902502,
        ANG: 1.788575,
        AOA: 135.295998,
        ARS: 9.750101,
        AUD: 1.390866,
    }
}   

我要做的就是将结果返回到具有列的数据表中 时间戳记,基准,货币和汇率 时间戳和基准来自这些字段,货币和汇率来自嵌套的汇率部分

我已经花了整整一个上午的时间来阅读并尝试了许多不同的方法,说实话,我离弄清楚自己的需求还很近。我什至无法阅读基础货币,因为显然stuff.base是不允许的

var response = httpClient.GetStringAsync(new Uri(url)).Result;

JObject jsonResponse = JObject.Parse(response);
CurrentContext.Message.Display(response);

dynamic stuff = JsonConvert.DeserializeObject(response);

var timestamp = stuff.timestamp;
CurrentContext.Message.Display("TIMESTAMP IS :"+ timestamp);

var basecur = stuff.base;
CurrentContext.Message.Display("TIMESTAMP IS :" + basecur);


DataTable outputData = new DataTable();
outputData.Columns.Add("timestamp", typeof(System.String));
outputData.Columns.Add("basecurrency", typeof(System.String));
outputData.Columns.Add("currency", typeof(System.String));
outputData.Columns.Add("rate", typeof(System.Int16));

感谢大卫的回答,我的代码现已生效:

var response = httpClient.GetStringAsync(new Uri(url)).Result;
            var result = JsonConvert.DeserializeObject<Deserialize>(response);

            DataTable outputData = new DataTable();
            outputData.Columns.Add("timestamp", typeof(System.String));
            outputData.Columns.Add("basecurrency", typeof(System.String));
            outputData.Columns.Add("currency", typeof(System.String));
            outputData.Columns.Add("rate", typeof(System.Decimal));

            foreach (KeyValuePair<string, double> entry in result.Rates)
            {

                outputData.Rows.Add(result.Timestamp,result.Base,entry.Key,entry.Value);
            }

            return outputData;

1 个答案:

答案 0 :(得分:3)

您应该反序列化为适当的C#类,例如:

public class Foo
{
    public string Disclaimer { get; set; }
    public string License { get; set; }
    public int Timestamp { get; set; }
    public string Base { get; set; }
    public Dictionary<string, double> Rates { get; set; }
}

现在您可以执行以下操作:

var result = JsonConvert.DeserializeObject<Foo>(response);

现在使用那里的数据将变得很简单:

var baseCurrency = result.Base;