[英]Deserialize part of json to datatable in C# using JSON.NET
這可能非常簡單,而我卻基本缺乏理解。 我正在調用一個返回JSON的API,如下所示:
{
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,
}
}
我要做的就是將結果返回到一個數據表,該表具有Timestamp,base,currency和rate列,其中timestamp和base來自那些字段,而currency和rate來自嵌套的rates部分
我已經花了整整一個上午的時間來閱讀並嘗試了許多不同的方法,說實話,我離弄清楚自己的需求還很近。 我什至無法閱讀基礎貨幣,因為顯然stuff.base是不允許的
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));
感謝David的回答,我的代碼現已正常運行:
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;
您應該反序列化為適當的C#類,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; }
}
現在您可以執行以下操作:
var result = JsonConvert.DeserializeObject<Foo>(response);
現在,使用其中的數據將變得微不足道:
var baseCurrency = result.Base;
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