所以我目前正在尝试反序列化一个 JSON API。我使用的代码与我成功用于其他 API 的代码相同。但是每个变量都只返回 0。
public class RootObject
{
public int lat { get; set; }
public int lon { get; set; }
public DateTime date_iso { get; set; }
public int date { get; set; }
public double value { get; set; }
}
public class UVGetter
{
public static async Task<RootObject> UVApiProxy(double lat, double lon)
{
var Timestamp = new DateTimeOffset(DateTime.UtcNow).ToUnixTimeSeconds();
var http = new HttpClient();
string WeatherApiKey = "secret";
var url = String.Format($"https://api.openweathermap.org/data/2.5/uvi/history?appid=" + WeatherApiKey + "&lat=" + Math.Round(lat) + "&lon=" + Math.Round(lon) + "&start=" + Timestamp + "&end=" + Timestamp);
var response = await http.GetAsync(url);
var result = await response.Content.ReadAsStringAsync();
var serializer = new DataContractJsonSerializer(typeof(RootObject));
var ms = new MemoryStream(Encoding.UTF8.GetBytes(result));
var uvdata = (RootObject)serializer.ReadObject(ms);
Agara.Program.WeatherApiCalls++;
Console.WriteLine(uvdata.lat + "\n" + uvdata.lon + "\n" + uvdata.date_iso.ToString() + "\n" + uvdata.date + "\n" + uvdata.value);
return uvdata;
}
}
结果看起来像这样
[{"lat":54,"lon":9,"date_iso":"2018-05-08T12:00:00Z","date":1525780800,"value":5.62}]
变量(例如 uvdata.lat)只包含零,尽管 API 信息应该存储在这些变量中。
该JSON不包含RootObject
,这是一个数组的RootObject
。所以:
var serializer = new DataContractJsonSerializer(typeof(RootObject[]))
// ...
var uvdata = (RootObject[])serializer.ReadObject(ms);
或者,使用Newtonsoft.Json:
var uvData = JsonConvert.DeserializeObject<RootObject[]>(result);
您也可以反序列化为一个List<RootObject>
而不是数组。
如果要保留前导零,请将这些属性反序列化为字符串,因为整数没有该概念,因此:
public class RootObject
{
public string lat { get; set; }
public string lon { get; set; }
public DateTime date_iso { get; set; }
public int date { get; set; }
public double value { get; set; }
}
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我来说两句