圣诞快乐!我正在尝试从 Wunderground 天气 API 解析一些 JSON，并且在尝试为变量赋值时遇到了问题。 Here是 JSON 的链接。只需知道我提供的类结构是一个集团，以便容纳多个 JSON 返回文件结构。我将给出类结构，然后是来自 main 的调用，最后是带有错误标记的实际方法。我在 Xamarin 工作，以前是 MonoDevelop。感谢您提出任何建议!
错误如下: 已抛出 Newtonsoft.Json.JsonReaderException “无法将字符串转换为整数:5.0 路径 'current_observation.wind_gust_mph'，第 60 行，第 24 位。
public class Wunder
{
//constructor
public Wunder ()
{
}
//JSON classes
public class HistoryResponseContainer
{
public ResponseInfo response { get; set; }
public HistoryInfo history { get; set; }
public Location location { get; set; }
public CurrentObservation current_observation { get; set; }
}
public class ResponseInfo
{
public string version { get; set; }
public string termsofService { get; set; }
public Dictionary<string, int> features { get; set; }
}
public class HistoryInfo
{
public WUDate date { get; set; }
public WUDate utcdate { get; set; }
public Observation[] observations { get; set; }
public Dailysummary[] dailysummary { get; set; }
}
public class WUDate
{
public string pretty { get; set; }
public string year { get; set; }
public string mon { get; set; }
public string mday { get; set; }
public string hour { get; set; }
public string min { get; set; }
public string tzname { get; set; }
public DateTime Value
{
get
{
int year = int.Parse(this.year);
int month = int.Parse(this.mon);
int day = int.Parse(this.mday);
int hour = int.Parse(this.hour);
int minute = int.Parse(this.min);
var kind = this.tzname == "UTC"
? DateTimeKind.Utc
: DateTimeKind.Unspecified;
return new DateTime(year, month, day, hour, minute, 0, kind);
}
}
}
public class Observation
{
public WUDate date { get; set; }
public WUDate utcdate { get; set; }
public string tempm { get; set; }
public string tempi { get; set; }
public string dewptm { get; set; }
public string dewpti { get; set; }
public string hum { get; set; }
public string wspdm { get; set; }
public string wspdi { get; set; }
public string wgustm { get; set; }
public string wgusti { get; set; }
public string wdird { get; set; }
public string wdire { get; set; }
public string vism { get; set; }
public string visi { get; set; }
public string pressurem { get; set; }
public string pressurei { get; set; }
public string windchillm { get; set; }
public string windchilli { get; set; }
public string heatindexm { get; set; }
public string heatindexi { get; set; }
public string precipm { get; set; }
public string precipi { get; set; }
public string conds { get; set; }
public string icon { get; set; }
public string fog { get; set; }
public string rain { get; set; }
public string snow { get; set; }
public string hail { get; set; }
public string thunder { get; set; }
public string tornado { get; set; }
public string metar { get; set; }
}
public class Dailysummary
{
public WUDate date { get; set; }
public string fog { get; set; }
public string rain { get; set; }
public string snow { get; set; }
public string snowfallm { get; set; }
public string snowfalli { get; set; }
public string monthtodatesnowfallm { get; set; }
public string monthtodatesnowfalli { get; set; }
public string since1julsnowfallm { get; set; }
public string since1julsnowfalli { get; set; }
public string snowdepthm { get; set; }
public string snowdepthi { get; set; }
public string hail { get; set; }
public string thunder { get; set; }
public string tornado { get; set; }
public string meantempm { get; set; }
public string meantempi { get; set; }
public string meandewptm { get; set; }
public string meandewpti { get; set; }
public string meanpressurem { get; set; }
public string meanpressurei { get; set; }
public string meanwindspdm { get; set; }
public string meanwindspdi { get; set; }
public string meanwdire { get; set; }
public string meanwdird { get; set; }
public string meanvism { get; set; }
public string meanvisi { get; set; }
public string humidity { get; set; }
public string maxtempm { get; set; }
public string maxtempi { get; set; }
public string mintempm { get; set; }
public string mintempi { get; set; }
public string maxhumidity { get; set; }
public string minhumidity { get; set; }
public string maxdewptm { get; set; }
public string maxdewpti { get; set; }
public string mindewptm { get; set; }
public string mindewpti { get; set; }
public string maxpressurem { get; set; }
public string maxpressurei { get; set; }
public string minpressurem { get; set; }
public string minpressurei { get; set; }
public string maxwspdm { get; set; }
public string maxwspdi { get; set; }
public string minwspdm { get; set; }
public string minwspdi { get; set; }
public string maxvism { get; set; }
public string maxvisi { get; set; }
public string minvism { get; set; }
public string minvisi { get; set; }
public string gdegreedays { get; set; }
public string heatingdegreedays { get; set; }
public string coolingdegreedays { get; set; }
public string precipm { get; set; }
public string precipi { get; set; }
public string precipsource { get; set; }
public string heatingdegreedaysnormal { get; set; }
public string monthtodateheatingdegreedays { get; set; }
public string monthtodateheatingdegreedaysnormal { get; set; }
public string since1sepheatingdegreedays { get; set; }
public string since1sepheatingdegreedaysnormal { get; set; }
public string since1julheatingdegreedays { get; set; }
public string since1julheatingdegreedaysnormal { get; set; }
public string coolingdegreedaysnormal { get; set; }
public string monthtodatecoolingdegreedays { get; set; }
public string monthtodatecoolingdegreedaysnormal { get; set; }
public string since1sepcoolingdegreedays { get; set; }
public string since1sepcoolingdegreedaysnormal { get; set; }
public string since1jancoolingdegreedays { get; set; }
public string since1jancoolingdegreedaysnormal { get; set; }
}
public class Station
{
public string city { get; set; }
public string state { get; set; }
public string country { get; set; }
public string icao { get; set; }
public string lat { get; set; }
public string lon { get; set; }
}
public class Airport
{
public List<Station> station { get; set; }
}
public class Station2
{
public string neighborhood { get; set; }
public string city { get; set; }
public string state { get; set; }
public string country { get; set; }
public string id { get; set; }
public double lat { get; set; }
public double lon { get; set; }
public int distance_km { get; set; }
public int distance_mi { get; set; }
}
public class Pws
{
public List<Station2> station { get; set; }
}
public class NearbyWeatherStations
{
public Airport airport { get; set; }
public Pws pws { get; set; }
}
public class Location
{
public string type { get; set; }
public string country { get; set; }
public string country_iso3166 { get; set; }
public string country_name { get; set; }
public string state { get; set; }
public string city { get; set; }
public string tz_short { get; set; }
public string tz_long { get; set; }
public string lat { get; set; }
public string lon { get; set; }
public string zip { get; set; }
public string magic { get; set; }
public string wmo { get; set; }
public string l { get; set; }
public string requesturl { get; set; }
public string wuiurl { get; set; }
public NearbyWeatherStations nearby_weather_stations { get; set; }
}
public class CurrentObservation
{
public Image image { get; set; }
public DisplayLocation display_location { get; set; }
public ObservationLocation observation_location { get; set; }
public Estimated estimated { get; set; }
public string station_id { get; set; }
public string observation_time { get; set; }
public string observation_time_rfc822 { get; set; }
public string observation_epoch { get; set; }
public string local_time_rfc822 { get; set; }
public string local_epoch { get; set; }
public string local_tz_short { get; set; }
public string local_tz_long { get; set; }
public string local_tz_offset { get; set; }
public string weather { get; set; }
public string temperature_string { get; set; }
public double temp_f { get; set; }
public double temp_c { get; set; }
public string relative_humidity { get; set; }
public string wind_string { get; set; }
public string wind_dir { get; set; }
public int wind_degrees { get; set; }
public double wind_mph { get; set; }
public int wind_gust_mph { get; set; }
public int wind_kph { get; set; }
public int wind_gust_kph { get; set; }
public string pressure_mb { get; set; }
public string pressure_in { get; set; }
public string pressure_trend { get; set; }
public string dewpoint_string { get; set; }
public int dewpoint_f { get; set; }
public int dewpoint_c { get; set; }
public string heat_index_string { get; set; }
public string heat_index_f { get; set; }
public string heat_index_c { get; set; }
public string windchill_string { get; set; }
public string windchill_f { get; set; }
public string windchill_c { get; set; }
public string feelslike_string { get; set; }
public string feelslike_f { get; set; }
public string feelslike_c { get; set; }
public string visibility_mi { get; set; }
public string visibility_km { get; set; }
public string solarradiation { get; set; }
public string UV { get; set; }
public string precip_1hr_string { get; set; }
public string precip_1hr_in { get; set; }
public string precip_1hr_metric { get; set; }
public string precip_today_string { get; set; }
public string precip_today_in { get; set; }
public string precip_today_metric { get; set; }
public string icon { get; set; }
public string icon_url { get; set; }
public string forecast_url { get; set; }
public string history_url { get; set; }
public string ob_url { get; set; }
}
public class ObservationLocation
{
public string full { get; set; }
public string city { get; set; }
public string state { get; set; }
public string country { get; set; }
public string country_iso3166 { get; set; }
public string latitude { get; set; }
public string longitude { get; set; }
public string elevation { get; set; }
}
public class Image
{
public string url { get; set; }
public string title { get; set; }
public string link { get; set; }
}
public class DisplayLocation
{
public string full { get; set; }
public string city { get; set; }
public string state { get; set; }
public string state_name { get; set; }
public string country { get; set; }
public string country_iso3166 { get; set; }
public string zip { get; set; }
public string magic { get; set; }
public string wmo { get; set; }
public string latitude { get; set; }
public string longitude { get; set; }
public string elevation { get; set; }
}
public class Estimated
{
}
这是来自 main 的调用。
class MainClass
{
public static void Main (string[] args)
{
Wunder data = new Wunder ();
string StationID = "KCOBOULD67";
string CurrentConditions = data.GetCurrentConditions (StationID);
Console.WriteLine (CurrentConditions);
}
}
最后，这是被调用的方法。我拿出了我的 Wunderground key 。如果您想要返回 JSON 的示例，请查看顶部的链接。
public String GetCurrentConditions(string StationID){
String url = @"http://api.wunderground.com/api/" + wundergroundkey + "/conditions/q/pws:" + StationID + ".json";
Uri uri = new Uri(url);
WebRequest webRequest = WebRequest.Create(uri);
WebResponse response = webRequest.GetResponse();
StreamReader streamReader = new StreamReader(response.GetResponseStream());
String responseData = streamReader.ReadToEnd();
var container = JsonConvert.DeserializeObject<HistoryResponseContainer> (responseData);
String stationid = container.current_observation.station_id;
String station_lat = container.current_observation.observation_location.latitude;
String station_lon = container.current_observation.observation_location.longitude;
String station_data = stationid + station_lat + station_lon;
return (station_data);
} //End GetCurrentConditions
同样，错误信息如下: 已抛出 Newtonsoft.Json.JsonReaderException “无法将字符串转换为整数:5.0 路径 'current_observation.wind_gust_mph'，第 60 行，第 24 位。
最佳答案
您向我们提供了指向以下 JSON 的链接:
http://api.wunderground.com/api/21fd5aec70326254/conditions/q/CA/San_Francisco.json
如您所见，属性 wind_gust_mph 为 0(没有引号，因此为整数)。这个 JSON 也很好用。但是在您的代码中，您使用以下 JSON:
http://api.wunderground.com/api/21fd5aec70326254/conditions/q/pws:KCOBOULD67.json
属性 wind_gust_mph 是“4.0”(带引号，所以是一个字符串)。而且您不能将字符串属性解析为整数。 wind_kph 和 wind_gust_kph 的属性也是错误的，这应该是字符串或 double :
public string wind_gust_mph { get; set; }
public double wind_kph { get; set; }
public string wind_gust_kph { get; set; }
希望这对您有所帮助，祝您圣诞快乐。
关于c# - 使用 NewtonSoft 解析 JSON 时出错，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20774555/