C＃でXML apiデータから2番目の名前を取得するには

Question

私は高値と最低値をthis apiから取得しようとしていますが、高値を得ることはできますが、それは "fahrenheit"という名前で2番目に出現したアイテムですが、Highを得るために使ったのと同じ方法でこれをどうやって行えますか？あなたはXMLレスポンスを使用してソリューションをしたいので

if (xmlForecast.Name == "fahrenheit" && i == 0) 
{ 
    i++; 
    xmlHigh = xmlForecast.ReadString(); 
} 

Answer 1

、ここにある：

まず、あなたはXMLレスポンスを代表するクラスを作成する必要があります。

[XmlRoot("response")] 
public class Response 
{ 
    [XmlElement("version")] 
    public string Version { get; set; } 
    [XmlElement("termsofService")] 
    public string TermsOfService { get; set; } 
    [XmlElement("features")] 
    public Features Features { get; set; } 
    [XmlElement("forecast")] 
    public Forecast Forecast { get; set; } 
} 

public class Features 
{ 
    [XmlElement("forecast")] 
    public int Forecast { get; set; } 
} 

public class Forecast 
{ 
    [XmlElement("txt_forecast")] 
    public TxtForecast TxtForecast { get; set; } 
    [XmlElement("simpleforecast")] 
    public SimpleForecast SimpleForecast { get; set; } 
} 

public class TxtForecast 
{ 
    [XmlElement("date")] 
    public string Date { get; set; } 
    [XmlArray("forecastdays")] 
    [XmlArrayItem("forecastday")] 
    public List<ForecastDay> ForecastDays { get; set; } 
} 

public class ForecastDay 
{ 
    [XmlElement("period")] 
    public int Period { get; set; } 
    [XmlElement("icon")] 
    public string Icon { get; set; } 
    [XmlElement("icon_url")] 
    public string IconUrl { get; set; } 
    [XmlElement("title")] 
    public string Title { get; set; } 
    [XmlElement("fcttext")] 
    public string FctText { get; set; } 
    [XmlElement("fcttext_metric")] 
    public string FctTextMetric { get; set; } 
    [XmlElement("pop")] 
    public string Pop { get; set; } 
} 


public class SimpleForecast 
{ 
    [XmlArray("forecastdays")] 
    [XmlArrayItem("forecastday")] 
    public List<ForecastDay2> ForecastDays { get; set; } 
} 

public class ForecastDay2 
{ 
    [XmlElement("date")] 
    public Date Date { get; set; } 
    [XmlElement("period")] 
    public int Period { get; set; } 
    [XmlElement("high")] 
    public High High { get; set; } 
    [XmlElement("low")] 
    public Low Low { get; set; } 
    [XmlElement("conditions")] 
    public string Conditions { get; set; } 
    [XmlElement("icon")] 
    public string Icon { get; set; } 
    [XmlElement("icon_url")] 
    public string IconUrl { get; set; } 
    [XmlElement("skyicon")] 
    public string SkyIcon { get; set; } 
    [XmlElement("pop")] 
    public int Pop { get; set; } 
    [XmlElement("qpf_allday")] 
    public QpfAllday QpfAllDay { get; set; } 
    [XmlElement("qpf_day")] 
    public QpfDay QpfDay { get; set; } 
    [XmlElement("qpf_night")] 
    public QpfNight QpfNight { get; set; } 
    [XmlElement("snow_allday")] 
    public SnowAllday SnowAllday { get; set; } 
    [XmlElement("snow_day")] 
    public SnowDay SnowDay { get; set; } 
    [XmlElement("snow_night")] 
    public SnowNight SnowNight { get; set; } 
    [XmlElement("maxwind")] 
    public MaxWind MaxWind { get; set; } 
    [XmlElement("avewind")] 
    public AveWind AveWind { get; set; } 
    [XmlElement("avehumidity")] 
    public int AveHumidity { get; set; } 
    [XmlElement("maxhumidity")] 
    public int MaxHumidity { get; set; } 
    [XmlElement("minhumidity")] 
    public int MinHumidity { get; set; } 
} 

public class Date 
{ 
    [XmlElement("epoch")] 
    public string Epoch { get; set; } 
    [XmlElement("pretty")] 
    public string Pretty { get; set; } 
    [XmlElement("day")] 
    public int Day { get; set; } 
    [XmlElement("month")] 
    public int Month { get; set; } 
    [XmlElement("year")] 
    public int Year { get; set; } 
    [XmlElement("yday")] 
    public int Yesterday { get; set; } 
    [XmlElement("hour")] 
    public int Hour { get; set; } 
    [XmlElement("min")] 
    public string Min { get; set; } 
    [XmlElement("sec")] 
    public int Sec { get; set; } 
    [XmlElement("isdst")] 
    public string Isdst { get; set; } 
    [XmlElement("monthname")] 
    public string MonthName { get; set; } 
    [XmlElement("monthname_short")] 
    public string MonthNameShort { get; set; } 
    [XmlElement("weekday_short")] 
    public string WeekdayShort { get; set; } 
    [XmlElement("weekday")] 
    public string Weekday { get; set; } 
    [XmlElement("ampm")] 
    public string AmPM { get; set; } 
    [XmlElement("tz_short")] 
    public string TzShort { get; set; } 
    [XmlElement("tz_long")] 
    public string TzLong { get; set; } 
} 

public class High 
{ 
    [XmlElement("fahrenheit")] 
    public string Fahrenheit { get; set; } 
    [XmlElement("celsius")] 
    public string Celsius { get; set; } 
} 

public class Low 
{ 
    [XmlElement("fahrenheit")] 
    public string Fahrenheit { get; set; } 
    [XmlElement("celsius")] 
    public string Celsius { get; set; } 
} 

public class QpfAllday 
{ 
    [XmlElement("@in")] 
    public double Inches { get; set; } 
    [XmlElement("mm")] 
    public int Milimeters { get; set; } 
} 

public class QpfDay 
{ 
    [XmlElement("@in")] 
    public double Inches { get; set; } 
    [XmlElement("mm")] 
    public int Milimeters { get; set; } 
} 

public class QpfNight 
{ 
    [XmlElement("@in")] 
    public double Inches { get; set; } 
    [XmlElement("mm")] 
    public int Milimeters { get; set; } 
} 

public class SnowAllday 
{ 
    [XmlElement("@in")] 
    public double Inches { get; set; } 
    [XmlElement("cm")] 
    public double Centimeters { get; set; } 
} 

public class SnowDay 
{ 
    [XmlElement("@in")] 
    public double Inches { get; set; } 
    [XmlElement("cm")] 
    public double Centimeters { get; set; } 
} 

public class SnowNight 
{ 
    [XmlElement("@in")] 
    public double Inches { get; set; } 
    [XmlElement("cm")] 
    public double Centimeters { get; set; } 
} 

public class MaxWind 
{ 
    [XmlElement("mph")] 
    public int Mph { get; set; } 
    [XmlElement("kph")] 
    public int Kph { get; set; } 
    [XmlElement("dir")] 
    public string Direction { get; set; } 
    [XmlElement("degrees")] 
    public int Degrees { get; set; } 
} 

public class AveWind 
{ 
    [XmlElement("mph")] 
    public int Mph { get; set; } 
    [XmlElement("kph")] 
    public int Kph { get; set; } 
    [XmlElement("dir")] 
    public string Direction { get; set; } 
    [XmlElement("degrees")] 
    public int Degrees { get; set; } 
} 

は第二に、あなたは私がXmlSerializerを使用していますが、あなたも新しいですDataContractSerializerを使用することができますResponse

using (HttpClient client = new HttpClient()) 
{ 
    using (var stream = await client.GetStreamAsync("http://api.wunderground.com/api/ea4bb7e7839782da/forecast/q/CA/San_Francisco.xml")) 
    { 
     var serializer = new XmlSerializer(typeof(Response)); 
     var response = (Response)serializer.Deserialize(stream); 

     var simpleForecast = response.Forecast.SimpleForecast; 
     var forecastDays = simpleForecast.ForecastDays; 
     var latestForecastDay = forecastDays.Last(); 
     var latestHighFahrenheit = latestForecastDay.High.Fahrenheit; 
     var latestLowFahrenheit = latestForecastDay.Low.Fahrenheit; 
    } 
} 

にXMLをデシリアライズする必要があります。 DataContractSerializerを使用する場合は、XmlElementの属性をDataContractとDataMemberに置き換える必要があることにご注意ください。

注：ここでは、不要な手順や変数の宣言を意図的に追加しているため、ここで何が起こっているのかを明確に確認できます。