Как получить конкретные данные из строки json в C#?

У меня есть JSON строка, которая является ответом апи:Как получить конкретные данные из строки json в C#?

{ 
    "response": { 
    "version":"0.1", 
    "termsofService":"http://www.wunderground.com/weather/api/d/terms.html", 
    "features": { 
    "forecast10day": 1 
    } 
    } 
     , 
    "forecast":{ 
     "txt_forecast": { 
     "date":"5:51 AM PDT", 
     "forecastday": [ 
     { 
     "period":0, 
     "icon":"fog", 
     "icon_url":"http://icons.wxug.com/i/c/k/fog.gif", 
     "title":"Monday", 
     "fcttext":"Foggy early, becoming sunny this afternoon. High 71F. Winds NNW at 10 to 15 mph.", 
     "fcttext_metric":"Partly cloudy skies. High 22C. Winds NNW at 15 to 25 km/h.", 
     "pop":"0" 
     } 
     , 
     { 
     "period":1, 
     "icon":"nt_mostlycloudy", 
     "icon_url":"http://icons.wxug.com/i/c/k/nt_mostlycloudy.gif", 
     "title":"Monday Night", 
     "fcttext":"Partly cloudy early followed by cloudy skies overnight. Low 56F. Winds WNW at 10 to 15 mph.", 
     "fcttext_metric":"Partly cloudy skies this evening will become overcast overnight. Low 13C. Winds WNW at 10 to 15 km/h.", 
     "pop":"0" 
     } 
     , 
     { 
     "period":2, 
     "icon":"cloudy", 
     "icon_url":"http://icons.wxug.com/i/c/k/cloudy.gif", 
     "title":"Tuesday", 
     "fcttext":"Cloudy. Slight chance of an afternoon shower. High 67F. Winds NNW at 5 to 10 mph.", 
     "fcttext_metric":"Overcast. Slight chance of an afternoon shower. High around 20C. Winds NW at 10 to 15 km/h.", 
     "pop":"20" 
     } 
     , 
     { 
     "period":3, 
     "icon":"nt_cloudy", 
     "icon_url":"http://icons.wxug.com/i/c/k/nt_cloudy.gif", 
     "title":"Tuesday Night", 
     "fcttext":"Cloudy. Slight chance of a rain shower. Low 59F. Winds NW at 5 to 10 mph.", 
     "fcttext_metric":"Cloudy. Slight chance of a rain shower. Low around 15C. Winds NW at 10 to 15 km/h.", 
     "pop":"20" 
     } 
     , 
     { 
     "period":4, 
     "icon":"chancerain", 
     "icon_url":"http://icons.wxug.com/i/c/k/chancerain.gif", 
     "title":"Wednesday", 
     "fcttext":"Rain showers early with some sunshine later in the day. High near 65F. Winds W at 10 to 20 mph. Chance of rain 40%.", 
     "fcttext_metric":"Showers in the morning, then partly cloudy in the afternoon. High 19C. Winds W at 15 to 30 km/h. Chance of rain 40%.", 
     "pop":"40" 
     } 
     , 
     { 
     "period":5, 
     "icon":"nt_clear", 
     "icon_url":"http://icons.wxug.com/i/c/k/nt_clear.gif", 
     "title":"Wednesday Night", 
     "fcttext":"Mostly clear skies. Low 57F. Winds NW at 10 to 15 mph.", 
     "fcttext_metric":"Generally fair. Low 14C. Winds NW at 15 to 25 km/h.", 
     "pop":"10" 
     } 
     , 
     { 
     "period":6, 
     "icon":"partlycloudy", 
     "icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif", 
     "title":"Thursday", 
     "fcttext":"Some clouds in the morning will give way to mainly sunny skies for the afternoon. High 67F. Winds NW at 15 to 25 mph.", 
     "fcttext_metric":"Some clouds in the morning will give way to mainly sunny skies for the afternoon. High around 20C. Winds NW at 25 to 40 km/h.", 
     "pop":"10" 
     } 
     , 
     { 
     "period":7, 
     "icon":"nt_clear", 
     "icon_url":"http://icons.wxug.com/i/c/k/nt_clear.gif", 
     "title":"Thursday Night", 
     "fcttext":"Mostly clear. Low 57F. Winds NNW at 10 to 20 mph.", 
     "fcttext_metric":"Mostly clear. Low 14C. Winds NNW at 15 to 30 km/h.", 
     "pop":"0" 
     } 
     , 
     { 
     "period":8, 
     "icon":"clear", 
     "icon_url":"http://icons.wxug.com/i/c/k/clear.gif", 
     "title":"Friday", 
     "fcttext":"Mainly sunny. High 73F. Winds NNW at 10 to 20 mph.", 
     "fcttext_metric":"Abundant sunshine. High 23C. Winds NNW at 15 to 30 km/h.", 
     "pop":"0" 
     } 
     , 
     { 
     "period":9, 
     "icon":"nt_clear", 
     "icon_url":"http://icons.wxug.com/i/c/k/nt_clear.gif", 
     "title":"Friday Night", 
     "fcttext":"A mostly clear sky. Low 58F. Winds NNW at 10 to 15 mph.", 
     "fcttext_metric":"A mostly clear sky. Low 14C. Winds NNW at 10 to 15 km/h.", 
     "pop":"0" 
     } 
     , 
     { 
     "period":10, 
     "icon":"clear", 
     "icon_url":"http://icons.wxug.com/i/c/k/clear.gif", 
     "title":"Saturday", 
     "fcttext":"Mainly sunny. High 71F. NE winds shifting to NW at 10 to 15 mph.", 
     "fcttext_metric":"Sunny skies. High 22C. NE winds shifting to NW at 15 to 25 km/h.", 
     "pop":"0" 
     } 
     , 
     { 
     "period":11, 
     "icon":"nt_clear", 
     "icon_url":"http://icons.wxug.com/i/c/k/nt_clear.gif", 
     "title":"Saturday Night", 
     "fcttext":"Partly cloudy. Low 57F. Winds WNW at 10 to 15 mph.", 
     "fcttext_metric":"A few clouds overnight. Low 14C. Winds WNW at 10 to 15 km/h.", 
     "pop":"10" 
     } 
     , 
     { 
     "period":12, 
     "icon":"partlycloudy", 
     "icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif", 
     "title":"Sunday", 
     "fcttext":"Partly cloudy skies. High near 65F. Winds WNW at 10 to 20 mph.", 
     "fcttext_metric":"Some clouds in the morning will give way to mainly sunny skies for the afternoon. High 19C. Winds WNW at 15 to 30 km/h.", 
     "pop":"10" 
     } 
     , 
     { 
     "period":13, 
     "icon":"nt_clear", 
     "icon_url":"http://icons.wxug.com/i/c/k/nt_clear.gif", 
     "title":"Sunday Night", 
     "fcttext":"Clear to partly cloudy. Low around 55F. Winds NW at 10 to 20 mph.", 
     "fcttext_metric":"Clear to partly cloudy. Low 13C. Winds NW at 15 to 30 km/h.", 
     "pop":"10" 
     } 
     , 
     { 
     "period":14, 
     "icon":"partlycloudy", 
     "icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif", 
     "title":"Monday", 
     "fcttext":"Wind increasing. A few clouds from time to time. High 62F. Winds NW at 20 to 30 mph.", 
     "fcttext_metric":"Wind increasing. A few clouds from time to time. High 17C. Winds NW at 30 to 50 km/h.", 
     "pop":"10" 
     } 
     , 
     { 
     "period":15, 
     "icon":"nt_clear", 
     "icon_url":"http://icons.wxug.com/i/c/k/nt_clear.gif", 
     "title":"Monday Night", 
     "fcttext":"Partly cloudy. Low 52F. Winds NW at 15 to 25 mph.", 
     "fcttext_metric":"A few clouds overnight. Low 11C. Winds NW at 25 to 40 km/h.", 
     "pop":"10" 
     } 
     , 
     { 
     "period":16, 
     "icon":"partlycloudy", 
     "icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif", 
     "title":"Tuesday", 
     "fcttext":"Partly cloudy skies. High 63F. Winds NW at 15 to 25 mph.", 
     "fcttext_metric":"Some clouds in the morning will give way to mainly sunny skies for the afternoon. High 18C. Winds NW at 25 to 40 km/h.", 
     "pop":"0" 
     } 
     , 
     { 
     "period":17, 
     "icon":"nt_clear", 
     "icon_url":"http://icons.wxug.com/i/c/k/nt_clear.gif", 
     "title":"Tuesday Night", 
     "fcttext":"Mostly clear. Low 52F. Winds NNW at 10 to 20 mph.", 
     "fcttext_metric":"A mostly clear sky. Low 11C. Winds NNW at 15 to 30 km/h.", 
     "pop":"0" 
     } 
     , 
     { 
     "period":18, 
     "icon":"clear", 
     "icon_url":"http://icons.wxug.com/i/c/k/clear.gif", 
     "title":"Wednesday", 
     "fcttext":"Mainly sunny. High around 65F. Winds N at 10 to 20 mph.", 
     "fcttext_metric":"Mainly sunny. High 19C. Winds N at 15 to 30 km/h.", 
     "pop":"0" 
     } 
     , 
     { 
     "period":19, 
     "icon":"nt_clear", 
     "icon_url":"http://icons.wxug.com/i/c/k/nt_clear.gif", 
     "title":"Wednesday Night", 
     "fcttext":"Mainly clear early, then a few clouds later on. Low 52F. Winds N at 10 to 15 mph.", 
     "fcttext_metric":"Mainly clear early, then a few clouds later on. Low 11C. Winds N at 15 to 25 km/h.", 
     "pop":"0" 
     } 
     ] 
     }, 
     "simpleforecast": { 
     "forecastday": [ 
     {"date":{ 
    "epoch":"1445911200", 
    "pretty":"7:00 PM PDT on October 26, 2015", 
    "day":26, 
    "month":10, 
    "year":2015, 
    "yday":298, 
    "hour":19, 
    "min":"00", 
    "sec":0, 
    "isdst":"1", 
    "monthname":"October", 
    "monthname_short":"Oct", 
    "weekday_short":"Mon", 
    "weekday":"Monday", 
    "ampm":"PM", 
    "tz_short":"PDT", 
    "tz_long":"America/Los_Angeles" 
}, 
     "period":1, 
     "high": { 
     "fahrenheit":"71", 
     "celsius":"22" 
     }, 
     "low": { 
     "fahrenheit":"56", 
     "celsius":"13" 
     }, 
     "conditions":"Fog", 
     "icon":"fog", 
     "icon_url":"http://icons.wxug.com/i/c/k/fog.gif", 
     "skyicon":"", 
     "pop":0, 
     "qpf_allday": { 
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     "mm": 0 
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     "qpf_day": { 
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     "qpf_night": { 
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     "maxwind": { 
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     "kph": 24, 
     "dir": "NNW", 
     "degrees": 345 
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     "avewind": { 
     "mph": 11, 
     "kph": 18, 
     "dir": "NNW", 
     "degrees": 345 
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     "avehumidity": 76, 
     "maxhumidity": 0, 
     "minhumidity": 0 
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     , 
     {"date":{ 
    "epoch":"1445997600", 
    "pretty":"7:00 PM PDT on October 27, 2015", 
    "day":27, 
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    "year":2015, 
    "yday":299, 
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    "min":"00", 
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    "isdst":"1", 
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    "tz_long":"America/Los_Angeles" 
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     "period":2, 
     "high": { 
     "fahrenheit":"67", 
     "celsius":"19" 
     }, 
     "low": { 
     "fahrenheit":"59", 
     "celsius":"15" 
     }, 
     "conditions":"Overcast", 
     "icon":"cloudy", 
     "icon_url":"http://icons.wxug.com/i/c/k/cloudy.gif", 
     "skyicon":"", 
     "pop":20, 
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     "degrees": 329 
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     "avewind": { 
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     "kph": 14, 
     "dir": "NNW", 
     "degrees": 329 
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     "avehumidity": 72, 
     "maxhumidity": 0, 
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     , 
     {"date":{ 
    "epoch":"1446084000", 
    "pretty":"7:00 PM PDT on October 28, 2015", 
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    "yday":300, 
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    "tz_long":"America/Los_Angeles" 
}, 
     "period":3, 
     "high": { 
     "fahrenheit":"65", 
     "celsius":"18" 
     }, 
     "low": { 
     "fahrenheit":"57", 
     "celsius":"14" 
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     "conditions":"Chance of Rain", 
     "icon":"chancerain", 
     "icon_url":"http://icons.wxug.com/i/c/k/chancerain.gif", 
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     "degrees": 269 
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     "kph": 21, 
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     "degrees": 269 
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     {"date":{ 
    "epoch":"1446170400", 
    "pretty":"7:00 PM PDT on October 29, 2015", 
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    "tz_long":"America/Los_Angeles" 
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     "high": { 
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     "conditions":"Partly Cloudy", 
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     "degrees": 319 
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     "kph": 27, 
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     "degrees": 319 
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     "avehumidity": 78, 
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     , 
     {"date":{ 
    "epoch":"1446256800", 
    "pretty":"7:00 PM PDT on October 30, 2015", 
    "day":30, 
    "month":10, 
    "year":2015, 
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    "tz_long":"America/Los_Angeles" 
}, 
     "period":5, 
     "high": { 
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     "low": { 
     "fahrenheit":"58", 
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     "conditions":"Clear", 
     "icon":"clear", 
     "icon_url":"http://icons.wxug.com/i/c/k/clear.gif", 
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     "degrees": 347 
     }, 
     "avewind": { 
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     "degrees": 347 
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     "avehumidity": 50, 
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     , 
     {"date":{ 
    "epoch":"1446343200", 
    "pretty":"7:00 PM PDT on October 31, 2015", 
    "day":31, 
    "month":10, 
    "year":2015, 
    "yday":303, 
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    "min":"00", 
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    "tz_long":"America/Los_Angeles" 
}, 
     "period":6, 
     "high": { 
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     "low": { 
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     "conditions":"Clear", 
     "icon":"clear", 
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     "skyicon":"", 
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     , 
     {"date":{ 
    "epoch":"1446433200", 
    "pretty":"7:00 PM PST on November 01, 2015", 
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     , 
     {"date":{ 
    "epoch":"1446519600", 
    "pretty":"7:00 PM PST on November 02, 2015", 
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    "tz_long":"America/Los_Angeles" 
}, 
     "period":8, 
     "high": { 
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     , 
     {"date":{ 
    "epoch":"1446606000", 
    "pretty":"7:00 PM PST on November 03, 2015", 
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    "hour":19, 
    "min":"00", 
    "sec":0, 
    "isdst":"0", 
    "monthname":"November", 
    "monthname_short":"Nov", 
    "weekday_short":"Tue", 
    "weekday":"Tuesday", 
    "ampm":"PM", 
    "tz_short":"PST", 
    "tz_long":"America/Los_Angeles" 
}, 
     "period":9, 
     "high": { 
     "fahrenheit":"63", 
     "celsius":"17" 
     }, 
     "low": { 
     "fahrenheit":"52", 
     "celsius":"11" 
     }, 
     "conditions":"Partly Cloudy", 
     "icon":"partlycloudy", 
     "icon_url":"http://icons.wxug.com/i/c/k/partlycloudy.gif", 
     "skyicon":"", 
     "pop":0, 
     "qpf_allday": { 
     "in": 0.00, 
     "mm": 0 
     }, 
     "qpf_day": { 
     "in": 0.00, 
     "mm": 0 
     }, 
     "qpf_night": { 
     "in": 0.00, 
     "mm": 0 
     }, 
     "snow_allday": { 
     "in": 0.0, 
     "cm": 0.0 
     }, 
     "snow_day": { 
     "in": 0.0, 
     "cm": 0.0 
     }, 
     "snow_night": { 
     "in": 0.0, 
     "cm": 0.0 
     }, 
     "maxwind": { 
     "mph": 25, 
     "kph": 40, 
     "dir": "NW", 
     "degrees": 326 
     }, 
     "avewind": { 
     "mph": 19, 
     "kph": 31, 
     "dir": "NW", 
     "degrees": 326 
     }, 
     "avehumidity": 58, 
     "maxhumidity": 0, 
     "minhumidity": 0 
     } 
     , 
     {"date":{ 
    "epoch":"1446692400", 
    "pretty":"7:00 PM PST on November 04, 2015", 
    "day":4, 
    "month":11, 
    "year":2015, 
    "yday":307, 
    "hour":19, 
    "min":"00", 
    "sec":0, 
    "isdst":"0", 
    "monthname":"November", 
    "monthname_short":"Nov", 
    "weekday_short":"Wed", 
    "weekday":"Wednesday", 
    "ampm":"PM", 
    "tz_short":"PST", 
    "tz_long":"America/Los_Angeles" 
}, 
     "period":10, 
     "high": { 
     "fahrenheit":"65", 
     "celsius":"18" 
     }, 
     "low": { 
     "fahrenheit":"52", 
     "celsius":"11" 
     }, 
     "conditions":"Clear", 
     "icon":"clear", 
     "icon_url":"http://icons.wxug.com/i/c/k/clear.gif", 
     "skyicon":"", 
     "pop":0, 
     "qpf_allday": { 
     "in": 0.00, 
     "mm": 0 
     }, 
     "qpf_day": { 
     "in": 0.00, 
     "mm": 0 
     }, 
     "qpf_night": { 
     "in": 0.00, 
     "mm": 0 
     }, 
     "snow_allday": { 
     "in": 0.0, 
     "cm": 0.0 
     }, 
     "snow_day": { 
     "in": 0.0, 
     "cm": 0.0 
     }, 
     "snow_night": { 
     "in": 0.0, 
     "cm": 0.0 
     }, 
     "maxwind": { 
     "mph": 20, 
     "kph": 32, 
     "dir": "N", 
     "degrees": 357 
     }, 
     "avewind": { 
     "mph": 13, 
     "kph": 21, 
     "dir": "N", 
     "degrees": 357 
     }, 
     "avehumidity": 45, 
     "maxhumidity": 0, 
     "minhumidity": 0 
     } 
     ] 
     } 
    } 
}

Мне нужно, чтобы получить все элементы, которые находятся под forecastday массива.

Я пытался получить необходимый ответ таким образом:

Я создал некоторые классы модели

#region За последующие 10 дней brodcast

public class forecast 
{ 
    public simpleforecast simpleforecast { get; set; } 
} 
public class simpleforecast 
{ 
    public List<item> forecastday { get; set; } 
} 

public class high 
{ 
    public decimal fahrenheit { get; set; } 
    public decimal celsius { get; set; } 
} 
public class low 
{ 
    public decimal fahrenheit { get; set; } 
    public decimal celsius { get; set; } 
} 

public class item 
{ 
    public high high { get; set; } 
    public low low { get; set; } 
} 
#endregion

и затем попытался использовать десериализатор следующим образом:

var test1 = new JsonSerializer().Deserialize(new StringReader(responseData), new forecast().GetType()) as forecast;

но не повезло. Пожалуйста, дайте мне знать на правильном пути? или я должен изменить свой подход?

Любое предложение или трюк или пример кода, статья может помочь мне.

Заранее спасибо.

источник

2015-10-26 R K Sharma

В чем проблема? Любые исключения или просто null? –

Я получаю null в test1 –

Это обычно означает, что вы не десериализуете ответ в правильной структуре –

Это должно быть вашей модели:

public class Features 
{ 
    public int forecast10day { get; set; } 
} 

public class Response 
{ 
    public string version { get; set; } 
    public string termsofService { get; set; } 
    public Features features { get; set; } 
} 

public class Forecastday 
{ 
    public int period { get; set; } 
    public string icon { get; set; } 
    public string icon_url { get; set; } 
    public string title { get; set; } 
    public string fcttext { get; set; } 
    public string fcttext_metric { get; set; } 
    public string pop { get; set; } 
} 

public class TxtForecast 
{ 
    public string date { get; set; } 
    public List<Forecastday> forecastday { get; set; } 
} 

public class Date 
{ 
    public string epoch { get; set; } 
    public string pretty { get; set; } 
    public int day { get; set; } 
    public int month { get; set; } 
    public int year { get; set; } 
    public int yday { get; set; } 
    public int hour { get; set; } 
    public string min { get; set; } 
    public int sec { get; set; } 
    public string isdst { get; set; } 
    public string monthname { get; set; } 
    public string monthname_short { get; set; } 
    public string weekday_short { get; set; } 
    public string weekday { get; set; } 
    public string ampm { get; set; } 
    public string tz_short { get; set; } 
    public string tz_long { get; set; } 
} 

public class High 
{ 
    public string fahrenheit { get; set; } 
    public string celsius { get; set; } 
} 

public class Low 
{ 
    public string fahrenheit { get; set; } 
    public string celsius { get; set; } 
} 

public class QpfAllday 
{ 
    public double @in { get; set; } 
    public int mm { get; set; } 
} 

public class QpfDay 
{ 
    public double @in { get; set; } 
    public int mm { get; set; } 
} 

public class QpfNight 
{ 
    public double @in { get; set; } 
    public int mm { get; set; } 
} 

public class SnowAllday 
{ 
    public double @in { get; set; } 
    public double cm { get; set; } 
} 

public class SnowDay 
{ 
    public double @in { get; set; } 
    public double cm { get; set; } 
} 

public class SnowNight 
{ 
    public double @in { get; set; } 
    public double cm { get; set; } 
} 

public class Maxwind 
{ 
    public int mph { get; set; } 
    public int kph { get; set; } 
    public string dir { get; set; } 
    public int degrees { get; set; } 
} 

public class Avewind 
{ 
    public int mph { get; set; } 
    public int kph { get; set; } 
    public string dir { get; set; } 
    public int degrees { get; set; } 
} 

public class Forecastday2 
{ 
    public Date date { get; set; } 
    public int period { get; set; } 
    public High high { get; set; } 
    public Low low { get; set; } 
    public string conditions { get; set; } 
    public string icon { get; set; } 
    public string icon_url { get; set; } 
    public string skyicon { get; set; } 
    public int pop { get; set; } 
    public QpfAllday qpf_allday { get; set; } 
    public QpfDay qpf_day { get; set; } 
    public QpfNight qpf_night { get; set; } 
    public SnowAllday snow_allday { get; set; } 
    public SnowDay snow_day { get; set; } 
    public SnowNight snow_night { get; set; } 
    public Maxwind maxwind { get; set; } 
    public Avewind avewind { get; set; } 
    public int avehumidity { get; set; } 
    public int maxhumidity { get; set; } 
    public int minhumidity { get; set; } 
} 

public class Simpleforecast 
{ 
    public List<Forecastday2> forecastday { get; set; } 
} 

public class Forecast 
{ 
    public TxtForecast txt_forecast { get; set; } 
    public Simpleforecast simpleforecast { get; set; } 
} 

public class MainModel 
{ 
    public Response response { get; set; } 
    public Forecast forecast { get; set; } 
}

Затем вы можете сделать следующее:

var test1 = new JsonSerializer().Deserialize(new StringReader(responseData), new forecast().GetType()) as forecast;

источник

2015-10-26 14:17:44

Я получаю ошибку времени компиляции некоторого недействительного аргумента :( –

Пожалуйста, напишите сообщение об ошибке –

Лучший перегруженный метод mach для 'Newtonsoft. Json.JsonSerializer.Deserialize (Newtonsoft.Json.JsonReader) 'имеет некоторые недопустимые аргументы –

var dict = new JavaScriptSerializer().Deserialize<Dictionary<string,object>>(responseData); 
var forecastdayvar = ["forecast"]["forecastday"];

Это поместит ваш JSON в словарь, и теперь вы можете получить доступ к его элементам. Похоже, как PHP это делает с массивом. Как вы можете видеть в: https://msdn.microsoft.com/en-us/library/xfhwa508(v=vs.110).aspx

Возможно, вы захотите поставить точку останова после десериализации и искать ключи и значения внутри.

источник

2015-10-26 14:19:19

Это всего лишь код, вы хотите объяснить свой код? –

вы делаете некоторую индексацию здесь var forecastdayvar = ["прогноз"] ["forecastday"]; но он дает мне ошибку времени компиляции –

добавил некоторые объяснения в моем ответе –

Как получить конкретные данные из строки json в C#?

ответ

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