C# C# Streams and Data Processing Serialization Deserializing with Json.NET

Klas Haraldson
Klas Haraldson
10,095 Points

Deserializing with Json.NET, 4:th challenge task code error

I cannot solve this chalIenge task. I get an error message like this: Program.cs(24,17): error CS0103: The name `weatherForecasts' does not exist in the current context Compilation failed: 1 error(s), 0 warnings Thanks for help!

"""C#
public static List<WeatherForecast> DeserializeWeather(string fileName){

        List<WeatherForecast> weatherForcasts = new List<WeatherForecast>();

        using (StreamReader reader = new StreamReader(fileName))
            using (var jsonReader = new JsonTextReader(reader))

        {
            var serializer = new JsonSerializer();
            weatherForecasts = serializer.Deserialize<List<WeatherForecast>>(jsonReader);
        }
        return weatherForcasts;
    }

"""

Program.cs
using System;
using System.IO;
using System.Collections.Generic;
using Newtonsoft.Json;

namespace Treehouse.CodeChallenges
{
    public class Program
    {

        public static void Main(string[] arg)
        {
        }

        //Program.cs(24,17): error CS0103: The name `weatherForecasts' does not exist in the current context
            //Compilation failed: 1 error(s), 0 warnings

        public static List<WeatherForecast> DeserializeWeather(string fileName){

            List<WeatherForecast> weatherForcasts = new List<WeatherForecast>();

            using (StreamReader reader = new StreamReader(fileName))
                using (var jsonReader = new JsonTextReader(reader))

            {
                var serializer = new JsonSerializer();
                weatherForecasts = serializer.Deserialize<List<WeatherForecast>>(jsonReader);
            }
            return weatherForcasts;
        }

        public static WeatherForecast ParseWeatherForecast(string[] values)
        {
            var weatherForecast = new WeatherForecast();
            weatherForecast.WeatherStationId = values[0];
            DateTime timeOfDay;
            if (DateTime.TryParse(values[1], out timeOfDay))
            {
                weatherForecast.TimeOfDay = timeOfDay;
            }
            Condition condition;
            if (Enum.TryParse(values[2], out condition))
            {
                weatherForecast.Condition = condition;
            }
            int temperature;
            if (int.TryParse(values[3], out temperature))
            {
                weatherForecast.Temperature = temperature;
            }
            double precipitation;
            if (double.TryParse(values[4], out precipitation))
            {
                weatherForecast.PrecipitationChance = precipitation;
            }
            if (double.TryParse(values[5], out precipitation))
            {
                weatherForecast.PrecipitationAmount = precipitation;
            }
            return weatherForecast;
        }
    }
}
WeatherForecast.cs
using System;

/* Sample JSON 

[
  {
    "weather_station_id": "HGKL8Q",
    "time_of_day": "06/11/2016 0:00",
    "condition": "Rain",
    "temperature": 53,
    "precipitation_chance": 0.3,
    "precipitation_amount": 0.03
  },
  {
    "weather_station_id": "HGKL8Q",
    "time_of_day": "06/11/2016 6:00",
    "condition": "Cloudy",
    "temperature": 56,
    "precipitation_chance": 0.08,
    "precipitation_amount": 0.01
  },
  {
    "weather_station_id": "HGKL8Q",
    "time_of_day": "06/11/2016 12:00",
    "condition": "PartlyCloudy",
    "temperature": 70,
    "precipitation_chance": 0,
    "precipitation_amount": 0
  },
  {
    "weather_station_id": "HGKL8Q",
    "time_of_day": "06/11/2016 18:00",
    "condition": "Sunny",
    "temperature": 76,
    "precipitation_chance": 0,
    "precipitation_amount": 0
  },
  {
    "weather_station_id": "HGKL8Q",
    "time_of_day": "06/11/2016 19:00",
    "condition": "Clear",
    "temperature": 74,
    "precipitation_chance": 0,
    "precipitation_amount": 0
  }
]
*/

namespace Treehouse.CodeChallenges
{
    public class WeatherForecast
    {
        public string WeatherStationId { get; set; }
        public DateTime TimeOfDay { get; set; }
        public Condition Condition { get; set; }
        public int Temperature { get; set; }
        public double PrecipitationChance { get; set; }
        public double PrecipitationAmount { get; set; }
    }

    public enum Condition
    {
        Rain,
        Cloudy,
        PartlyCloudy,
        PartlySunny,
        Sunny,
        Clear
    }
}

1 Answer

Steven Parker
Steven Parker
171,342 Points

:point_right: You have "weatherForecasts" as "weatherForcasts" (missing one "e") in two places.

It was probably like that for the last few tasks, but the checker didn't notice until you tried to assign to it.