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C# C# Streams and Data Processing Serialization Serializing to a File

Posted by Tom Dalton
Tom Dalton
1,793 Points

Can't get past part 4, unhelpful error

I get up to step 3, but at step 4 (add the serialiser.Serialize line), I keep getting an error: " Bummer! Did you call the Serialize method on the 'serializer' object?". Well, I'm pretty sure I have called it, so the error isn't really helpful. I followed through the player example for the course and have pretty much exactly the same code for the football player serialisation, and that works, so I'm wondering if this is a but with the course itself or the test framework Treehouse is using?!

        public static void SerializeWeatherForecasts(List<WeatherForecast> weatherForecasts, string fileName)
        {
            var serialiser = new JsonSerializer();

            using (var writer = new StreamWriter(fileName))
            using (var jsonWriter = new JsonTextWriter(writer))
            {
                serialiser.Serialize(jsonWriter, weatherForecasts);
            }
        }
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)
        {
        }

        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;
        }

        public static List<WeatherForecast> DeserializeWeather(string fileName)
        {
            var weatherForecasts = new List<WeatherForecast>();

            using (var reader = new StreamReader(fileName))
            using (var jsonReader = new JsonTextReader(reader))
            {
                var serializer = new JsonSerializer();
                weatherForecasts = serializer.Deserialize<List<WeatherForecast>>(jsonReader);
            }

            return weatherForecasts;
        }

        public static void SerializeWeatherForecasts(List<WeatherForecast> weatherForecasts, string fileName)
        {
            var serialiser = new JsonSerializer();

            using (var writer = new StreamWriter(fileName))
            using (var jsonWriter = new JsonTextWriter(writer))
            {
                serialiser.Serialize(jsonWriter, weatherForecasts);
            }
        }
    }
}
WeatherForecast.cs 
using System;
using Newtonsoft.Json;

namespace Treehouse.CodeChallenges
{
    public class WeatherForecast
    {
        [JsonProperty(PropertyName = "weather_station_id")]
        public string WeatherStationId { get; set; }
        [JsonProperty(PropertyName = "time_of_day")]
        public DateTime TimeOfDay { get; set; }
        public Condition Condition { get; set; }
        public int Temperature { get; set; }
        [JsonProperty(PropertyName = "precipitation_chance")]
        public double PrecipitationChance { get; set; }
        [JsonProperty(PropertyName = "precipitation_amount")]
        public double PrecipitationAmount { get; set; }
    }

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

2 Answers

Simon McGuirk
Simon McGuirk
2,673 Points
Simon McGuirk
Simon McGuirk
2,673 Points

Think its because you've named the var serialiser and not serializer which is what the code checker may be looking for.

Tom Dalton
Tom Dalton
1,793 Points

Thanks! I added that variable at part 2 and it accepted it then, so didn't think it would be a spelling issue! Thanks very much for the extra pair of eyes!

Simon McGuirk
Simon McGuirk
2,673 Points
Simon McGuirk
Simon McGuirk
2,673 Points

No worries. Glad it helped :)