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Start your free trialChrister Monsen
3,664 Points[SOLVED] Code Challenge 4 of 4 Serializer
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 void SerializeWeatherForecasts(List<WeatherForecast>weatherForecasts, string fileName) {
var serializer = new JsonSerializer();
using (var writer = new StreamWriter(fileName))
using (var jsonWriter = new JsonTextWriter(writer))
{
serializer.Serialize(jsonWriter, weatherForecasts);
}
}
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;
}
}
}
2 Answers
Steven Parker
231,198 PointsYour call to serializer.Serialize is missing the second argument.
It looks like you're actually on task 4, not task 2. The instructions for task 4 are: "Inside the using block, call the Serialize method from the serializer object. The Serialize method takes a JsonTextWriter as its first parameter, and a List<WeatherForecast> as its second parameter."
Your call to serializer.Serialize has only one argument. Add the second one and you'll have it.
Christer Monsen
3,664 PointsGot it! :)
Scott George
19,060 PointsI'm still lost on no.4 I've got public static void SerializeWeatherForecasts(List<WeatherForecast> weatherForecasts,string fileName){ var serializer = new JsonSerializer (); using (var writer = new StreamWriter(fileName)) using (var JsonTextWriter = new JsonTextWriter(writer)) { serializer.Serialize (JsontWriter, List<WeatherForecast> ); }
}
But still not working
Christer Monsen
3,664 PointsChrister Monsen
3,664 PointsEdited: a second parameter for Serialize but it still tells me "Bummer! The second parameter in the 'Serialize' should be 'weatherForecasts'."