StackOverflow Q28520876

CSharp · Console

/Program.cs

using System;
using System.Collections.Generic;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
					
public class Program
{
	public static void Main()
	{
		string json = @"{
            ""PM00000001"": { ""description"": ""Manufacturing"",""cost"": -1,""group"":""Manufacturing"",""WeldAngleDegrees"": 60},
            ""PM00000010"": {""description"": ""Plate Roll"",""cost"": 90,""unit"": ""hr"",""group"": ""Roll"",""setup"": 0.5,""speed"": 0.4},
            ""PM00000011"": {""description"": ""Weld SAW"",""cost"": 90,""unit"": ""hr"",""group"": ""Weld"",""width"": 0.5,""thickness"": 50}
        }";
		
		var dict = JsonConvert.DeserializeObject<Dictionary<string, Item>>(json, new ItemConverter());
		
		foreach (var kvp in dict)
		{
			Console.WriteLine(kvp.Key);
			Console.WriteLine(kvp.Value + "\n");
		}
	}
}

public class Item
{
	public string description { get; set; }
	public double cost { get; set; }
	public string group { get; set; }
	public override string ToString()
	{
		return string.Format("description: {0}\ncost: {1}\ngroup: {2}", description, cost, group);
	}
}

public class ManufacturingItem : Item
{
	public string WeldAngleDegrees { get; set; }
	public override string ToString()
	{
		return string.Format("{0}\nweld angle: {1}", base.ToString(), WeldAngleDegrees);
	}
}

public class RollItem : Item
{
	public double setup { get; set; }
	public double speed { get; set; }
	public override string ToString()
	{
		return string.Format("{0}\nsetup: {1}\nspeed: {2}", base.ToString(), setup, speed);
	}
}

public class WeldItem : Item
{
	public double width { get; set; }
	public double thickness { get; set; }
	public override string ToString()
	{
		return string.Format("{0}\nwidth: {1}\nthickness: {2}", base.ToString(), width, thickness);
	}
}

public class ItemConverter : JsonConverter
{
	public override bool CanConvert(Type objectType)
	{
		return objectType == typeof(Item);
	}
	
	public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
	{
		JObject jo = JObject.Load(reader);
		string group = (string)jo["group"];
		if (group == "Manufacturing")
		{
			return jo.ToObject<ManufacturingItem>();
		}
		else if (group == "Roll")
		{
			return jo.ToObject<RollItem>();
		}
		else if (group == "Weld")
		{
			return jo.ToObject<WeldItem>();
		}
		throw new JsonSerializationException("Unexpected item (group) type");
	}
	
	public override bool CanWrite
	{
		get { return false; }
	}
	
	public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
	{
		throw new NotImplementedException();
	}
}