List<KeyValuePair<TKey,TValue>> Not support well #116

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1. devlead commented on Jan 22, 2020

   

   devlead

   on Jan 22, 2020

   Member

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   Does it work if you use Dictionary<TKey, TValue>?
2. MuGdxy commented on Jan 24, 2020

   

   MuGdxy

   on Jan 24, 2020

   Author

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       [Serializable]
       public class ToSave
       {
           public Dictionary<string, string> dic = new Dictionary<string, string>();
       }

   when i use Dictionary<TKey,TValue>,only <string,string> as key and value can work. when i try to use int or float or double or custom struct , it throws out "can not convert xxx into string" ( i just translate the error info into English, which is in my native language)
3. MuGdxy commented on Jan 24, 2020

   

   MuGdxy

   on Jan 24, 2020

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   and come back to List<KeyValuePair<TKey,TValue>>:
   when i use List<MyStruct> with

   public struct MyStruct
   {
       public string Key;
       public int Value;
   }

   instead of List<KeyValuePair<TKey,TValue>>
   JsonMapper.ToObject works well again.(actually i know well that it will work,because i have used this kind of structure for a long time. )
4. DevBear89 commented on Mar 9, 2021

   

   DevBear89

   on Mar 9, 2021

   Last edited by DevBear89

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   I Have Same Issue.
   I attach sample code and result. Please Check.

   using System;
   using System.Collections.Generic;
   
   public static class Program
   {
   	public static void Main()
   	{		
   		// Serialize object to JSON
   		var toObject = new HelloWorld();
   		toObject.dictionary.Add(101, true);
   		var toJson = LitJson.JsonMapper.ToJson(toObject);
   		Console.WriteLine("To JSON: {0}", toJson);
   
   		
   		// Serialize JSON to object
   		var fromJson = "{\"Message\":\"Hello world!\"}";
   		var fromObject = LitJson.JsonMapper.ToObject<HelloWorld>(fromJson);	
   		Console.WriteLine("From json: {0}", fromObject.dictionary);
   	}
   
   	public class HelloWorld
   	{
   		public Dictionary<int, bool> dictionary = new Dictionary<int, bool>();
   	}
   }
   

   Run-time exception (line 11): Unable to cast object of type 'System.Int32' to type 'System.String'.

   Stack Trace:

   [System.InvalidCastException: Unable to cast object of type 'System.Int32' to type 'System.String'.]
   at LitJson.JsonMapper.WriteValue(Object obj, JsonWriter writer, Boolean writer_is_private, Int32 depth)
   at LitJson.JsonMapper.WriteValue(Object obj, JsonWriter writer, Boolean writer_is_private, Int32 depth)
   at LitJson.JsonMapper.ToJson(Object obj)
   at Program.Main() :line 11