8BitRick / json

A really simple C# JSON Parser in 350 lines

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Tiny Json

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A really simple C# JSON parser in ~350 lines

  • Attempts to parse JSON files with minimal GC allocation
  • Nice and simple "[1,2,3]".FromJson<List<int>>() API
  • Classes and structs can be parsed too!
class Foo 
{ 
  public int Value;
}
"{\"Value\":10}".FromJson<Foo>()
  • Anonymous JSON is parsed into Dictionary<string,object> and List<object>
var test = "{\"Value\":10}".FromJson<object>();
int number = ((Dictionary<string,object>)test)["Value"];
  • No JIT Emit support to support AOT compilation on iOS
  • Attempts are made to NOT throw an exception if the JSON is corrupted or invalid: returns null instead.
  • Only public fields and property setters on classes/structs will be written to
  • You can optionally use [IgnoreDataMember] and [DataMember(Name="Foo")] to ignore vars and override the default name

Limitations:

  • No JIT Emit support to parse structures quickly
  • Limited to parsing <2GB JSON files (due to int.MaxValue)
  • Parsing of abstract classes or interfaces is NOT supported and will throw an exception.

Example Usage

This example will write a list of ints to a File and read it back again:

using System;
using System.IO;
using System.Collections.Generic;

using TinyJson;

public static class JsonTest
{
  public static void Main(string[] args)
  {
    //Write a file
    List<int> values = new List<int> { 1, 2, 3, 4, 5, 6 };
    string json = values.ToJson();
    File.WriteAllText("test.json", json);
    
    //Read it back
    string fileJson = File.ReadAllText("test.json");
    List<int> fileValues = fileJson.FromJson<List<int>>();
  }
}

Save this as JsonTest.cs then compile and run with mcs JsonTest.cs && mono JsonTest.exe

Installation

Simply copy and paste the JSON Parser and/or the JSON Writer into your project. I also provide NuGet but I recommend the copy paste route ;)

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A really simple C# JSON Parser in 350 lines

License:MIT License


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