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Home Forums How to convert JSON String to Object in C#? – MindStick
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1 Answers

Ravi Vishwakarma
Ravi Vishwakarma 10 Jun 2024
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In C#, you can convert a JSON string to an object using the System.Text.Json or Newtonsoft.Json (JSON.NET) libraries. 

Both libraries provide methods to deserialize JSON into C# objects.

Here's how you can do it using both libraries:

Using ‘System.Text.Json’

using System;
using System.Text.Json;
class Program
{
   static void Main()
   {
       // JSON string
       string json = "{\"Name\":\"John\",\"Age\":30,\"IsStudent\":true}";
       // Deserialize the JSON string to an object
       var obj = JsonSerializer.Deserialize<MyClass>(json);
       // Access object properties
       Console.WriteLine($"Name: {obj.Name}");
       Console.WriteLine($"Age: {obj.Age}");
       Console.WriteLine($"IsStudent: {obj.IsStudent}");
   }
   // Define a class to match the structure of the JSON object
   public class MyClass
   {
       public string Name { get; set; }
       public int Age { get; set; }
       public bool IsStudent { get; set; }
   }
}


Using ‘Newtonsoft.Json’

using System;
using Newtonsoft.Json;
using System;
using Newtonsoft.Json;
namespace ConsoleApplication1
{
   public class JSONToObject
   {
       public static void Convert()
       {
           // JSON string
           string json = "{\"Name\":\"John\",\"Age\":30,\"IsStudent\":true}";
           // Deserialize the JSON string to an object
           var obj = JsonConvert.DeserializeObject<MyClass>(json);
           // Access object properties
           Console.WriteLine("Name: {0}", obj.Name);
           Console.WriteLine("Age: {0}", obj.Age);
           Console.WriteLine("IsStudent: {0}", obj.IsStudent);
       }
   }
   // Define a class to match the structure of the JSON object
   public class MyClass
   {
       public string Name { get; set; }
       public int Age { get; set; }
       public bool IsStudent { get; set; }
   }
}

Explanation

  1. In both examples, a JSON string is provided, representing an object with properties Name, Age, and IsStudent.
  2. The JsonSerializer.Deserialize<T> method (from System.Text.Json) or JsonConvert.DeserializeObject<T> method (from Newtonsoft.Json) is used to convert the JSON string into an instance of a specific C# class (MyClass in this case).
  3. The resulting object (obj) can then be used to access its properties as usual.

Library Selection

  1. System.Text.Json is part of the .NET Core and .NET 5+ frameworks, providing high-performance JSON parsing and serialization.
  2. Newtonsoft.Json (JSON.NET) is a popular third-party library with extensive features and flexibility. It has been widely used in the .NET ecosystem for many years and provides excellent support for various scenarios.
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