Convert JSON String to JSON object in C#

This post will discuss how to convert a JSON String to a JSON object in C#.

1. Using `JsonSerializer.Deserialize()` method

For .NET versions 4.7.2 and later, you can use the JsonSerializer.Deserialize() method for deserializing a JSON string. It parses the specified JSON string into a specified .NET type.

The following example illustrates. Note that the JsonSerializer class is included in the System.Text.Json namespace.

using System;

using System.Text.Json;

public class Customer

{

public string Name { get; set; }

public int Age { get; set; }

public override string ToString() {

return $"[{Name}, {Age}]";

}

public class Example

{

public static void Main()

{

string jsonString = "[{\"Name\":\"Chris\",\"Age\":25},{\"Name\":\"Jennifer\",\"Age\":20}]";

List<Customer> customersList = JsonSerializer.Deserialize<List<Customer>>(jsonString);

foreach (Customer customer in customersList) {

Console.WriteLine(customer);

}

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2. Using `Json.NET` Library

Before .NET Framework 4.7.2, you can use the Json.NET library for deserializing a JSON. Its Newtonsoft.Json.JsonConvert.DeserializeObject() method accepts a JSON string to deserialize, and creates an instance of the object type, as specified by the generic parameter.

using System;

using System.Collections.Generic;

using Newtonsoft.Json;

public class Customer

{

public string Name { get; set; }

public int Age { get; set; }

public override string ToString() {

return $"[{Name}, {Age}]";

}

public class Example

{

public static void Main()

{

string jsonString = "[{\"Name\":\"Chris\",\"Age\":25},{\"Name\":\"Jennifer\",\"Age\":20}]";

List<Customer> customersList = JsonConvert.DeserializeObject<List<Customer>>(jsonString);

foreach (Customer customer in customersList) {

Console.WriteLine(customer);

}

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If you don’t need a typed object, you can do like:

using System;

using Newtonsoft.Json;

public class Example

{

public static void Main()

{

string jsonString = "[{\"Name\":\"Chris\",\"Age\":25},{\"Name\":\"Jennifer\",\"Age\":20}]";

dynamic customersList = JsonConvert.DeserializeObject(jsonString);

Console.WriteLine(customersList);

}

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3. Using `JavaScriptSerializer` Class

For AJAX-enabled applications, you can use the JavaScriptSerializer class for deserialization of data objects. To deserialize a JSON string, you can use the Deserialize() or DeserializeObject() methods.

The following example provides a simple illustration of JavaScriptSerializer.DeserializeObject() method.

using System;

using System.Collections.Generic;

using System.Web.UI;

using System.Web.Script.Serialization;

public class Customer

{

public string Name { get; set; }

public int Age { get; set; }

public override string ToString() {

return $"[{Name}, {Age}]";

}

public class Example

{

public static void Main()

{

string jsonString = "[{\"Name\":\"Chris\",\"Age\":25},{\"Name\":\"Jennifer\",\"Age\":20}]";

JavaScriptSerializer serializer = new JavaScriptSerializer();

List<Customer> customersList = serializer.Deserialize<List<Customer>>(jsonString);

foreach (Customer customer in customersList) {

Console.WriteLine(customer);

}

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That’s all about converting a JSON String to a JSON object in C#.

Convert JSON String to JSON object in C#

1. Using JsonSerializer.Deserialize() method

2. Using Json.NET Library

3. Using JavaScriptSerializer Class

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1. Using `JsonSerializer.Deserialize()` method

2. Using `Json.NET` Library

3. Using `JavaScriptSerializer` Class