In this article I will explain with an example, how to use Newtonsoft library in ASP.Net Core.
Note: For beginners in ASP.Net MVC Core 7, please refer my article ASP.Net Core 7: Hello World Tutorial with Sample Program example.
 
 

ASPSnippets Test API

The following API will be used in this article.
https://raw.githubusercontent.com/aspsnippets/test/master/Customers.json
The API returns the following JSON.
[
 {
    "CustomerId": 1,
    "Name": "John Hammond",
    "Country": "United States"
 },
 {
    "CustomerId": 2,
    "Name": "Mudassar Khan",
    "Country": "India"
 },
 {
    "CustomerId": 3,
    "Name": "Suzanne Mathews",
    "Country": "France"
 },
 {
    "CustomerId": 4,
    "Name": "Robert Schidner",
    "Country": "Russia"
 }
]
 
 

Installing Newtonsoft package using Nuget

In order to install Newtonsoft library using Nuget, please refer my article Installing Newtonsoft library using Nuget.
 
 

Model

The Model class consist of the following properties.
public class CustomerModel
{
    public int CustomerId { get; set; }
    public string Name { get; set; }
    public string Country { get; set; }
}
 
 

Namespaces

You will need to import the following namespaces.
using System.Net;
using Newtonsoft.Json;
 
 

Controller

The Controller consists of following Action method.

Action method for handling GET operation

Inside this Action method, first the JSON string is downloaded from an API using DownloadString method of the WebClient class.
Note: SecurityProtocol needs to be set to TLS 1.2 (3072) in order to call an API. For previous .Net Framework versions, please refer Using TLS1.2 in .Net 2.0, .Net 3.0, .Net 3.5 and .Net 4.0.
 
Then, JSON string is converted into a Generic List collection of CustomerModel class object using DeserializeObject method of JsonConvert class.
Finally, View is returned.
public class HomeController : Controller
{
    public IActionResult Index()
    {
        ServicePointManager.Expect100Continue = true;
        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
        string json = (new WebClient()).DownloadString("https://raw.githubusercontent.com/aspsnippets/test/master/Customers.json");
        List<CustomerModel> customers = JsonConvert.DeserializeObject<List<CustomerModel>>(json);
        return View();
    }
}
 
 

Screenshot

Using Newtonsoft library in ASP.Net Core
 
 

Downloads

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