Deserializing JToken content to an Object

Question

I want to deserialize JToken content to an object (User). How am I able to do this?

Here is my json string:

string json = @"[{""UserId"":0,""Username"":""jj.stranger"",""FirstName"":""JJ"",""LastName"":""stranger""}]";

This being sent to an api parameter as JToken.

User class:

public class user
{
    public int UserId {get; set;}
    public string Username {get; set;}
    public string FirstName {get; set;}
    public string LastName {get; set;}
}

Web Api Method:

public IHttpActionResult Post([FromBody]JToken users)
{
      UserModel.SaveUser(users);
      //...
}

API Invocation in Salesforce:

string json = '[{"UserId":0,"Username":"jj.stranger","FirstName":"JJ","LastName":"stranger"}]';
HttpRequest req = new HttpRequest();
HttpResponse res = new HttpResponse();
Http http = new Http();
            
req.setEndpoint('test.com/api/UserManagement');
req.setMethod('POST');
req.setBody(json);
req.setHeader('Content-Type', 'application/json');
            
try {
    res = http.send(req);
} catch(System.CalloutException e) {
    System.debug('Callout error:' + e);
}
            
System.debug(res.getBody());

Answer 1

You can use JToken.ToObject generic method. http://www.nudoq.org/#!/Packages/Newtonsoft.Json/Newtonsoft.Json/JToken/M/ToObject(T)

Server API Code:

 public void Test(JToken users)
 {
     var usersArray = users.ToObject<User[]>();
 }

Here is the client code I use.

string json = "[{\"UserId\":0,\"Username\":\"jj.stranger\",\"FirstName\":\"JJ\",\"LastName\":\"stranger\"}]";
HttpClient client = new HttpClient();
var result = client.PostAsync(@"http://localhost:50577/api/values/test", new StringContent(json, Encoding.UTF8, "application/json")).Result;

The object gets converted to Users array without any issues.