How can I pass the JSON values as parameters in the method?

Question

I'm working on Nunit's data-driven method and I'm stuck with this issue. I want to pass values from the JSON file as the parameters in the test method. 'I've done this much so far but it's giving me an error that says: can not convert from 'Newtonsoft.Json.LinqToken' to 'string

public class TestData: BasePage 
{ 
    static JObject? data = ReadJson(@"jsconfig1.json");  
    static JToken? url = data.SelectToken("url").Value<string>(); 
    static JToken? username = data.SelectToken("username").Value<string>(); 
    static JToken? password = data.SelectToken("password").Value<string>(); 

    public void Login_Method()
    {
        driver.Url = url;
        driver.FindElement(By.Id("username")).SendKeys(username);
        driver.FindElement(By.Id("password")).SendKeys(password);
        driver.FindElement(By.Id("login")).Click();

        driver.Close();
    }

Answer 1

Let's say that the jsconfig1.json is like this:

var json = """
        {
            "url": "https://www.google.com",
            "username": "guest",
            "password": "pwd123"
        }
        """;

Then one way among others is to create a dto:

public record Config(string Url, string Username, string Password);

and then to deserialize using Text.Json:

var config = JsonSerializer.Deserialize<Config>(json, new JsonSerializerOptions() { PropertyNameCaseInsensitive = true });

string username = config.Username;
string password = config.Password;

Finally because the SendKeys method requires string as input you can use the above strings in order to submit the user/pass values