How to insert values inside a key using List and JSON

Question

I’m trying to do something that gives me a way out of this:

[
    {
        "Nome": "João",
        "Comprou": [
                       "Carro": "Sedan", "Preco": "12000",
                       "Moto": "Honda", "Preco": "8000"
                   ]
    }
]

For this I use List and to save use JSON.net. The problem is that I am not able to put one key inside another. I tried this way:

public class Cliente
{
    public string Nome { get; set; }
    public string[] Comprou { get; set; }
}
public static List<Cliente> Clientes = new List<Cliente>();

I don’t know how to assign one value within another. I want to take the products and put them in a listbox for the particular customer who is selected in another listbox. I tried using foreach:

Cliente cliente = Clientes[listaClientes.SelectedIndex];
foreach (var produto in cliente.Comprou)
{
        listaProdutosComprados.Items.Add(produto);
}

I wanted to put the values as "Name" and "Price" as I did with the client so that I could display these values in a label or textbox. I am developing this project in C# with a Winforms application.

Answer 1

You need to expand a little more your pro JSON.Net template to make the correct interpretation:

public class Cliente
{
    public string Nome { get; set; }
    public List<Veiculo> Comprou { get; set; }
}

public class Veiculo
{
    public string Carro { get; set; }  
    public string Moto { get; set; }
    public Decimal Preco { get; set; }
}

You can instantiate like this:

var clientes = new List<Cliente> {
    Nome = "João", 
    Comprou = new List<Veiculo> {
        new Veiculo {
            Carro = "Sedan",
            Preco = 12000
        },
        new Veiculo {
            Moto = "Honda",
            Preco = 8000
        }
    }
};

To serialize in JSON:

string output = JsonConvert.SerializeObject(clientes);

Source: http://james.newtonking.com/json/help/index.html