Having a composition relationship in ASP .NET? - list

Question

I have a Car composed by a Driver. I have problems showing either informations on the gridview. It's only shows Car's info. on the gridview, and I wanna display like: Car: Lancia Driver: Sandro, something like that.
Here's the code:
Car:
[Serializable]
public class Car
{
public String Brand { get; set; }
public String Model { get; set; }
public int Year { get; set; }
public Driver Driver { get; set; }
public Car(String Brand, String Model, int Year, Driver Driver)
{
Brand = Brand;
Model = Model;
Year = Year;
Driver = Driver;
}
public Car()
{
Init();
}
public void Init()
{
Brand = string.Empty;
Model = string.Empty;
Year = 0;
Driver = new Driver();
}
Driver:
[Serializable]
public class Driver
{
public String Name { get; set; }
public int Age { get; set; }
public String Nationality { get; set; }
public Driver(String Name, int Age, String Nationality)
{
Name = Name;
Age = Age;
Nationality = Nationality;
}
public Driver()
{
Init();
}
public void Init()
{
Name = string.Empty;
Age = 0;
Nationality = string.Empty;
}
}
aspx.cs:
public partial class WebForm1 : System.Web.UI.Page
{
//private ArrayList garageList;
private List<Car> garageList;
private static int counterPost = 0;
private static int counterLoad = 0;
public void Page_Load(object sender, EventArgs e)
{
TextBox masterTextLoad = (TextBox) Master.FindControl("txtLoad");
masterTextLoad.Text = Convert.ToString(counterLoad++);
if (IsPostBack)
{
TextBox masterTextPost = (TextBox) Master.FindControl("txtPost");
masterTextPost.Text = Convert.ToString(counterPost++);
garageList = (List<Car>)ViewState["Cars"];
//garageList = (ArrayList) ViewState["Cars"];
if (garageList == null)
{
//garageList = new ArrayList();
garageList = new List<Car>();
}
}
}
protected void btnAdd_Click(object sender, EventArgs e)
{
//Driver
Driver driver = new Driver();
TextBox driverName = (TextBox) Master.FindControl("txtName");
driver.Name = driverName.Text;
TextBox driverAge = (TextBox) Master.FindControl("txtAge");
driver.Age = Convert.ToInt32(driverAge.Text);
TextBox driverNationality = (TextBox)Master.FindControl("txtNationality");
driver.Nationality = driverNationality.Text;
//Car
Car car = new Car();
car.Brand = txtBrand.Text;
car.Model = txtModel.Text;
car.Year = Int32.Parse(txtYear.Text);
garageList.Add(car);
//ViewState["Cars"] = garageList;
ViewState["garageList"] = garageList;
cleanControls();
}
private void cleanControls()
{
//Cleaning driver controls
TextBox masterTextPost = (TextBox)Master.FindControl("txtPost");
masterTextPost.Text = string.Empty;
TextBox driverName = (TextBox)Master.FindControl("txtName");
driverName.Text = string.Empty;
TextBox driverAge = (TextBox)Master.FindControl("txtAge");
driverAge.Text= string.Empty;
TextBox driverNationality = (TextBox)Master.FindControl("txtNationality");
driverNationality.Text = string.Empty;
//Cleaning Car controls
txtBrand.Text = String.Empty;
txtModel.Text = String.Empty;
txtYear.Text = String.Empty;
}
protected void btnShow_Click1(object sender, EventArgs e)
{
grvShow.AutoGenerateColumns = true;
grvShow.DataSource = garageList;
grvShow.DataBind();
//grvShow.Visible = true;
}
}