public ClientAddForm(CartForm cf)
{
parent = cf;
InitializeComponent();
var _selectedClients = db.ClientOfParks.Select(c => c.Name)
.ToList();
clientNameCB.DataSource = _selectedClients;
// clientNameCB.SelectedIndex = -1;
}
private void button5_Click(object sender, EventArgs e)
{
var cart = new CartForm(this);
cart.ShowDialog(this);
}