public AddSupplierForm()
{
InitializeComponent();
serviceDA = new DBControllerWSClient();
BindingList <supplier> supp = new BindingList <supplier>(serviceDA.queryAllSupplier());
int lastSupCode = supp[supp.Count() - 1].id;
String newSupCode = "SU" + (int.Parse(lastSupCode.ToString()) + 1).ToString("000");
txtCodProv.Text = newSupCode;
cbActive.Checked = true;
}