public AuthView()
{
InitializeComponent();
this.WhenActivated(d => {
// Control bindings
d(this.Bind(ViewModel, x => x.Username, x => x.Username.Text));
d(this.Bind(ViewModel, x => x.Password, x => x.Password.Password, Password.Events().PasswordChanged));
d(this.BindCommand(ViewModel, x => x.SignIn, x => x.SignIn));
// Change the text of the SignIn control based on state
d(this.WhenAnyObservable(x => x.ViewModel.SignIn.IsExecuting)
.Subscribe(state => { SignIn.Content = state ? "Signing In..." : "Sign In"; }));
// Invoke ViewModel commands when the external "links" are clicked
d(NoAccount.Events().MouseLeftButtonUp.InvokeCommand(ViewModel, x => x.Registration));
d(ForgotPass.Events().MouseLeftButtonUp.InvokeCommand(ViewModel, x => x.ResetPassword));
// Attempt to grab the users avatar when the Username control loses focus
d(Username.Events().LostFocus.InvokeCommand(ViewModel, x => x.Avatar));
// Received `IBitmap` of the users avatar
d(this.WhenAnyObservable(x => x.ViewModel.Avatar)
.Subscribe(bitmap => Avatar.Source = bitmap.ToNative()));
// Allow 'Enter/Return' to execute authentication
d(this.Events().KeyUp
.Where(x => x.Key == Key.Enter)
.Where(_ => ViewModel.SignIn.CanExecute(null))
.Subscribe(_ => ViewModel.SignIn.Execute(null)));
});
}
public static void Main()
{
Account acc = new Account(100);
// Use a class reference
Console.WriteLine("balance = {0}", acc.Balance);
acc.Deposit(25);
Console.WriteLine("balance = {0}", acc.Balance);
// Use an interface reference
IBasicAccount ifc = (IBasicAccount)acc;
ifc.Deposit(25);
Console.WriteLine("balance = {0}", ifc.Balance);
// Now try same things with class not implementing IBasicAccount
NoAccount acc2 = new NoAccount(500);
// Use a class reference
Console.WriteLine("balance = {0}", acc2.Balance);
acc2.Deposit(25);
Console.WriteLine("balance = {0}", acc2.Balance);
// Try an interface pointer
try
{
IBasicAccount ifc2 = (IBasicAccount)acc2;
ifc2.Deposit(25);
Console.WriteLine("balance = {0}", ifc2.Balance);
}
catch (InvalidCastException e)
{
Console.WriteLine("IBasicAccount is not supported");
Console.WriteLine(e.Message);
}
}
