static void OnButtonBaseClick(object sender, RoutedEventArgs e)
{
ButtonBase btn = sender as ButtonBase;
ICommand cmd = ButtonBaseExtensions.GetCommand(btn);
object parameter = ButtonBaseExtensions.GetCommandParameter(btn);
if (cmd != null && cmd.CanExecute(parameter))
{
cmd.Execute(parameter);
}
}
static void OnCommandCanExecuteChanged(object sender, EventArgs e)
{
ICommand cmd = sender as ICommand;
if (cmd != null && s_commandToButtonsMap.ContainsCommand(cmd))
{
s_commandToButtonsMap.ForEachButton(cmd, btn =>
{
object parameter = ButtonBaseExtensions.GetCommandParameter(btn);
btn.IsEnabled = cmd.CanExecute(parameter);
});
}
}
static void OnCommandParameterChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
ButtonBase btn = obj as ButtonBase;
if (btn == null)
{
throw new ArgumentException("You must set the CommandParameter attached property on an element that derives from ButtonBase.");
}
ICommand cmd = ButtonBaseExtensions.GetCommand(btn);
if (cmd == null)
{
return;
}
object parameter = ButtonBaseExtensions.GetCommandParameter(btn);
btn.IsEnabled = cmd.CanExecute(parameter);
}
