29-12-2015 15:13:50 C# / WPF 0 Bookmark(s) 554 View(s)

 

public class Command : ICommand
{
    private readonly Action<object> _execute;
    private readonly Predicate<object> _canExecute;

    public Command(Action<object> execute, Predicate<object> canExecute = null)
    {
        _execute = execute;
        _canExecute = canExecute;
    }

    public Command(Action execute, Predicate<object> canExecute = null)
    {
        _execute = (o => execute());
        _canExecute = canExecute;
    }

    public bool CanExecute(object parameter)
    {
        if (_canExecute != null)
        {
            return _canExecute(parameter);
        }
        
        return true;
    }

    public void Execute(object parameter)
    {
        _execute(parameter);
    }

    public void FireCanExecuteChanged()
    {
        CanExecuteChanged.Fire(this);
    }

    public event EventHandler CanExecuteChanged;
}