ICommand接口

一、DelegateCommand<T>（推荐）

    public class DelegateCommand : ICommand
    {
        public event EventHandler CanExecuteChanged;

        private Action action;

        public DelegateCommand(Action action)
        {
            this.action = action;
        }

        public bool CanExecute(object parameter)
        {
            return true;
        }

        public void Execute(object parameter)
        {
            action?.Invoke();
        }
    }
    public class DelegateCommand<T> : ICommand
    {
        public event EventHandler CanExecuteChanged;

        private Action<T> action;

        public DelegateCommand(Action<T> action)
        {
            this.action = action;
        }

        public bool CanExecute(object parameter)
        {
            return true;
        }

        public void Execute(object parameter)
        {
            action?.Invoke((T)parameter);
        }
    }

 

二、Action<object>

    public class MyCommand : ICommand
    {
        public event EventHandler CanExecuteChanged;

        private Action action;
        private Action<object> objectAction;
        public MyCommand(Action action)
        {
            this.action = action;
        }

        public MyCommand(Action<object> objectAction)
        {
            this.objectAction = objectAction;
        }

        public bool CanExecute(object parameter)
        {
            return true;
        }

        public void Execute(object parameter)
        {
            action?.Invoke();
            objectAction?.Invoke(parameter);
        }
    }