[WPF]ICommand最佳使用方法

 public class RelayCommand:ICommand

    {

        private Predicate<object> _canExecute;

        private Action<object> _execute;

        public RelayCommand(Predicate<object> canExecute, Action<object> execute)

        {

            this._canExecute = canExecute;

            this._execute = execute;

        }

        public event EventHandler CanExecuteChanged

        {

            add { CommandManager.RequerySuggested += value; }

            remove { CommandManager.RequerySuggested -= value; }

        }

        public bool CanExecute(object parameter)

        {

            return _canExecute(parameter);

        }

        public void Execute(object parameter)

        {

            _execute(parameter);

        }

    }

使用：

public class MyViewModel

{

    private ICommand _doSomething;

    public ICommand DoSomethingCommand

    {

        get

        {

            if (_doSomething == null)

            {

                _doSomething = new RelayCommand(

                    p => this.CanDoSomething,

                    p => this.DoSomeImportantMethod());

            }

            return _doSomething;

        }

    }

}

其中，Predicate<object>：

巴特西

[WPF]ICommand最佳使用方法

最新文章

热门文章